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Positions

at the FHI are available either as employment contracts or as stipends in the framework of the FHI guest program

Physikalische Chemie
The Fritz-Haber-Institut (Physikalische Chemie) offers a
  1 PhD-position and 1 Postdoc Position
position(s).

The Lattice Dynamics group headed by Dr. Alex Paarmann within the Department of Physical Chemistry at the Fritz Haber Institute offers

1 PhD-position and 1 Postdoc Position on the topic

Far-infrared super-resolution microscopy by FEL-based sum-frequency generation

Our group: We are interested in optical phonons in polar dielectric crystals and their heterostructures, as well as at their interfaces. We use various linear and nonlinear mid-infrared to THz spectroscopy techniques, employing the free-electron laser (FEL) at our institute as a unique intense and tunable infrared to THz light source. We study various solid state, interface, and nanophotonic problems, with a particular emphasis on developing new experimental methods based on nonlinear optics. Apart from nonlinear spectroscopy, we recently added spatial resolution to these approaches by means of infrared-visible sum-frequency generation microscopy.

Your tasks: The successful candidates will develop a new experimental setup for infrared-visible sum-frequency generation wide-field microscopy employing the infrared FEL at our institute. This encompasses installation of a new high-power visible laser system, its synchronization to the FEL, as well as development of the optical microscope system. The new SFG microscope will allow studying many problems ranging from resonant super-resolution imaging of low-dimensional nanophotonic structures to in-situ imaging of spatial heterogeneity in electrochemical systems.

Your profile: The applicants should hold excellent degrees (PhD applicant: masters/diploma; Postdoc applicant: PhD degree) in physics, chemistry, material science or related fields. Experience in at least one of the areas of optical microscopy, nanophotonics, nonlinear spectroscopy, pump-probe experiments, or surface science are expected for postdocs and beneficial for PhD-students. Experimental experience is highly desired.

Funding: The Post-Doc position is initially limited to one year with the option for extension. The PhD position is limited to three years (extension possible) with a starting salary corresponding to a 60% TVöD/E13 position.

Your application: Post-doctoral applicants should send their letter of motivation, CV, research summary and up to 3 recommendation letters. Ph. D. candidates should send their letter of motivation, CV and grades.

Please send your application by email to alexander.paarmann@fhi-berlin.mpg.de

For more information please visit our website at https://pc.fhi-berlin.mpg.de/latdyn or contact us:

Alex Paarmann, Ph. D.
Fritz-Haber-Institut der Max-Planck-Gesellschaft
Abteilung Physikalische Chemie
Faradayweg 4-6
14195 Berlin
Germany
e-mail: alexander.paarmann@fhi-berlin.mpg.de
Phone: +49 (0)30 8514 5121

The Max Planck Society aims to increase the participation of women in research. Therefore, applications by women are particularly welcome. Handicapped individuals are especially encouraged to apply. These applicants will be given priority in the case of same qualifications.

We handle applications electronically, observing the German data privacy laws. By sending the application, the applicant declares his or her consent.
Physikalische Chemie
The Fritz-Haber-Institut (Physikalische Chemie) offers a
  1 PhD position and 1 Postdoc Position
position(s).

The Research Group Ultrafast Scanning Probe Microscopy headed by Dr. Melanie Müller within the Department of Physical Chemistry at the Fritz-Haber-Institute offers

1 PhD-position and 1 Postdoc Position on the topic

Probing photoexcited surface dynamics on the nanometer scale with THz-STM

Our group: We focus on the development and application of THz-gated Scanning Tunnelling Microscopy combined with optical photoexcitation for the investigation of photo-induced processes with femtosecond temporal and atomic spatial resolution. Our setup is operational since early 2019 and we are currently looking for motivated members to join our team.

Research background: Our research aims at understanding the role of the atomic-scale local environment on the dynamics of charge carriers in nanostructures and at surfaces upon ultrafast optical excitation. We use ultrashort laser pulses and single-cycle THz sources for excitation of a Scanning Tunnelling Microscope. Employing IR pump-THz probe type experiments we anticipate to take ultrashort snapshots of the photoexcited STM junction and to image the local ultrafast dynamics of charge carriers at surfaces with atomic resolution. Moreover, we will use THz-pulses to control the local injection of charge carriers on femtosecond time scales, and combine numerical simulation methods with experimental results to understand the response of nanotips as THz-antennas.

Your tasks: The successful candidates will conduct VIS/IR pump-THz probe experiments in the STM with an initial focus on understanding the joint interaction of THz- and optical laser pulses with the tip-sample junction. Further on, the candidates will accomplish imaging of the local dynamic response of photoexcited nanostructures and surfaces, explore possible pathways of excitation and ultrafast probing of the tip-sample junction, and contribute to the further technical development of the setup.

Your profile: The applicants should hold excellent degrees (PhD applicant: masters/diploma; Postdoc applicant: PhD degree) in physics, chemistry, material science or related fields. Experience in at least one of the areas of ultrafast laser technology, THz generation, scanning probe microscopy, low-temperature and ultrahigh vacuum technology, pump-probe experiments and 2D materials are expected for postdocs and beneficial for phd-students.

Funding: The Post-Doc position is initially limited to one year with the option for extension. The PhD position is limited to three years (extension possible) with a starting salary corresponding to a 60% TVöD/E13 position.

YOUR APPLICATION: Post-doctoral applicants should send their letter of motivation, CV, research summary and up to 3 recommendation letters. Ph. D. candidates should send their letter of motivation, CV and grades.

Please send your application by email to m.mueller@fhi-berlin.mpg.de

For more information please visit our website at https://pc.fhi-berlin.mpg.de/ufspm/ or contact us:

Dr. Melanie Müller
Fritz-Haber-Institut der Max-Planck-Gesellschaft
Department of Physical Chemistry
Faradayweg 4-6
14195 Berlin
Germany
e-mail: m.mueller@fhi-berlin.mpg.de
Phone: +49 (0)30 8514 5134

The Max Planck Society aims to increase the participation of women in research. Therefore, applications by women are particularly welcome. Handicapped individuals are especially encouraged to apply. These applicants will be given priority in the case of same qualifications.

We handle applications electronically, observing the German data privacy laws. By sending the application, the applicant declares his or her consent.

Physikalische Chemie
The Fritz-Haber-Institut (Physikalische Chemie) offers a
  Bachelor or Master Project on Hematite Thin Film Synthesis for Photoelectrochemical Water Splitting
position(s).

We are currently looking for an advanced student who wants to prepare a bachelor or master thesis in a physicochemical project at the the Fritz-Haber-Institute of the Max-Planck-Society. The scientic goal of the project is the optimization and investigation of a hematite (alpha-Fe2O3) thin film system for photoelectrochemical water oxidation in the context of solar fuels and artificial photosynthesis.
The candidate would prepare Hematite thin films via a wet/thermo chemical route and characterize them using diverse photoelectrochemical techniques, Raman spectroscopy and/or scanning electron microscopy.
Besides procient English speaking an ideal candidate should fulfill at least one of the following requirements:

- Advanced studies of chemistry, physics or materials science
- Coursework and experience in solid state chemistry/physics or surface science
- Practical experience in electrochemistry, thin film deposition, Raman spectroscopy or electron microscopy
- Interest or knowledge on solar energy research

Interested students may send their applications including a short motivation letter and curriculum vitae, a list of courses and an official university transcript in one single pdf-file to both
Julius Plescher: plescher[*at*]fhi-berlin.mpg.de and
Kramer Campen: campen[*at*]fhi-berlin.mpg.de.
Physikalische Chemie
The Fritz-Haber-Institut (Physikalische Chemie) offers a
  Open Post-Doctoral Researcher Position
position(s).

Open Post-Doctoral Researcher Position on the topic *Understanding Electron Transfer Across the Hematite/Liquid Water Interfaces*

Understanding the surface (photo)chemistry of Hematite in contact with aqueous solution is important both from geochemical and photoelectrochemical water splitting perspectives: Hematite is cheap, common in the environment, and its valence band energy and relatively narrow band gap make it a thermodynamically favourable material both for solar driven oxidation of water (i.e. oxygen evolution) and of a variety of organic compounds. To date application of Hematite in water splitting devices and quantitative understanding of its role in biogeochemical cycling is limited by a lack of knowledge of its surface photochemistry: in particular what are the surface states under operando conditions and what role do they play in aqueous phase redox chemistry. This limitation reflects an absence of appropriate tools to interrogate the this interface under illumination. As part of a recently funded ERC Consolidator grant we seek a post-doc to work on the development and application of novel, interface-specific, nonlinear optical techniques to watch electron transfer at this interface with femtosecond time resolution. The ideal candidate for this position would have extensive experience (demonstrable by a publication record commensurate with time from the PhD) in at least one of,

- Femtosecond resolved nonlinear optical spectroscopy,
- Photoelectrochemical water splitting using conventional characterisation techniques: light and voltage modulated impedance spectroscopies, conventional linear optical characterisation, etc.

The position will be initially for one year and can be extended up to four based on mutual agreement.

To apply please send a single pdf containing the following materials to Dr. Kramer Campen (campen@fhi-berlin.mpg.de):

1. A < 1 pg letter of motivation explaining why you’d like this position and its fits into your future career plans.
2. A CV and list of publications.
3. Copies of your two most relevant publications with a statement describing your contribution to each.

Additionally please arrange for at least two letters of reference to be sent to campen@fhi-berlin.mpg.de by people familiar with your work (at least one of which should be from your PhD advisor). While the position will be open until filled, please apply before December 6th, 2018 to ensure full consideration. Additional questions should be addressed to:

Dr. R. Kramer Campen
Fritz-Haber-Institut der MPG
Berlin 14195
Germany
e-mail: campen@fhi-berlin.mpg.de
Physikalische Chemie
The Fritz-Haber-Institut (Physikalische Chemie) offers a
  PhD-position
position(s).

The Fritz Haber Institute (Department of Physical Chemistry) offers a

PhD-position for Charge Transport at the Single-Molecule Level .

Research background: The functional units in organic devices can be synthesized with atomic precision. The resulting miniaturization of the integrated circuit leads to an improved performance and power consumption. Key to the development of organic devices is a profound understanding of the charge transport on a single molecular level. Scanning probe microscopy (SPM) became a powerful tool for the investigation of nanostructures as well as for single molecules, the core of organic devices. Recent experiments confirmed that the environment, the conformation and the coupling of molecular wire have a strong influence on its charge transport properties.

Your tasks: We will develop a new silicon sample architecture for SPM that hosts an integrated circuit. In contrast to molecular break junction and SPM pulling experiments, the adsorption geometry and position of the molecules can be fully characterized by SPM imaging while studying their electrical properties. These novel samples are developed at the NPZ clean room facilities of the TU-Berlin. In a next step we want to extend the integrated circuit to nanoscopic contact patches with scanning tunneling hydrogen resist lithography. This allows us to fabricate electrodes which are as small as two atomic rows and which act as gate, source or drain in single-molecule transport measurements.

This setup is unique because the SPM tip can characterize the molecular junction with sub-molecular resolution. Further, we can position individual molecules with nm precision by SPM manipulation and most importantly, the SPM tip can act as an additional electrode which can be placed with Angstrom precision. This combination of SPM imaging, SPM manipulation and transport measurements allows us not only to tune the junction but also to correlate the measurement signals to the precise chemical composition of the junction.

Your profile: Potential PhD students should have a background in physics or related subject, solid-state physics, low temperature scanning probe microscopy and/or device fabrication.

Your application: To apply please send a letter of motivation, a CV and your two most relevant publications preferred by email to

Dr. Matthias Koch
Fritz Haber Institute of the Max Planck Society
Department of Physical Chemistry
Faradayweg 4-6
14195 Berlin
e-mail: m.koch@fhi-berlin.mpg.de
phone: +49 30 8413 5138

The Max Planck Society aims to increase the participation of women in research. Therefore, applications by women are particularly welcome. Handicapped individuals are especially encouraged to apply. These applicants will be given priority in the case of same qualifications.

We handle applications electronically, observing the German data privacy laws. By sending the application, the applicant declares his or her consent.

Physikalische Chemie
The Fritz-Haber-Institut (Physikalische Chemie) offers a
  MS Project on the topic *Building a New Light Source for Surface Specific Vibrational Spectroscopy*
position(s).

The ability to generate femtosecond duration continuum light sources is revolutionising vibrational spectroscopy: we are just entering an era in which the possibility of characterising the entire vibrational spectrum with femtosecond time resolution is possible. However, to this point, the application of such sources to surface-specific nonlinear optical probing techniques has lagged, principally because of the high pulse energies such methods generally require. Much effort has been expended over the last 3 years developing such sources for applications other types of experiments in solid-state and AMO physics. The Interfacial Molecular Spectroscopy Group in the Physical Chemistry Department at the Fritz Haber Institute seeks a motivated MS student to optimise such a source for application to surface-specific vibrational spectroscopy. The ideal student should have a background in Physics, Photonics, Electrical Engineering or Physical Chemistry. Requests for additional information and applications should be sent to Dr. Martin Thaemer (thaemer@fhi-berlin.mpg.de, subject: Continuum-MS) in a single pdf with the following materials:

> 1. Letter of motivation explaining why you find this project interesting.
> 2. Certificates showing your academic record including results on a per course basis.
> 3. CV showing any previous relevant experience: particularly prior research internships.
Physikalische Chemie
The Fritz-Haber-Institut (Physikalische Chemie) offers a
  PhD
position(s).

Development of a narrowband XUV source

The Emmy Noether research group Dynamics of Correlated Materials at the Fritz Haber Institute (http://www.fhi-berlin.mpg.de/pc/docm-new.html) is offering a PhD position in experimental condensed matter physics and laser development. The group investigates the ultrafast dynamical processes in strongly correlated systems, in order to understand the manifold of competing broken-symmetry ground states of those materials such as high-temperature superconductivity, magnetic orders or density wave formation. The Fritz Haber Institute and the department of physical chemistry offer an excellent and interdisciplinary environment for top-of-the-line research. The group operates and further develops a world-leading high repetition rate extreme ultraviolet (XUV) time- and angle-resolved photoelectron spectroscopy (trARPES) setup based on a high-power all fiber-driven OPCPA laser system.

Topic of the doctoral thesis: Development of a narrow-band high-repetition rate high harmonics generation (HHG) XUV light source for time-resolved ARPES experiments in unconventional superconductors. The successful applicant will construct and build a novel narrow-band XUV source for trARPES with high energy resolution, which will be complementary to the existing HHG setup that is optimized for high temporal resolution. This HHG source will be then used to investigate the ultrafast dynamics in strongly correlated materials exhibiting ordering phenomena at small energy scales such as high-temperature superconducting Cuprates and Fe pnictides, antiferromagnetic or heavy-Fermion Kondo systems.

Applicants should hold an excellent Diploma or Master degree in Physics or Material Sciences, and should have a strong background and interest in at least one of the following areas:

- ultrafast laser development and technology
- pulse shaping and compression
- high-harmonic generation
- femtosecond time-resolved spectroscopies
- photoelectron spectroscopy
- physics of strongly correlated materials

The appointment will be for a duration of 36 months and the initial salary will be oriented at the TVöD (E13, 60%) with the potential for performance-related raises (up to 75%). Preference will be given to female and handicapped applicants provided equal suitability. Applications (motivation letter, CV, list of publications, description of previous work, contact details of at least two academic references, etc.) shall be sent to:

Dr. Laurenz Rettig
Fritz Haber Institute of the Max Planck Society
Department of Physical Chemistry
Faradayweg 4-6
D-14195 Berlin
Germany
E-mail: rettig@fhi-berlin.mpg.de
Physikalische Chemie
The Fritz-Haber-Institut (Physikalische Chemie) offers a
  Two PhD
position(s).

The Emmy Noether Research Group Dynamics of Correlated Materials at the Fritz-Haber-Institute is offering two PhD positions in experimental condensed matter physics. The group investigates the ultrafast dynamical processes in strongly correlated systems, in order to understand the manifold of competing broken symmetry ground states of those materials such as high-temperature superconductivity, magnetic orders or density wave formation. The Fritz Haber Institute and the Department of Physical Chemistry offer an excellent and interdisciplinary environment for top-of-the-line research.T he group operates a world-leading high-repetition rate extreme ultraviolet (XUV) time- and angle-resolved photoelectron spectroscopy (trARPES) setup and performs time-resolved x-ray diffraction experiments at large scale research facilities.

Topics of the research: Both offered positions concentrate on the femtosecond dynamics of phase transitions in strongly correlated materials, which arise due to the strong interplay of electronic, lattice and spin degrees of freedoms. By employing a combination of complementary time-resolved techniques sensitive to the respective degrees of freedom those couplings will be directly assessed in the time-domain. The first position will concentrate the electronphonon coupling in model systems exhibiting metal-insulator transitions induced by charge density wave order, while the second position will investigate the interplay of electronic correlations and magnetic ordering in various classes of antiferromagnetic model systems, which hold a strong relevance for future spintronic applications. The experiments include femtosecond XUV trARPES measurements, giving access to electron dynamics, and complementary information on spin and lattice ordering will be gained from time-resolved (resonant) x-ray diffraction experiments performed at synchrotron and/or free-electron laser facilities. Additional ultrafast electron diffraction experiments can be performed in collaboration with the Structural & Electron Surface Dynamics group at the FHI. Sample preparation will include in-situ growth as well as sample cleaving in UHV chambers.

Applicants should hold an excellent Diploma or Master degree in Physics or Material Sciences, and should have a strong background and interest in at least one of the following areas:
- femtosecond time-resolved spectroscopies
- photoelectron spectroscopy
- x-ray or electron diffraction
- in-situ growth of epitaxial metal and oxide films in ultrahigh vacuum
- physics of strongly correlated materials

Both appointments will be for a duration of 36 months and initial salary is according to TVöD-L (E13, 60 percent), with the potential for a performance-related raise up to 75 percent). Preference will be given to female or handicapped applicants provided equal suitability. Applications (motivation letter, CV, list of publications, description of previous work, contact details of academic references, etc.) shall be sent to:

Dr. Laurenz Rettig
Fritz Haber Institute of the Max Planck Society
Department of Physical Chemistry
Faradayweg 4-6
D-14195 Berlin Germany
E-Mail: rettig@fhi-berlin.mpg.de
WWW: http://www.fhi-berlin.mpg.de/pc/docm-new.html

Physikalische Chemie
The Fritz-Haber-Institut (Physikalische Chemie) offers a
  PhD position in “Terahertz spintronics”
position(s).

The project: Terahertz spintronics

Currently, many research efforts aim at extending conventional electronics (which is based on the charge of the electron) by the electron’s spin degree of freedom. Elementary operations of such spin-based electronics (spintronics) are the reorientation and transport of spins in space. They should proceed as fast as possible.

The goal of this project is to measure, understand and finally control spin dynamics in solids at extremely high, that is, terahertz frequencies. In the course of this work, stimuli and probes based on terahertz electromagnetic transients and femtosecond laser pulses will be developed. New applications will emerge, e.g. efficient broadband emitters of terahertz radiation.

You have
• An excellent master’s degree in physics or related subject
• Background in solid-state physics (e.g. magnetism) and/or ultrafast laser spectroscopy

You get
• Exciting research in a dynamic Max Planck group located in the Berlin science area
• Excellent supervision and education, including the International Max Planck Research School

How to apply? Please mail us
• Your scientific CV and university certificates with marks
• A motivation letter (max. 1 page) why you want to join the group. Only applications with this motivation will receive our full attention.

The Terahertz Physics Group
• Makes use of cutting-edge ultrafast terahertz technology to reveal and control new ultrafast processes in condensed matter
• Develops novel schemes for the efficient generation, detection and manipulation of electromagnetic pulses in the highly unexplored terahertz frequency window

Contact:
Tobias Kampfrath
Email: kampfrath@fhi-berlin.mpg.de
Terahertz Physics Group Homepage: http://www.fhi-berlin.mpg.de/pc/KAMPFRATH/welcome.html
Fritz Haber Institute of the Max Planck Society
Berlin, Germany



Impressum Datenschutzerklärung • © FHI
Tue, 6. Oct 2015
Address: Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
Tel: +49 30 8413 30