M.D. Watson, Y. Feng, C.W. Nicholson, C. Monney, J.M. Riley, H. Iwasawa, K. Refson, V. Sacksteder, D.T. Adroja, J. Zhao, and M. Hoesch:
Phys. Rev. Lett. 118 (9), 097002 (2017), pp.6;
We present angle-resolved photoemission spectroscopy measurements of the quasi-one-dimensional superconductor K2Cr3As3. We find that the Fermi surface contains two Fermi surface sheets, with linearly dispersing bands not displaying any significant band renormalizations. The one-dimensional band dispersions display a suppression of spectral intensity approaching the Fermi level according to a linear power law, over an energy range of ˜200 meV. This is interpreted as a signature of Tomonoga-Luttinger liquid physics, which provides a new perspective on the possibly unconventional superconductivity in this family of compounds.
The original publication is available by link DOI: 10.1103/PhysRevLett.118.097002