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Multiband one-dimensional electronic structure and spectroscopic signature of Tomonoga-Luttinger liquid behavior in K₂Cr₃As₃

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arxiv 1610.04157 v1 pith:DWVO3IIO submitted 2016-10-13 cond-mat.supr-con cond-mat.str-el

Multiband one-dimensional electronic structure and spectroscopic signature of Tomonoga-Luttinger liquid behavior in K₂Cr₃As₃

M. D. Watson , Y. Feng , C. W. Nicholson , C. Monney , J. M. Riley , H. Iwasawa , K. Refson , V. Sacksteder
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D. T. Adroja J. Zhao M. Hoesch
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classification cond-mat.supr-con cond-mat.str-el
keywords fermibandliquidone-dimensionalsignaturesurfacetomonoga-luttingeraccording
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We present Angle-Resolved Photoemission Spectroscopy measurements of the quasi-one dimensional superconductor K$_2$Cr$_3$As$_3$. 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.

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