Surface Tomonaga-Luttinger liquid state on Bi/InSb(001)

Abstract

A 1D metallic surface state was created on an anisotropic InSb(001) surface covered with Bi. Angle-resolved photoelectron spectroscopy (ARPES) showed a 1D Fermi contour with almost no 2D distortion. Close to the Fermi level ($E_{\mathrm{F}}$), the angle-integrated photoelectron spectra showed power-law scaling with the binding energy and temperature. The ARPES plot above $E_{\mathrm{F}}$ obtained thanks to thermally broadened Fermi edge at room temperature showed a 1D state with continuous metallic dispersion across $E_{\mathrm{F}}$ and power-law intensity suppression around $E_{\mathrm{F}}$. These results strongly suggest a Tomonaga-Luttinger liquid on the Bi/InSb(001) surface.

12 pages (4 figures) for main text, 5 pages (6 figures) for supplemental material

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