Unusual temperature evolution of band structure of Bi(111) studied by angle-resolved photoemission spectroscopy and density functional theory

Abstract

We have performed angle-resolved photoemission spectroscopy of Bi(111) thin films grown on Si(111), and investigated the evolution of band structure with temperature. We revealed an unexpectedly large temperature variation of the energy dispersion for the Rashba-split surface state and the quantum-well states, as seen in the highly momentum-dependent energy shift as large as 0.1 eV. A comparison of the band dispersion between experiment and first-principles band-structure calculations suggests that the interlayer spacing at the topmost Bi bilayer expands upon temperature increase. The present study provides a new pathway for investigating the interplay between lattice and electronic states through the temperature dependence of band structure.

arXiv comment7 pages, 4 figures

References in corpus (15)

• Topological Insulators
• Topological insulators and superconductors
• Topological Insulators with Inversion Symmetry
• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Topological Insulator Materials
• First direct observation of Spin-textures in Topological Insulators : Spin-resolved ARPES as a probe of topological quantum spin Hall effect and Berry's phase
• Superconductivty without inversion symmetry: MnSi versus CePt_3Si
• Strong spin-orbit splitting on Bi surfaces
• Quantum Spin Hall Effect and Enhanced Magnetic Response by Spin-Orbit Coupling
• One-dimensional Topological Edge States of Bismuth Bilayers
• Stable nontrivial Z2 topology in ultrathin Bi (111) films: a first-principles study
• Field-induced polarisation of Dirac valleys in bismuth
• Direct mapping of the spin-filtered surface bands of a three-dimensional quantum spin Hall insulator
• Thermodynamic evidence for valley-dependent density of states in bulk bismuth
• Giant Anisotropy of Spin-Orbit Splitting at the Bismuth Surface

Cited by in corpus (1)

• Unusual temperature dependence of the band structure associated with local atomic distortion in monolayer 1T'-WTe2