Self-energy determination and electron–phonon coupling on Bi(110)

Abstract

The electron–phonon coupling strength for two different surface states on Bi(110) close to the Fermi level is determined by measuring the energy- and temperature-dependent imaginary part of the self-energy and fitting it to different models of the phonon spectrum. For the hole pockets near the and points, the electron–phonon mass enhancement parameter λ is found to be 0.19(3) and 0.27(2), respectively.