Electron-phonon coupling in surface electronic states on Be(101¯0)

Abstract

We present an ab initio study of the electron-phonon interaction in surface electronic states on Be(1010). The calculations based on density-functional theory were carried out using a linear-response approach and a mixed-basis pseudopotential method. It is shown that the strength of the electron-phonon coupling is sensitive to the energy and momentum position of an electronic state and varies from 0.16 to 0.54. The difference in the electron-phonon interaction of two Shockley-type surface states at A can be understood on the basis of their different energy positions in the projected band gap. Previous experiments addressing the electron-phonon coupling strength of these two surface states are discussed in light of our theoretical findings.

Electron-phonon coupling in topological surface states: The role of polar optical modes

“…In particular, phonons and electron-phonon coupling matrix elements are obtained with the efficient linear response technique 29 . This approach has been successfully applied to the renormalization of electronic quasiparticles in bulk 30 , at metal surfaces 31 of spin-orbit split surface states 32 , 33 , and of quantum well states of thin films 34 , 35 .…”

Orbital dependent Rashba splitting and electron-phonon coupling of 2D Bi phase on Cu(100) surface

“…[7][8][9][10] Furthermore, an enhanced electron-phonon coupling may appear for 2D electronic phases at interfaces, if dispersive electronic states offer a large number of decay channels for transitions coupled to surface phonons. 3,4,11,12 All these effects can be rationalized as due to the formation of hybrid interface electronic states with strong surface localization, and thus an ideal 2D character, mainly due to the bonding between metallic states and adsorbate p orbitals. In particular, the formation of highly-dispersive electronic states with almost free-electron like parabolic dispersion is a common feature of 2D systems with high atomic number Z, as observed in Bi/Ag(100), 13 Bi/Ag(111), 1 Bi/Cu(111), 14,15 Sb/Cu(111), 15 Sb/Ag(111), 16 Pb/Ag(111), 2 and Bi/Si(111).…”