Open AccessAdlayer influence on Dirac-type surface state at W(110)
Author(s) -
Pascal Jona Grenz,
Danny Thonig,
Marcel Holtmann,
Koji Miyamoto,
Sanjay Kumar,
Eike F. Schwier,
Takashi Okuda,
Jürgen Henk,
M. Donath
Publication year - 2021
Publication title -
journal of physics. condensed matter
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 228
eISSN - 1361-648X
pISSN - 0953-8984
DOI - 10.1088/1361-648x/abfdf3
Subject(s) - x ray photoelectron spectroscopy , surface (topology) , dirac (video compression format) , relaxation (psychology) , surface states , binding energy , surface energy , chemistry , atomic physics , state (computer science) , spectroscopy , condensed matter physics , materials science , physics , nuclear magnetic resonance , quantum mechanics , geometry , psychology , social psychology , mathematics , neutrino , algorithm , computer science
In a combined experimental and theoretical study, we investigated how Fe and Co adlayers on W(110) affect the Dirac-type surface state (DSS). Angle-resolved photoelectron spectroscopy data show an increase in binding energy of 75 meV and 107 meV for Fe and Co, respectively. In order to identify the origin of the energy shift we performed first-principles calculations of the surface electronic structure. The inward surface relaxation of the uncovered W(110) surface is lifted by the adlayers. This structural change is one reason of the energy shift of the DSS. Furthermore, the Fe and Co adlayers change the surface potential, which results in an additional energy shift of the DSS.