Disentangling the surface and bulk electronic structures of LaOFeAs

Autor:	Zhang, P., Ma, J., Qian, T., Shi, Y. G., Fedorov, A. V., Denlinger, J. D., Wu, X. X., Hu, J. P., Richard, P., Ding, H.
Rok vydání:	2016
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Strongly Correlated Electrons
Zdroj:	Phys. Rev. B 94, 104517 (2016)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.94.104517
Popis:	We performed a comprehensive angle-resolved photoemission spectroscopy study of the electronic band structure of LaOFeAs single crystals. We found that samples cleaved at low temperature show an unstable and highly complicated band structure, whereas samples cleaved at high temperature exhibit a stable and clearer electronic structure. Using \emph{in-situ} surface doping with K and supported by first-principles calculations, we identify both surface and bulk bands. Our assignments are confirmed by the difference in the temperature dependence of the bulk and surface states. Comment: 5 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1606.01033 Zobrazit plný text záznamu View this record from Arxiv