Disentangling the surface and bulk electronic structures of LaOFeAs

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.

doi:10.1103/PhysRevB.94.104517

Title: Disentangling the surface and bulk electronic structures of LaOFeAs

Journal Article · Tue Sep 20 00:00:00 EDT 2016 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.94.104517· OSTI ID:1393076

Zhang, P. ^[1]; Ma, J. ^[1]; Qian, T. ^[2]; Shi, Y. G. ^[1]; Fedorov, A. V. ^[3]; Denlinger, J. D. ^[3]; Wu, X. X. ^[1]; Hu, J. P. ^[4]; Richard, P. ^[2]; Ding, H. ^[2]

Chinese Academy of Sciences (CAS), Beijing (China)
Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China); Purdue Univ., West Lafayette, IN (United States)

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 very complicated band structure, whereas samples cleaved at high temperature exhibit a stable and clearer electronic structure. Using 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.

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Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1393076

Alternate ID(s):: OSTI ID: 1325612

Journal Information:: Physical Review B, Vol. 94, Issue 10; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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