BROWSE

Related Scientist

Researcher

강상관계 물질 연구단
강상관계 물질 연구단
more info

Volatile two-dimensional electron gas in ultrathin BaTiO3 films

Cited 0 time in webofscience Cited 0 time in scopus
18 Viewed 2 Downloaded
Title
Volatile two-dimensional electron gas in ultrathin BaTiO3 films
Author(s)
Lutz P.; Moser S.; Jovic V.; Chang Y.J.; Koch R.J.; Ulstrup S.; Ji Seop Oh; Moreschini L.; Fatale S.; Grioni M.; Jozwiak C.; Bostwick A.; Rotenberg E.; Bentmann H.; Reinert F.
Publication Date
2018-09
Journal
Physical Review Materials, v.2, no.9, pp.094411-1 - 094411-5
Publisher
AMER PHYSICAL SOC
Abstract
We investigate the metallic surface state in ultrathin films of BaTiO3 by angle-resolved photoemission spectroscopy. We find Fermi-surface contours derived from the Ti 3dt2g conduction band, similar as in SrTiO3 but with broader spectral features due to enhanced quasiparticle scattering. Oxygen vacancies created in the x-ray beam spot allow for reversible in situ doping control up to surface carrier densities as high as 1014cm-2, but vacancy migration into the subsurface at T��285K quenches the surface state. Our analysis suggests that the charge state of oxygen vacancies in ultrathin films is predominantly 2+, which limits charge-carrier trapping and the formation of localized defect states. ? 2018 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/5431
ISSN
2475-9953
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
Files in This Item:
PhysRevMaterials.2.094411.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse