Hubbard band versus oxygen vacancy states in the correlated electron metal SrVO3

S. Backes, T. C. Rödel, F. Fortuna, E. Frantzeskakis, P. Le Fèvre, F. Bertran, M. Kobayashi, R. Yukawa, T. Mitsuhashi, M. Kitamura, K. Horiba, H. Kumigashira, R. Saint-Martin, A. Fouchet, B. Berini, Y. Dumont, A. J. Kim, F. Lechermann, Harald Olaf Jeschke, M. J. RozenbergR. Valentí, A. F. Santander-Syro

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We study the effect of oxygen vacancies on the electronic structure of the model strongly correlated metal SrVO3. By means of angle-resolved photoemission spectroscopy (ARPES) synchrotron experiments, we investigate the systematic effect of the UV dose on the measured spectra. We observe the onset of a spurious dose-dependent prominent peak at an energy range where the lower Hubbard band has been previously reported in this compound, raising questions on its previous interpretation. By a careful analysis of the dose-dependent effects we succeed in disentangling the contributions coming from the oxygen vacancy states and from the lower Hubbard band. We obtain the ARPES spectrum in the limit of a negligible concentration of vacancies, where a clear signal of a lower Hubbard band remains. We support our study by means of state-of-the-art ab initio calculations that include correlation effects and the presence of oxygen vacancies. Our results underscore the relevance of potential spurious states affecting ARPES experiments in correlated metals, which are associated with the ubiquitous oxygen vacancies as extensively reported in the context of a two-dimensional electron gas at the surface of insulating d0 transition metal oxides.

Original languageEnglish
Article number241110
JournalPhysical Review B
Volume94
Issue number24
DOIs
Publication statusPublished - Dec 19 2016
Externally publishedYes

Fingerprint

Oxygen vacancies
Photoelectron spectroscopy
Metals
Electrons
oxygen
photoelectric emission
metals
electrons
dosage
Two dimensional electron gas
spectroscopy
Synchrotrons
Oxides
Vacancies
Electronic structure
Transition metals
Experiments
metal oxides
electron gas
synchrotrons

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Backes, S., Rödel, T. C., Fortuna, F., Frantzeskakis, E., Le Fèvre, P., Bertran, F., ... Santander-Syro, A. F. (2016). Hubbard band versus oxygen vacancy states in the correlated electron metal SrVO3. Physical Review B, 94(24), [241110]. https://doi.org/10.1103/PhysRevB.94.241110

Hubbard band versus oxygen vacancy states in the correlated electron metal SrVO3. / Backes, S.; Rödel, T. C.; Fortuna, F.; Frantzeskakis, E.; Le Fèvre, P.; Bertran, F.; Kobayashi, M.; Yukawa, R.; Mitsuhashi, T.; Kitamura, M.; Horiba, K.; Kumigashira, H.; Saint-Martin, R.; Fouchet, A.; Berini, B.; Dumont, Y.; Kim, A. J.; Lechermann, F.; Jeschke, Harald Olaf; Rozenberg, M. J.; Valentí, R.; Santander-Syro, A. F.

In: Physical Review B, Vol. 94, No. 24, 241110, 19.12.2016.

Research output: Contribution to journalArticle

Backes, S, Rödel, TC, Fortuna, F, Frantzeskakis, E, Le Fèvre, P, Bertran, F, Kobayashi, M, Yukawa, R, Mitsuhashi, T, Kitamura, M, Horiba, K, Kumigashira, H, Saint-Martin, R, Fouchet, A, Berini, B, Dumont, Y, Kim, AJ, Lechermann, F, Jeschke, HO, Rozenberg, MJ, Valentí, R & Santander-Syro, AF 2016, 'Hubbard band versus oxygen vacancy states in the correlated electron metal SrVO3', Physical Review B, vol. 94, no. 24, 241110. https://doi.org/10.1103/PhysRevB.94.241110
Backes S, Rödel TC, Fortuna F, Frantzeskakis E, Le Fèvre P, Bertran F et al. Hubbard band versus oxygen vacancy states in the correlated electron metal SrVO3. Physical Review B. 2016 Dec 19;94(24). 241110. https://doi.org/10.1103/PhysRevB.94.241110
Backes, S. ; Rödel, T. C. ; Fortuna, F. ; Frantzeskakis, E. ; Le Fèvre, P. ; Bertran, F. ; Kobayashi, M. ; Yukawa, R. ; Mitsuhashi, T. ; Kitamura, M. ; Horiba, K. ; Kumigashira, H. ; Saint-Martin, R. ; Fouchet, A. ; Berini, B. ; Dumont, Y. ; Kim, A. J. ; Lechermann, F. ; Jeschke, Harald Olaf ; Rozenberg, M. J. ; Valentí, R. ; Santander-Syro, A. F. / Hubbard band versus oxygen vacancy states in the correlated electron metal SrVO3. In: Physical Review B. 2016 ; Vol. 94, No. 24.
@article{4b68608caffa48b88257da705a5a0eee,
title = "Hubbard band versus oxygen vacancy states in the correlated electron metal SrVO3",
abstract = "We study the effect of oxygen vacancies on the electronic structure of the model strongly correlated metal SrVO3. By means of angle-resolved photoemission spectroscopy (ARPES) synchrotron experiments, we investigate the systematic effect of the UV dose on the measured spectra. We observe the onset of a spurious dose-dependent prominent peak at an energy range where the lower Hubbard band has been previously reported in this compound, raising questions on its previous interpretation. By a careful analysis of the dose-dependent effects we succeed in disentangling the contributions coming from the oxygen vacancy states and from the lower Hubbard band. We obtain the ARPES spectrum in the limit of a negligible concentration of vacancies, where a clear signal of a lower Hubbard band remains. We support our study by means of state-of-the-art ab initio calculations that include correlation effects and the presence of oxygen vacancies. Our results underscore the relevance of potential spurious states affecting ARPES experiments in correlated metals, which are associated with the ubiquitous oxygen vacancies as extensively reported in the context of a two-dimensional electron gas at the surface of insulating d0 transition metal oxides.",
author = "S. Backes and R{\"o}del, {T. C.} and F. Fortuna and E. Frantzeskakis and {Le F{\`e}vre}, P. and F. Bertran and M. Kobayashi and R. Yukawa and T. Mitsuhashi and M. Kitamura and K. Horiba and H. Kumigashira and R. Saint-Martin and A. Fouchet and B. Berini and Y. Dumont and Kim, {A. J.} and F. Lechermann and Jeschke, {Harald Olaf} and Rozenberg, {M. J.} and R. Valent{\'i} and Santander-Syro, {A. F.}",
year = "2016",
month = "12",
day = "19",
doi = "10.1103/PhysRevB.94.241110",
language = "English",
volume = "94",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "24",

}

TY - JOUR

T1 - Hubbard band versus oxygen vacancy states in the correlated electron metal SrVO3

AU - Backes, S.

AU - Rödel, T. C.

AU - Fortuna, F.

AU - Frantzeskakis, E.

AU - Le Fèvre, P.

AU - Bertran, F.

AU - Kobayashi, M.

AU - Yukawa, R.

AU - Mitsuhashi, T.

AU - Kitamura, M.

AU - Horiba, K.

AU - Kumigashira, H.

AU - Saint-Martin, R.

AU - Fouchet, A.

AU - Berini, B.

AU - Dumont, Y.

AU - Kim, A. J.

AU - Lechermann, F.

AU - Jeschke, Harald Olaf

AU - Rozenberg, M. J.

AU - Valentí, R.

AU - Santander-Syro, A. F.

PY - 2016/12/19

Y1 - 2016/12/19

N2 - We study the effect of oxygen vacancies on the electronic structure of the model strongly correlated metal SrVO3. By means of angle-resolved photoemission spectroscopy (ARPES) synchrotron experiments, we investigate the systematic effect of the UV dose on the measured spectra. We observe the onset of a spurious dose-dependent prominent peak at an energy range where the lower Hubbard band has been previously reported in this compound, raising questions on its previous interpretation. By a careful analysis of the dose-dependent effects we succeed in disentangling the contributions coming from the oxygen vacancy states and from the lower Hubbard band. We obtain the ARPES spectrum in the limit of a negligible concentration of vacancies, where a clear signal of a lower Hubbard band remains. We support our study by means of state-of-the-art ab initio calculations that include correlation effects and the presence of oxygen vacancies. Our results underscore the relevance of potential spurious states affecting ARPES experiments in correlated metals, which are associated with the ubiquitous oxygen vacancies as extensively reported in the context of a two-dimensional electron gas at the surface of insulating d0 transition metal oxides.

AB - We study the effect of oxygen vacancies on the electronic structure of the model strongly correlated metal SrVO3. By means of angle-resolved photoemission spectroscopy (ARPES) synchrotron experiments, we investigate the systematic effect of the UV dose on the measured spectra. We observe the onset of a spurious dose-dependent prominent peak at an energy range where the lower Hubbard band has been previously reported in this compound, raising questions on its previous interpretation. By a careful analysis of the dose-dependent effects we succeed in disentangling the contributions coming from the oxygen vacancy states and from the lower Hubbard band. We obtain the ARPES spectrum in the limit of a negligible concentration of vacancies, where a clear signal of a lower Hubbard band remains. We support our study by means of state-of-the-art ab initio calculations that include correlation effects and the presence of oxygen vacancies. Our results underscore the relevance of potential spurious states affecting ARPES experiments in correlated metals, which are associated with the ubiquitous oxygen vacancies as extensively reported in the context of a two-dimensional electron gas at the surface of insulating d0 transition metal oxides.

UR - http://www.scopus.com/inward/record.url?scp=85009749066&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85009749066&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.94.241110

DO - 10.1103/PhysRevB.94.241110

M3 - Article

AN - SCOPUS:85009749066

VL - 94

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 24

M1 - 241110

ER -