Tunable polaronic conduction in anatase TiO2

S. Moser, L. Moreschini, J. Jaćimović, O. S. Barišić, H. Berger, A. Magrez, Y. J. Chang, Keun Su Kim, A. Bostwick, E. Rotenberg, L. Forró, M. Grioni

Research output: Contribution to journalArticle

113 Citations (Scopus)

Abstract

Oxygen vacancies created in anatase TiO2 by UV photons (80-130 eV) provide an effective electron-doping mechanism and induce a hitherto unobserved dispersive metallic state. Angle resolved photoemission reveals that the quasiparticles are large polarons. These results indicate that anatase can be tuned from an insulator to a polaron gas to a weakly correlated metal as a function of doping and clarify the nature of conductivity in this material.

Original languageEnglish
Article number196403
JournalPhysical Review Letters
Volume110
Issue number19
DOIs
Publication statusPublished - 2013 May 7

Fingerprint

anatase
conduction
polarons
photoelectric emission
insulators
conductivity
photons
oxygen
gases
metals
electrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Moser, S., Moreschini, L., Jaćimović, J., Barišić, O. S., Berger, H., Magrez, A., ... Grioni, M. (2013). Tunable polaronic conduction in anatase TiO2. Physical Review Letters, 110(19), [196403]. https://doi.org/10.1103/PhysRevLett.110.196403
Moser, S. ; Moreschini, L. ; Jaćimović, J. ; Barišić, O. S. ; Berger, H. ; Magrez, A. ; Chang, Y. J. ; Kim, Keun Su ; Bostwick, A. ; Rotenberg, E. ; Forró, L. ; Grioni, M. / Tunable polaronic conduction in anatase TiO2. In: Physical Review Letters. 2013 ; Vol. 110, No. 19.
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Moser, S, Moreschini, L, Jaćimović, J, Barišić, OS, Berger, H, Magrez, A, Chang, YJ, Kim, KS, Bostwick, A, Rotenberg, E, Forró, L & Grioni, M 2013, 'Tunable polaronic conduction in anatase TiO2', Physical Review Letters, vol. 110, no. 19, 196403. https://doi.org/10.1103/PhysRevLett.110.196403

Tunable polaronic conduction in anatase TiO2. / Moser, S.; Moreschini, L.; Jaćimović, J.; Barišić, O. S.; Berger, H.; Magrez, A.; Chang, Y. J.; Kim, Keun Su; Bostwick, A.; Rotenberg, E.; Forró, L.; Grioni, M.

In: Physical Review Letters, Vol. 110, No. 19, 196403, 07.05.2013.

Research output: Contribution to journalArticle

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T1 - Tunable polaronic conduction in anatase TiO2

AU - Moser, S.

AU - Moreschini, L.

AU - Jaćimović, J.

AU - Barišić, O. S.

AU - Berger, H.

AU - Magrez, A.

AU - Chang, Y. J.

AU - Kim, Keun Su

AU - Bostwick, A.

AU - Rotenberg, E.

AU - Forró, L.

AU - Grioni, M.

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AB - Oxygen vacancies created in anatase TiO2 by UV photons (80-130 eV) provide an effective electron-doping mechanism and induce a hitherto unobserved dispersive metallic state. Angle resolved photoemission reveals that the quasiparticles are large polarons. These results indicate that anatase can be tuned from an insulator to a polaron gas to a weakly correlated metal as a function of doping and clarify the nature of conductivity in this material.

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Moser S, Moreschini L, Jaćimović J, Barišić OS, Berger H, Magrez A et al. Tunable polaronic conduction in anatase TiO2. Physical Review Letters. 2013 May 7;110(19). 196403. https://doi.org/10.1103/PhysRevLett.110.196403