Tunable polaronic conduction in anatase TiO2

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

doi:10.1103/PhysRevLett.110.196403

Tunable polaronic conduction in anatase TiO₂

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

Department of Physics

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240 Scopus citations

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 language	English
Article number	196403
Journal	Physical Review Letters
Volume	110
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevLett.110.196403
State	Published - 7 May 2013

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10.1103/PhysRevLett.110.196403

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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.",

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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, K. S.

AU - Bostwick, A.

AU - Rotenberg, E.

AU - Forró, L.

AU - Grioni, M.

PY - 2013/5/7

Y1 - 2013/5/7

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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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ER -

Tunable polaronic conduction in anatase TiO₂

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