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

Research output: Contribution to journal › Article › peer-review

270 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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doi = "10.1103/PhysRevLett.110.196403",

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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

N2 - 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.

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.

UR - https://www.scopus.com/pages/publications/84877359093

U2 - 10.1103/PhysRevLett.110.196403

DO - 10.1103/PhysRevLett.110.196403

M3 - Article

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SN - 0031-9007

VL - 110

JO - Physical Review Letters

JF - Physical Review Letters

IS - 19

M1 - 196403

ER -

Tunable polaronic conduction in anatase TiO₂

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