Tunable polaronic conduction in anatase TiO2

Oxygen vacancies created in anatase TiO(2) 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...

Full description

Saved in:

Bibliographic Details
Published in:	Physical review letters Vol. 110; no. 19; p. 196403
Main Authors:	Moser, S, Moreschini, L, Jaćimović, J, Barišić, O S, Berger, H, Magrez, A, Chang, Y J, Kim, K S, Bostwick, A, Rotenberg, E, Forró, L, Grioni, M
Format:	Journal Article
Language:	English
Published:	United States 10-05-2013
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Oxygen vacancies created in anatase TiO(2) 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.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1079-7114
DOI:	10.1103/PhysRevLett.110.196403