Tunable Polaronic Conduction in Anatase TiO2

被引：240

作者：

Moser, S. ^{[1
,2
]}

Moreschini, L. ^{[1
]}

Jacimovic, J. ^{[2
]}

Barisic, O. S. ^{[3
]}

Berger, H. ^{[2
]}

Magrez, A. ^{[2
]}

Chang, Y. J. ^{[1
,4
]}

Kim, K. S. ^{[1
]}

Bostwick, A. ^{[1
]}

Rotenberg, E. ^{[1
]}

Forro, L. ^{[2
]}

Grioni, M. ^{[2
]}

机构：

[1] ALS, Berkeley, CA 94720 USA

[2] Ecole Polytech Fed Lausanne, Inst Phys Nanostruct, CH-1015 Lausanne, Switzerland

[3] Inst Phys, HR-10000 Zagreb, Croatia

[4] Univ Seoul, Dept Phys, Seoul 130743, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 19期

基金：

瑞士国家科学基金会;

关键词：

SINGLE-CRYSTALS; SOLAR-CELLS; TRANSPORT; SEMICONDUCTOR; MANGANITES; SURFACE; LIQUID; SRTIO3; WATER;

D O I：

10.1103/PhysRevLett.110.196403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：5

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