Tunable Polaronic Conduction in Anatase TiO2

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.


Published in:
Phys. Rev. Lett., 110, 19, 196403
Year:
2013
Publisher:
College Pk, Amer Physical Soc
Laboratories:




 Record created 2013-05-10, last modified 2018-03-18

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