نتایج جستجو برای: polaronic and bipolaronic forms

تعداد نتایج: 16844827  

Journal: :Physical review letters 2013
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

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...

Journal: :physica status solidi (b) 2003

Journal: :Superlattices and Microstructures 2008

Journal: :Physical review letters 2016
P G Lustemberg Y Pan B-J Shaw D Grinter Chi Pang G Thornton Rubén Pérez M V Ganduglia-Pirovano N Nilius

Surface defects are believed to govern the adsorption behavior of reducible oxides. We challenge this perception on the basis of a combined scanning-tunneling-microscopy and density-functional-theory study, addressing the Au adsorption on reduced CeO_{2-x}(111). Despite a clear thermodynamic preference for oxygen vacancies, individual Au atoms were found to bind mostly to regular surface sites....

2016
A. Kavokin A. V. KAVOKIN

The calculation of the radiative lifetime of a localized exciton confined in a quantum we11 is performed for CdTe/(Cd.hln)Te structure where the quasi-free exciton magnetic polaron can be formed. There is shown that the polaron induced squeezing of the in-plkne esciton localization radius leads to the increase of the lifetime. The lifetime dependence on the quantum well width is found to be alt...

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