Optical response of relativistic electrons in the polar BiTeI semiconductor.

Lee, J S; Schober, G A H; Bahramy, M S; Murakawa, H; Onose, Y; Arita, R; Nagaosa, N; Tokura, Y

Lee, J S; Schober, G A H; Bahramy, M S; Murakawa, H; Onose, Y; Arita, R; Nagaosa, N; Tokura, Y.

Afiliación

Lee JS; Department of Applied Physics and Quantum Phase Electronics Center (QPEC), University of Tokyo, Tokyo 113-8656, Japan. jsl@gist.ac.kr

Phys Rev Lett ; 107(11): 117401, 2011 Sep 09.

Article en En | MEDLINE | ID: mdl-22026701

RESUMEN

The transitions between the spin-split bands by spin-orbit interaction are relevant to many novel phenomena such as the resonant dynamical magnetoelectric effect and the spin Hall effect. We perform optical spectroscopy measurements combined with first-principles calculations to study these transitions in the recently discovered giant bulk Rashba spin-splitting system BiTeI. Several novel features are observed in the optical spectra of the material including a sharp edge singularity due to the reduced dimensionality of the joint density of states and a systematic doping dependence of the intraband transitions between the Rashba-split branches. These confirm the bulk nature of the Rashba-type splitting in BiTeI and manifest the relativistic nature of the electron dynamics in a solid.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2011 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Estados Unidos

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