Intersubband excitations at finite temperatures and their roles in different quasi-one-dimensional systems
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Data
2006-06-01
Autores
Tavares, Marcos R. S. [UNESP]
Hai, Guo-Qiang
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Física
Resumo
We theoretically study many-body excitations in three different quasi-one-dimensional (Q1D) electron systems: (i) those formed on the surface of liquid Helium; (ii) in two coupled semiconductor quantum wires; and (iii) Q1D electrons embedded in polar semiconductor-based quantum wires. Our results show intersubband coupling between higher subbands and the two lowest subbands affecting even the lower energy intersubband plasmons on the liquid Helium surface. Concerning the second system, we show a pronounced extra peak appearing in the intersubband impurity spectral function for temperatures as high as 20 K. We finally show coupled intersubband plasmon-phonon modes surviving for temperatures up to 300 K.
Descrição
Palavras-chave
Intersubband excitations, Many-body excitations, Quasi-one-dimensional (Q1D) electron systems
Como citar
Brazilian Journal of Physics. Sociedade Brasileira de Física, v. 36, n. 2a, p. 415-418, 2006.