Metastable electron-pair states in a two-dimensional crystal

Autor(es)

Hai, G-Q ^[1] ; Castelano, L. K. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHYSICS-CONDENSED MATTER; v. 26, n. 11 MAR 19 2014.
• Citações Web of Science: 4

Resumo

We study possible quantum states of two correlated electrons in a two-dimensional periodic potential and find a metastable energy band of electron pairs between the two lowest single-electron bands. These metastable states result from interplay of the electron-electron Coulomb interaction and the strength of the crystal potential. The paired electrons are bound in the same unit cell in relative coordinates with an average distance between them of approximately one third of the crystal period. Furthermore, we discuss how such electron pairs can possibly be stabilized in a many-electron system. (AU)

• Processo FAPESP: 12/13052-6 - Propriedades de transporte e computação quântica em nanoestruturas
• Beneficiário: Leonardo Kleber Castelano
• Linha de fomento: Auxílio à Pesquisa - Regular