Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2012-02-02
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4.5 pages, 4 figures
Scientific paper
The effective mass and superfluidity-normal phase transition temperature of magnetoexcitons in topological insulator bilayers are theoretically investigated. The intra-Landau-level Coulomb interaction is treated perturbatively, from which the effective magnetoexciton mass is analytically discussed. The inclusion of inter-Landau-level Coulomb interaction by more exact numerical diagonalization of the Hamiltonian brings out important modifications to magnetoexciton properties, which are specially charaterized by prominent reduction in the magnetoexciton effective mass and promotion in the superfluidity-normal phase transition temperature at a wide range of external parameters.
Fu Zhen-Guo
Wang Zhigang
Zhang Ping
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