Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2008-10-02
Journal of Physics:Condensed Matter 20, 425224 (2008)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Scientific paper
10.1088/0953-8984/20/42/425224
In the presence of spin-orbit coupling and inversion symmetry of the lateral confinement potential a single electron does not exhibit matrix Berry phases in quasi-two-dimensional semiconductor quantum dots. In such a system we investigate whether many-body correlation effects can lead to finite matrix Berry phases. We find that the transformation properties of many-electron wavefunctions under two-dimensional inversion operation do not allow finite matrix Berry phases. This effect is exact and is independent of the form of electron-electron interactions. On the other hand, quasi-two-dimensional semiconductor quantum dots with lateral confinement potential without inversion symmetry can have finite matrix Berry phases. We find that many-body quantum fluctuations can change matrix Berry phases significantly in such systems.
Eric Yang S.-R.
Hwang Nak Yeon
Kim Chang Sub
Kim Jin Young
Park Poo-Sung
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