Effect of many-body quantum fluctuations on matrix Berry phases of a two-dimensional n-type semiconductor quantum dot
- Authors
- Kim, S. C.; Kim, Y. J.; Park, P. S.; Hwang, N. Y.; Yang, S-R Eric
- Issue Date
- 22-10월-2008
- Publisher
- IOP PUBLISHING LTD
- Citation
- JOURNAL OF PHYSICS-CONDENSED MATTER, v.20, no.42
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF PHYSICS-CONDENSED MATTER
- Volume
- 20
- Number
- 42
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/122547
- DOI
- 10.1088/0953-8984/20/42/425224
- ISSN
- 0953-8984
- Abstract
- 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.
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Collections - College of Science > Department of Physics > 1. Journal Articles
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