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物理学报. 2009, 58(6): 4189-4193.
doi: 10.7498/aps.58.4189.
欠掺杂高温超导体中的涡旋电荷结构相变
- 收稿日期: 2008-07-04
- 修回日期: 2008-11-28
- 刊出日期: 2009-03-05
English Abstract
Transation of charged vortex structures in underdoped high-temperature superconductors
- Received Date:
04 July 2008
- Accepted Date:
28 November 2008
- Published Online:
05 March 2009
Abstract: Vortex structures in high-temperature superconductors are studied by solving Bogoliubov-de Gennes equations based on a mean-field t-t′-U-V-Vc model. The results show that transition from checkerboard pattern to stripe structure for spin density wave, charge density wave, and d-wave orderings may occur by enhancing the strength of the on-site repulsion U. When a reasonable long-range Coulomb interaction is introduced into the model Hamiltonian, two-dimensional modulations or the checkerboard patterns may appear for the underdoped samples, which is consistent with the scanning-tunneling-microscopy experiments.
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