Photoinduced superconducting states in strongly correlated electron systems

被引：15
|
作者：
Takahashi, A [1 ]
Gomi, H [1 ]
Aihara, M [1 ]
机构：
[1] Nara Inst Sci & Technol, Grad Sch Mat Sci, Nara 6300101, Japan
来源：
PHYSICAL REVIEW B | 2002年 / 66卷 / 11期
关键词：
D O I：
10.1103/PhysRevB.66.115103
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We theoretically investigate the properties of multiphoton excited states in strongly correlated two-dimensional electron systems. The effective Hamiltonian of the Hubbard model for the multiphoton excited states is derived assuming strong Coulomb repulsion. Diagonalizing the effective Hamiltonian exactly, the lowest energy state in two-photon excited manifold is calculated in the 20 site two-dimensional square lattice at half filling. Analysis of correlation functions suggests that the antiferromagnetic spin order characteristic of the half filled ground state is destroyed by two-photon excitation, and two different d-wave superconducting states and a spiral spin state are photogenerated.
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页码：1 / 7
页数：7
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