Physics – Condensed Matter – Superconductivity
Scientific paper
2002-03-13
Phys. Rev. B 66, 104501 (2002).
Physics
Condensed Matter
Superconductivity
4 pages, 9 figures, to be published in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.66.104501
The nature of spin density wave (SDW) and charge density wave (CDW) in the mixed state of high T_c superconductors (HTS) is investigated by using the self-consistent Bogoliubov-de Gennes equations and an effective model Hamiltonian with competing SDW and d-wave superconductivity interactions. We show that there exists a critical onsite Coulomb interaction U_c. For optimally doped sample, a two dimensional SDW and CDW modulations are induced for U < U_c while SDW and CDW orders become antiferromagnetic (AF) and charge stripes for U > U_c. These stripe orders are stabilized and enhanced near the vortex cores. The wavelengths of the AF stripes and charge stripes are found respectively to be 8 a and 4 a with a as the lattice constant. We show that our results could be applied to understand several recent experiments on HTS.
Chen Hai-Yan
Chen Yan
Ting Samuel C. C.
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