Numerical study of the transition to stripe phases in high-temperature superconductors under a strong magnetic field

Yan Chen; H. Y. Chen; C. S. Ting

doi:10.1103/PhysRevB.66.104501

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Numerical study of the transition to stripe phases in high-temperature superconductors under a strong magnetic field

Yan Chen, H. Y. Chen, C. S. Ting

DOI 10.1103/PhysRevB.66.104501 · Physical Review B

T1

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Abstract

The nature of the spin density wave (SDW) and charge density wave (CDW) in the mixed state of high-Tc 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 on-site Coulomb interaction Uc. For optimally doped sample, two-dimensional SDW and CDW modulations are induced for U<Uc while SDW and CDW orders become antiferromagnetic (AF) and charge stripes for U>Uc. 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 8a and 4a, with a as the lattice constant. We show that our results could be applied to understand several recent experiments on HTS.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown