Upper critical field for underdoped high-T_c superconductors. Pseudogap and stripe--phase

Details Upper critical field for underdoped high-T_c superconductors. Pseudogap and stripe--phase Upper critical field for underdoped high-T_c superconductors. Pseudogap and stripe--phase

2001-12-19

arxiv.org/abs/cond-mat/0112352v1

Phys. Rev. B 66, 214527 (2002)

Physics

Condensed Matter

Superconductivity

7 pages, 5 figures

Scientific paper

10.1103/PhysRevB.66.214527

We investigate the upper critical field in a stripe--phase and in the presence of a phenomenological pseudogap. Our results indicate that the formation of stripes affects the Landau orbits and results in an enhancement of $H_{c2}$. On the other hand, phenomenologically introduced pseudogap leads to a reduction of the upper critical field. This effect is of particular importance when the magnitude of the gap is of the order of the superconducting transition temperature. We have found that a suppression of the upper critical field takes place also for the gap that originates from the charge--density waves.

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