Vortex Structure in Underdoped Cuprates

Details Vortex Structure in Underdoped Cuprates Vortex Structure in Underdoped Cuprates

2000-08-29

arxiv.org/abs/cond-mat/0008419v1

Phys. Rev. B, 63, 224517 (2001)

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 4 figures

Scientific paper

10.1103/PhysRevB.63.224517

In underdoped cuprates the normal state is highly anomalous and is characterized as a pseudogap phase. The question of how to describe the ``normal'' core of a superconducting vortex is an outstanding open problem. We show that the SU(2) formulation of the t-J model provides a description of the normal state as well as the vortex core. Interestingly, the pseudogap persists inside the core. We also found that it is likely that the core consists of a state which breaks translational symmetry due to the existence of staggered current which generate staggered magnetic field with very slow dynamics. This staggered flux state is likely to be the ground state for magnetic fields higher than $H_{c2}$. Experiments to test this picture are proposed.

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