Vortex Structure in Underdoped Cuprates

Abstract

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.

9 pages, 4 figures

References in corpus (2)

• STM Studies of the Electronic Structure of Vortex Cores in Bi2Sr2CaCu2O8+d
• Fractionalization, topological order, and cuprate superconductivity

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