Origin of the pseudogap and its influence on superconducting state

Details Origin of the pseudogap and its influence on superconducting state Origin of the pseudogap and its influence on superconducting state

2010-11-16

arxiv.org/abs/1011.3734v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures

Scientific paper

When holes move in the background of strong antiferromagnetic correlation, two spatial scales emerge which lead to a much reduced hopping integral with an additional phase factor. By taking these two effects into consideration, we propose an effective Hamiltonian to investigate pseudogap in cuprates. We argue that pseudogap is the consequence of dressed hole moving in the antiferromagnetic background and has nothing to do with the superconductivity. In the normal state, The pseudogap opens near the antinodal region and vanishes around the nodal region. In the superconducting state, the d-wave superconducting gap dominates the nodal region, while the pseudogap dominates the antinodal region. A two-gap scenario is concluded to describe the relation between the two gaps.

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