Paring From Strong Repulsion in Triangular Lattice Hubbard Model
ORAL
Abstract
We propose a paring mechanism between holes in the dilute limit of doped frustrated Mott insulators. Hole pairing arises from a hole-hole-magnon three-body bound state. This pairing mechanism has its roots on single-hole kinetic energy frustration, which favors antiferromagnetic (AFM) correlations around the hole. We demonstrate that the AFM polaron (hole-magnon bound state) produced by a single-hole propagating on a field-induced polarized background is strong enough to bind a a second hole. The effective interaction between these three-body bound states is repulsive, implying that this pairing mechanism is relevant for superconductivity.
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Presenters
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Shang-Shun Zhang
Univ of Tennessee, Knoxville
Authors
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Shang-Shun Zhang
Univ of Tennessee, Knoxville
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Wei Zhu
Los Alamos National Laboratory, LOS ALAMOS NATIONAL LABORATORY
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Cristian Batista
Department of Physics and Astronomy, Univ of Tennessee, Knoxville, Univ of Tennessee, Knoxville, Department of Physics and Astronomy, The University of Tennessee, University of Tennessee, Physics, University of Tennessee, The University of Tennessee, Department of Phys., Univ. of Tennessee, U. Tennessee, Knoxville, University of Tennessee, Knoxville