Unidirectional d-wave superconducting domains in the two-dimensional t-J model

Raczkowski, M.; Capello, M.; Poilblanc, D.; Fresard, R.; Oleś, A. M.

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Unidirectional d-wave superconducting domains in the two-dimensional t-J model

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Oleś, A. M.
Department Quantum Many-Body Theory (Walter Metzner), Max Planck Institute for Solid State Research, Max Planck Society;

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Raczkowski, M., Capello, M., Poilblanc, D., Fresard, R., & Oleś, A. M. (2007). Unidirectional d-wave superconducting domains in the two-dimensional t-J model. Physical Review B, 76(14): 140505.

Cite as: https://hdl.handle.net/21.11116/0000-000E-B5AE-2

Abstract

Motivated by the recently observed pattern of unidirectional domains in high-T-c superconductors [Y. Kohsaka , Science 315, 1380 (2007)], we investigate the emergence of spontaneous modulations in the d-wave superconducting resonating valence bond phase using the t-J model at x=1/8 doping. Half-filled charge domains separated by four lattice spacings are found to form along one of the crystal axes, leading to modulated superconductivity with out-of-phase d-wave order parameters in neighboring domains. Both renormalized mean-field theory and variational Monte Carlo calculations reveal that the energies of modulated and uniform phases are very close to each other.