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The evolution of pairing correlation in the anisotropic triangular lattice

Author

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  • Jingyao Wang

    (Department of Physics, Beijing Normal University, 19 Xinjiekou Outer St, BeiTaiPingZhuang, Haidian Qu, Beijing 100875, P. R. China)

  • Yamei Zeng

    (Department of Physics, Beijing Normal University, 19 Xinjiekou Outer St, BeiTaiPingZhuang, Haidian Qu, Beijing 100875, P. R. China)

  • Peng Wang

    (Department of Physics, Beijing Normal University, 19 Xinjiekou Outer St, BeiTaiPingZhuang, Haidian Qu, Beijing 100875, P. R. China)

  • Ying Liang

    (Department of Physics, Beijing Normal University, 19 Xinjiekou Outer St, BeiTaiPingZhuang, Haidian Qu, Beijing 100875, P. R. China)

  • Tianxing Ma

    (Department of Physics, Beijing Normal University, 19 Xinjiekou Outer St, BeiTaiPingZhuang, Haidian Qu, Beijing 100875, P. R. China)

Abstract

By using the determined quantum Monte Carlo method, we explore the evolution of the pairing correlation depending on doping and frustration in the two-dimensional Hubbard model on an anisotropic triangular lattice. In the full frustrated system where the nearest hoping term t is equal to the next nearest hoping t′, the dxy-wave pairing dominates over dx2−y2 as the electron filling 〈n〉>1.20. The dx2−y2 superconducting pairing tends to be dominated as the frustration t′∕t decreases, and the decreasing electron fillings also push the system into a possible dx2−y2 superconducting state. Our intensive nonbiased numerical results reveal the competition between dx2−y2 and dxy superconducting pairing states, clarifying the different pairing symmetries in the κ-(BEDT-TTF)2X family of organic charge transfer salts.

Suggested Citation

  • Jingyao Wang & Yamei Zeng & Peng Wang & Ying Liang & Tianxing Ma, 2017. "The evolution of pairing correlation in the anisotropic triangular lattice," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 28(10), pages 1-9, October.
    • Handle: RePEc:wsi:ijmpcx:v:28:y:2017:i:10:n:s0129183117501273
    DOI: 10.1142/S0129183117501273
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