Coexistence of Theta(II)-loop-current order with checkerboard d-wave CDW/PDW order in a hot-spot model for cuprate superconductors

Article

关键词: HIGH-TEMPERATURE SUPERCONDUCTOR;    QUANTUM CRITICAL-POINT;    CHARGE-STRIPE ORDER;    SPIN-FERMION MODEL;    PSEUDOGAP STATE;    DENSITY-WAVE;    BI2SR2CACU2O8+DELTA;    YBA2CU3OY;    SYMMETRY;    FIELD;   

DOI  :  10.1103/PhysRevB.93.115144

来源: SCIE

【 摘 要 】

We investigate the strong influence of the Theta(II)-loop-current order on both unidirectional and bidirectional d-wave charge-density-wave/pair-density-wave (CDW/PDW) composite orders along axial momenta (+/- Q(0), 0) and (0, +/- Q(0)) that emerge in an effective hot-spot model departing from the three-band Emery model relevant to the phenomenology of the cuprate superconductors. This study is motivated by the compelling evidence that the Theta(II)-loop-current order described by this model may explain groundbreaking experiments such as spin-polarized neutron scattering performed in these materials. Here, we demonstrate, within a saddle-point approximation, that the Theta(II)-loop-current order clearly coexists with bidirectional (i.e., checkerboard) d-wave CDW and PDW orders along axial momenta, but is visibly detrimental to the unidirectional (i.e., stripe) case. This result has potentially far-reaching implications for the physics of the cuprates and agrees well with very recent x-ray experiments on YBCO that indicate that at higher dopings the CDW order has indeed a tendency to be bidirectional.

【 授权许可】

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