Coexistence of $\Theta_{II}$-loop-current order with checkerboard d-wave CDW/PDW order in a hot-spot model for cuprate superconductors

Abstract : 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 $(\pm Q_0,0)$ and $(0,\pm Q_0)$ 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.
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Physical Review B : Condensed matter and materials physics, American Physical Society, 2016, 93 (11), pp.115144. 〈10.1103/PhysRevB.93.115144〉
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https://hal-cea.archives-ouvertes.fr/cea-01469427
Contributeur : Emmanuelle De Laborderie <>
Soumis le : jeudi 16 février 2017 - 14:31:53
Dernière modification le : jeudi 15 mars 2018 - 15:06:38

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Vanuildo S. De Carvalho, Catherine Pépin, Hermann Freire. Coexistence of $\Theta_{II}$-loop-current order with checkerboard d-wave CDW/PDW order in a hot-spot model for cuprate superconductors. Physical Review B : Condensed matter and materials physics, American Physical Society, 2016, 93 (11), pp.115144. 〈10.1103/PhysRevB.93.115144〉. 〈cea-01469427〉

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