2015/11/30 by Vanuildo S. de Carvalho, C. Pépin, Catherine Pépin +1 · 17 citations
Materials Science · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Cuprate #Geometry #Iron-based superconductors research #Mathematics #Order (exchange) #Particle physics #Physics #Physics of Superconductivity and Magnetism #Saddle point #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.93.115144
published in Physical review. B./Physical review. B 93(11) (American Physical Society) · Published in Physical Review B
openalex publication_date 2016/03/29 · arxiv created 2016/04/04 · arxiv updated 2016/04/06 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We investigate the strong influence of the \mathrm\ensuremathΘII-loop-current order on both unidirectional and bidirectional d-wave charge-density-wave/pair-density-wave (CDW/PDW) composite orders along axial momenta (\ifmmode±\else\textpm\fiQ0,0) and (0,\ifmmode±\else\textpm\fiQ0) 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 \mathrm\ensuremathΘII-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 \mathrm\ensuremathΘII-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.