"Nodal gap" induced by the incommensurate diagonal spin density modulation in underdoped high-T_c superconductors

2014/06/20 by Tao Zhou, Yi Gao, Zhou, Tao +3
Chemistry · Physics and Astronomy · #FOS: Physical sciences #Inorganic Fluorides and Related Compounds #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #Superconductivity in MgB2 and Alloys

paper · pdf · doi:10.48550/arxiv.1406.5408

openalex publication_date 2014/06/20 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28

Abstract

Recently it was revealed that the whole Fermi surface is fully gapped for several families of underdoped cuprates. The existence of the finite energy gap along the d-wave nodal lines ("nodal gap") contrasts the common understanding of the d-wave pairing symmetry, which challenges the present theories for the high-T_c superconductors. Here we propose that the incommensurate diagonal spin-density-wave order can account for the above experimental observation. The Fermi surface and the local density of states are also studied. Our results are in good agreement with many important experiments in high-T_c superconductors.

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