Coherence peak in the spin susceptibility from nesting in spin-triplet superconductors: A probe for line nodes in Sr2RuO4

Article

关键词: T-J MODEL;    NEUTRON-SCATTERING;    MAGNETIC-PROPERTIES;    LAYERED PEROVSKITE;    ORDER-PARAMETER;    FERMI-SURFACE;    STATES;    FLUCTUATIONS;    GAP;    YBA2CU3O6+X;   

DOI  :  10.1103/PhysRevB.67.014512

来源: SCIE

【 摘 要 】

We study the dynamical spin susceptibility chi(q,omega) for spin-triplet superconductivity. We show that a large peak at omega=2Delta appears in Imchi(zz)(Q,omega), where z is the direction of the d vector for triplet pairing, if Fermi surface has a nested part with the nesting vector Q and the order parameters are +Delta and -Delta in this part of the Fermi surface. If there are line nodes in the nested part of the Fermi surface, a peak appears in either Imchi(zz)(Q,omega) or Imchi(+-)(Q,omega), or both, depending on the perpendicular component of the nesting vector. The comparison with inelastic neutron-scattering experiments can determine the position of the line nodes in triplet superconductor Sr2RuO4.

【 授权许可】

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