Theory of reduced singlet pairing without the underlying state of charge stripes in the high-temperature superconductorYBa2Cu3O6.45

2008/02/29 by Hiroyuki Yamase
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.79.052501

published as Phys. Rev. B 79, 052501 (2009) · 11 pages, 4 figures, published version

openalex publication_date 2009/02/04 · arxiv created 2009/04/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

Recently, a strongly enhanced xy anisotropy of magnetic excitations was observed in YBa₂Cu₃O_y (YBCO_y), with y=6.45 and T_c=35 K [V. Hinkov et al., Science 319, 597 (2008)]. Unlike the observation in YBCO_6.6 and YBCO_6.85, the anisotropy grows to be pronounced at lower temperature and at lower energy and is not suppressed by the onset of superconductivity. We propose that the effect of singlet pairing is substantially reduced in YBCO_6.45. This reduction concomitantly enhances an order competing with singlet pairing, a strong tendency of the so-called d-wave Pomeranchuk instability, leading to the magnetic excitations observed experimentally.

Citations

• Theory for inelastic neutron scattering in orthorhombic high-Tcsuperconductors
• Electronic Liquid Crystal State in the High-Temperature Superconductor YBa 2 Cu 3 O 6.45
• Effects of Charge Density Modulation on Incommensurate Antiferromagnetism: Ginzburg-Landau Study
• Observing the fluctuating stripes in high-T c superconductors
• Evolution of the resonance and incommensurate spin fluctuations in superconductingYBa2Cu3O6+x
• Electronic liquid-crystal phases of a doped Mott insulator
• Competition of Fermi surface symmetry breaking and superconductivity
• In-plane anisotropy of spin excitations in the normal and superconducting states of underdoped YBa₂Cu₃O_6+x
• Theory of the nodal nematic quantum phase transition in superconductors