Evidence of magnetic mechanism for cuprate superconductivity

Abstract

A proper understanding of the mechanism for cuprate superconductivity can emerge only by comparing materials in which physical parameters vary one at a time. Here we present a variety of bulk, resonance, and scattering measurements on the (Ca_xLa_{1-x})(Ba_{1.75-x}La_{0.25+x})Cu_3O_y high temperature superconductors, in which this can be done. We determine the superconducting, Neel, glass, and pseudopage critical temperatures. In addition, we clarify which physical parameter varies, and, equally important, which does not, with each chemical modification. This allows us to demonstrate that a single energy scale, set by the superexchange interaction J, controls all the critical temperatures of the system. J, in-turn, is determined by the in plane Cu-O-Cu buckling angle.

17 pages, 13 figures

References in corpus (9)

• From Fermi Arcs to the Nodal Metal: Scaling of the Pseudogap with Doping and Temperature
• Muon spin rotation studies of electronic excitations and magnetism in the vortex cores of superconductors
• A magnetic analog of the isotope effect in cuprates
• Calculated Magnetic Exchange Interactions in High-Temeprature Superconductors
• Universal scaling behavior of the c-axis resistivity of high-temperature superconductors
• Universal doping dependence of the ground state staggered magnetization in cuprates
• Evidence of two distinct charge carriers in underdoped high Tc cuprates
• Experimental investigation of the origin of the cross-over temperature in the cuprates
• Antiferromagnetism in two-dimensional t-J model: pseudospin representation

Cited by in corpus (7)

• Ab initio quantum many-body description of superconducting trends in the cuprates
• Critical-doping universality for cuprate superconductors: Oxygen nuclear-magnetic-resonance investigation of Ca(x)La(1-x)Ba(1.75-x)La(0.25+x)Cu(3)O(y)
• 17O-NMR Knight shift study of the interplay between superconductivity and pseudogap in (Ca_xLa_{1-x})(Ba_{1.75 - x}La_{0.25 + x})Cu_3O_y
• Relation between cuprate superconductivity and magnetism: A Raman study of (CaLa)(BaLa)${}_2$Cu${}_3$O${}_y$
• Linking Dynamic and Thermodynamic Properties of Cuprates; an ARPES study of (CaLa)(BaLa)${}_2$Cu${}_3$O${}_y$
• Interfacial and thickness effects in La${}_{2/3}$Sr${}_{1/3}$MnO${}_3$/YBa${}_2$Cu${}_3$O${}_7$ superlattices
• Pressure tuning of superconductivity independent of disorder in Tl${}_2$Ba${}_2$CaCu${}_2$O${}_{8+\delta }$