Quantum disordered regime and spin gap in the cuprate superconductors

V. Barzykin; D. Pines; A. Sokol; D. Thelen

doi:10.1103/PhysRevB.49.1544

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Quantum disordered regime and spin gap in the cuprate superconductors

V. Barzykin, D. Pines, A. Sokol, D. Thelen

DOI 10.1103/PhysRevB.49.1544 · Physical Review B

T1

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Abstract

We discuss the crossover from the quantum critical, z=1, to the quantum disordered regime in high-Tc materials in relation to the experimental data on the nuclear relaxation, bulk susceptibility, and inelastic neutron scattering. In our scenario, the spin excitations develop a gap Δ∼1/ξ well above Tc, which is supplemented by the quasiparticle gap below Tc. The above experiments yield consistent estimates for the value of the spin gap, which increases as the correlation length decreases.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O6.63 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown