Frustration-induced nonlinear resistivities of high-Tc superconductors in magnetic fields

R. Sugano; T. Onogi; Y. Murayama

doi:10.1103/PhysRevB.45.10789

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Frustration-induced nonlinear resistivities of high-Tc superconductors in magnetic fields

R. Sugano, T. Onogi, Y. Murayama

DOI 10.1103/PhysRevB.45.10789 · Physical Review B

T1

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Abstract

We have performed a finite-temperature (T) dynamic simulation to calculate transport properties of a two-dimensional (2D) frustrated Josephson-coupled lattice as a model of high-Tc superconductors in magnetic fields (H/Hc2≪1). In the weak-frustration region the I-V characteristics and magnetoresistance obey coexisting power laws with continuously varying exponents, V∝Iα(T,H) and V∝Hβ(T,I). These field-dependent nonlinear resistive behaviors are analogous to experimentally observed ones in single crystals of high-Tc oxides, and they are ascribed to the frustration-induced unbinding mechanism of 2D vortex-antivortex pairs. A possible Kosterlitz-Thouless vortex-antivortex unbinding transition in magnetic fields is also addressed based on the temperature dependence of power-law exponents.

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
ErBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown