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-${\mathit{T}}_{\mathit{c}}$ superconductors in magnetic fields (H/${\mathit{H}}_{\mathit{c}2}$\ensuremath{\ll}1). In the weak-frustration region the I-V characteristics and magnetoresistance obey coexisting power laws with continuously varying exponents, V\ensuremath{\propto}${\mathit{I}}^{\mathrm{\ensuremath{\alpha}}(\mathit{T},}$${\mathit{H}}^{)}$ and V\ensuremath{\propto}${\mathit{H}}^{\mathrm{\ensuremath{\beta}}(\mathit{T},}$${\mathit{I}}^{)}$. These field-dependent nonlinear resistive behaviors are analogous to experimentally observed ones in single crystals of high-${\mathit{T}}_{\mathit{c}}$ 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.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
