The Temperature dependence of the magneto-resistance peak in highly disordered superconductors
arXiv:1804.08471 · doi:10.1103/PhysRevB.98.184515
Abstract
Highly disordered superconductors have a rich phase diagram. At a moderate magnetic field (B) the samples go through the superconductor-insulator quantum phase transition. In the insulating phase, the resistance increases sharply with B up to a magneto-resistance peak beyond which the resistance drops with B. In this manuscript we follow the temperature (T) evolution of this magneto-resistance peak. We show that as T is reduced, the peak appears at lower B's approaching the critical field of the superconductor-insulator transition. Due to experimental limitations we are unable to determine whether the T=0 limiting position of the peak matches that of the critical field or is at comparable but slightly higher B. We show that, although the peak appears at different B values, its resistance follows an activated T dependence over a large T range with a prefactor that is very similar to the quantum of resistance for cooper-pairs.
References in corpus (16)
- Continuous Quantum Phase Transitions
- Electric Field Control of the LaAlO/SrTiO Interface Ground State
- Localization of preformed Cooper-pairs in disordered superconductors
- Nature of the superconductor-insulator transition in disordered superconductors
- Fractal superconductivity near localization threshold
- Superconductivity-Related Insulating Behavior
- Localized Superconductivity in the Quantum-Critical Region of the Disorder-Driven Superconductor-Insulator Transition in TiN Thin Films
- Superconductivity in the insulating phase above the field-tuned superconductor-insulator transition in disordered indium oxide films
- Evidence for a Finite Temperature Insulator
- Survival of superconducting correlations across the 2D superconductor-insulator transition: A finite frequency study
- Observation of Giant Positive Magnetoresistance in a Cooper Pair Insulator
- Superconductivity on the localization threshold and magnetic-field-tuned superconductor-insulator transition in TiN films
- Self Duality and a possible Hall-insulator phase near the superconductor-to-insulator transition in two-dimensional indium-oxide films
- Electrostatic- and Parallel Magnetic Field- Tuned Two Dimensional Superconductor-Insulator Transitions
- High field termination of a Cooper-pair insulator
- Instability of insulators near quantum phase transitions