Temporarily enhanced superconductivity from magnetic fields
arXiv:2010.09759 · doi:10.1103/PhysRevB.103.L100502
Abstract
Contrary to the expected detrimental influence on superconductivity when applying a magnetic field, we predict that the abrupt onset of such a field can temporarily strongly enhance the superconducting order parameter. Specifically, we find that the supercurrent in a Josephson junction with a normal metal weak link can increase more than twentyfold in this way. The effect can be understood from the interplay between the energy-dependence of Andreev reflection and the abrupt spin-dependent shift in the distribution functions for excitations in the system. The duration of the increase depends on the inelastic scattering rate in the system and is estimated to be in the range of nanoseconds. We demonstrate this by developing a method which solves the Usadel equation for an arbitrary time-dependence. This enables the study of ultrafast time-dependent physics in heterostructures combining superconductors with different types of materials.
arXiv comment5 (10) pages, 1 (2) figures
References in corpus (18)
- Proximity effects in superconductor-ferromagnet heterostructures
- An optically stimulated superconducting-like phase in K3C60 far above equilibrium Tc
- Long-range effects in superconductor-ferromagnet structures
- Optically induced coherent transport far above Tc in underdoped YBa2Cu3O6+x
- Odd-frequency superconductivity
- Singlet-triplet conversion and the long-range proximity effect in superconductor-ferromagnet structures with generic spin dependent fields
- Optically induced superconductivity in striped La2-xBaxCuO4 by polarization-selective excitation in the near infrared
- General Boundary Conditions for Quasiclassical Theory of Superconductivity in the Diffusive Limit: Application to Strongly Spin-polarized Systems
- A phenomenological theory of zero-energy Andreev resonant states
- Proximity Effect and Multiple Andreev Reflections in Diffusive SNS Junctions
- Ferromagnetic Josephson junction with precessing magnetization
- Field-dependent nonlinear surface resistance and its optimization by surface nano-structuring in superconductors
- Coherent excited states in superconductors due to a microwave field
- Tunnel-Junction Thermometry Down to Millikelvin Temperatures
- The role of interface transparency and spin-dependent scattering in diffusive ferromagnet/superconductor heterostructures
- Theory of Microwave-Assisted Supercurrent in Diffusive SNS Junctions
- Zeeman effect induced 0- transitions in ballistic Dirac semimetal Josephson junctions
- Supercurrent Vortex Pinball via a Triplet Cooper Pair Inverse Edelstein Effect