Unconventional Superconductivity in Double Quantum Dots
arXiv:1404.0813 · doi:10.1103/PhysRevB.90.220501
Abstract
The formation of electron pairs is a prerequisite of superconductivity. The fermionic nature of electrons yields four classes of superconducting correlations with definite symmetry in spin, space and time. Here, we suggest double quantum dots coupled to conventional s-wave superconductors in the presence of inhomogeneous magnetic fields as a model system exhibiting unconventional pairing. Due to their small number of degrees of freedom, tunable by gate voltages, quantum-dot systems provide an ideal tool to gain fundamental insight in unconventional pairing. We propose two detection schemes for unconventional superconductivity, based on either Josephson or Andreev spectroscopy.
5 pages manuscript + 5 pages supplemental material
References in corpus (16)
- Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
- A spin triplet supercurrent through the half-metallic ferromagnet CrO2
- Theory of the proximity effect in junctions with unconventional superconductors
- Parity qubits and poor man's Majorana bound states in double quantum dots
- Josephson current through a single Anderson impurity coupled to BCS leads
- Superconducting proximity effect in interacting double-dot systems
- Josephson effect due to the long-range odd-frequency triplet superconductivity in SFS junctions with Neel domain walls
- Pairing symmetry conversion by spin-active interfaces in superconducting junctions
- Real-time diagrammatic approach to transport through interacting quantum dots with normal and superconducting leads
- Critical current of a Josephson junction containing a conical magnet
- Kondo effect in asymmetric Josephson couplings through a quantum dot
- Odd triplet superconductivity in a superconductor/ferromagnet structure with a spiral magnetic structure
- 0-pi Transitions in a Superconductor/Chiral Ferromagnet/Superconductor Junction induced by a Homogeneous Cycloidal Spiral
- Odd triplet superconductivity in superconductor-ferromagnet structures with a narrow domain wall
- Probing the exchange field of a quantum-dot spin valve by a superconducting lead
- Renormalization effects in interacting quantum dots coupled to superconducting leads