Spin-filtered and Spatially Distinguishable Crossed Andreev Reflection in a Silicene-Superconductor Junction
arXiv:1607.01132 · doi:10.1103/PhysRevB.94.165441
Abstract
We theoretically investigate the quantum transports in a junction between a superconductor and a silicene nanoribbon, under the effect of a magnetic exchange field. We find that for a narrow nanoribbon of silicene, remarkable crossed Andreev reflection (with a fraction ) can be induced in the energy window of the elastic cotunneling, by destroying some symmetries of the system. Since the energy responses of electrons to the exchange field are opposite for opposite spins, these transport channels can be well spin polarized. Moreover, due to the helicity conservation of the topological edge states, these three transport channels are spatially separated in three different locations of the device, making them experimentally distinguishable. This crossed Andreev reflection is a nonlocal quantum interference between opposite edges through evanescent modes. If two superconducting leads with different phases are connected to two edges of the silicene nanoribbon, the crossed Andreev reflection can present Josephson type oscillations, with a maximal fraction .
arXiv comment8 pages, 7 figures
References in corpus (33)
- Quantum Spin Hall Effect in Graphene
- Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
- Quantum Spin Hall Effect in Silicene
- Valley-Polarized Metals and Quantum Anomalous Hall Effect in Silicene
- Observation of Majorana fermions with spin selective Andreev reflection in the vortex of topological superconductor
- Andreev-Tunneling, Coulomb Blockade, and Resonant Transport of Non-Local Spin-Entangled Electrons
- Finite size effects of helical edge states in HgTe/CdTe quantum wells
- Splitting of a Cooper pair by a pair of Majorana bound states
- Evidence for crossed Andreev reflection in superconductor-ferromagnet hybrid structures
- Electronic Entanglement in the Vicinity of a Superconductor
- Time-reversal-symmetry-broken quantum spin Hall effect
- Imaging currents in HgTe quantum wells in the quantum spin Hall regime
- Experimental observation of bias-dependent non-local Andreev reflection
- Noise of Entangled Electrons: Bunching and Antibunching
- Controllable valley and spin transports in ferromagnetic silicene junctions
- Theory of the valley-valve effect in graphene nanoribbons
- Perfect Andreev Reflection of Helical Edge Modes in InAs/GaSb Quantum Wells
- Non-Local Correlations in Normal Metal-Superconducting Systems
- Crossed Andreev reflection in a graphene bipolar transistor
- Quantum transport through a graphene nanoribbon-superconductor junction
- Reversing non-local transport through a superconductor by electromagnetic excitations
- Superconducting Proximity Effect in Silicene: Spin-Valley Polarized Andreev Reflection, Non-Local Transport, and Supercurrent
- Controllable Andreev retroreflection and specular Andreev reflection in a four-terminal graphene-superconductor hybrid system
- Andreev reflection in graphene nanoribbons
- Probing the helical edge states of a topological insulator by Cooper-pair injection
- Nonlocal Cooper pair Splitting in a pSn Junction
- Proposal for an all-electrical measurement of crossed Andreev reflection in topological insulators
- Positive noise cross-correlations in superconducting hybrids: Roles of interfaces and interactions
- Quantum Andreev effect in 2D HgTe/CdTe quantum well-superconductor systems
- Self-consistent microscopic calculations for non-local transport through nanoscale superconductors
- Nonlocal transistor based on pure crossed Andreev reflection in a EuO-graphene/superconductor hybrid structure
- High-Efficiency Cooper-Pair Splitter in Quantum Anomalous Hall Insulator Proximity-Coupled with Superconductor
- Can dephasing generate non-local spin correlations?
Cited by in corpus (7)
- Perfect crossed Andreev reflection in Dirac hybrid junctions in the quantum Hall regime
- Electrical control of crossed Andreev reflection and spin-valley switch in antiferromagnet/superconductor junctions
- Electrically controlled crossed Andreev reflection in two-dimensional antiferromagnets
- Anisotropic Andreev Reflection and Josephson Effect in Ballistic Phosphorene
- Double Andreev reflections and double electron transmissions in a normal-superconductor-normal junction based on type-II Weyl semimetal
- Field-Programmable Topological Array: Framework and Case-Studies
- Spin-dependent Andreev reflection in spin-orbit coupled systems by breaking time-reversal symmetry