Graphene-based electronic spin lenses
arXiv:1009.0904 · doi:10.1103/PhysRevLett.105.146803
Abstract
We theoretically demonstrate the capability of a ferromagnetic-normal (FN) interface in graphene to focus an electron-wave with a certain spin direction. The essential feature is the negative refraction Klein tunneling, which is spin-resolved when the exchange energy of F graphene exceeds its Fermi energy. Exploiting this property, we propose a graphene NFN electronic spin lens through which an unpolarized electronic beam can be collimated with a finite spin-polarization. Our study reveals that magnetic graphene has the potential to be the electronic counterpart of the recently discovered photonic chiral meta-materials that exhibit a negative refractive index for only one direction of the circular polarization of the photon-wave.
4 pages, 3 figures, accepted for publication in Phys. Rev. Lett
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- Selective focusing of electrons and holes in a graphene-based superconducting lens
- Anomalous caustics and Veselago focusing in 8-Pmmn borophene p-n junctions with arbitrary junction directions
- Tunable Supercurrent at the Charge Neutrality Point via Strained Graphene Junctions
- Anisotropic RKKY interaction in spin polarized graphene
- Enhanced Andreev reflection in gapped graphene
- Focusing RKKY interaction by graphene P-N junction
- General Green's function formalism for layered systems: Wave function approach
- Electron beam splitting at topological insulator surface states and a proposal for electronic Goos-Hanchen shift measurement
- Spin-dependent thermoelectric effects in graphene based superconductor junctions
- Imaging backscattering in graphene quantum point contacts
- Dirac point formation revealed by Andreev tunneling in superlattice-graphene/superconductor junctions
- Gate-controlled valley transport and Goos-Hänchen effect in monolayer WS
- Charge and spin Hall effect in spin chiral ferromagnetic graphene
- Veselago focusing of anisotropic massless Dirac fermions
- Decay of semiclassical massless Dirac fermions from integrable and chaotic cavities
- Graphene Hall bar with an asymmetric pn-junction
- Chaos based Berry phase detector
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- Point contacts in encapsulated graphene
- Gate controllable spin pumping in graphene via rotating magnetization
- Bilayer graphene Hall bar with a pn-junction
- Superconducting electron and hole lenses
- Hidden quantum mirage by negative refraction in semiconductor P-N junctions
- Boltzmann conductivity of ferromagnetic graphene with magnetic impurities
- Electrical and thermal transport through NIS junction
- Tunable magnetoresistance in spin-orbit coupled graphene junctions
- Graphene as a non-magnetic spin-current lens
- Thermopower generation and thermoelectric cooling in a Kane-Mele normal-insulator-superconductor nano-junction
- Spin-Valley Beam Splitter in Graphene
- Spin-dependent electronic lenses based on hybrid graphene nanostructures
- Spin-dependent edge states in two-dimensional Dirac materials with a flat band
- Effect of non-uniform exchange field in ferromagnetic graphene