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Andreev bound states in supercurrent-carrying carbon nanotubes revealed
Although carbon nanotubes are not superconductors they can carry supercurrents injected from superconducting contacts. Analysis of the tunnelling spectra of a nanotube connecting two superconductors…
Remarks on the tight-binding model of graphene
We address a simple but fundamental issue arising in the study of graphene, as well as of other systems that have a crystalline structure with more than one atom per unit cell. For these systems, the…
Spin imbalance and spin-charge separation in a mesoscopic superconductor
Injection of spin-polarized electrons into a superconductor leads to both spin and charge imbalance. If charge relaxation occurs faster than spin relaxation, it is possible to observe excess spin at…
Fourier-transform scanning tunnelling spectroscopy: the possibility to obtain constant-energy maps and band dispersion using a local measurement
We present here an overview of the Fourier-transform scanning tunnelling spectroscopy technique (FT-STS). This technique allows one to probe the electronic properties of a two-dimensional system by…
Effect of a single localized impurity on the local density of States in monolayer and bilayer graphene.
- C. Bena
- PhysicsPhysical review letters
- 27 June 2007
The T-matrix approximation is used to analyze the effect of a localized impurity on the local density of states in monolayer and bilayer graphene to show that Friedel oscillations generated by intranodal scattering obey an inverse-square law.
Spin and Majorana polarization in topological superconducting wires.
The local Majorana polarization is correlated to the transverse spin polarization, and it is proposed to test the presence of Majorana fermions in a 1D system by a spin-polarized density of states measurement.
Quantum entanglement in carbon nanotubes.
It is shown that judiciously bringing together two systems of strongly interacting electrons with vastly differing ground states-the gapped BCS superconductor and the Luttinger liquid can result in quantum entanglement.
Quasiparticle chirality in epitaxial graphene probed at the nanometer scale.
Scanning tunneling microscopy can be used to probe graphene's unique symmetry properties at the nanometer scale, and it is demonstrated that the pseudospin and the electronic chirality in epitaxial graphene on SiC(0001) correspond to the ones predicted for ideal graphene.
Majorana bound states in open quasi-one-dimensional and two-dimensional systems with transverse Rashba coupling
We study the formation of Majorana states in quasi-one-dimensional (quasi-1D) and two-dimensional square lattices with open boundary conditions, with general anisotropic Rashba coupling, in the…
Dirac point metamorphosis from third-neighbor couplings in graphene and related materials
We study the band structure and the density of states of graphene in the presence of a next-to-nearest-neighbor coupling (N2) and a third-nearest-neighbor coupling (N3). We show that for values of N3…