4π-periodic Andreev bound states in a Dirac semimetal
نویسندگان
چکیده
منابع مشابه
Andreev Bound States in Ferromagnet - Superconductor Nanostructures ⋆
We discuss the properties of a ferromagnet superconductor heterostructure on the basis of a Hubbard model featuring exchange splitting in the ferromagnet and electron electron attraction in the superconductor. We have solved the spin polarized Hartree Fock Gorkov equations together with the Maxwell’s equation (Ampere’s law) fully self-consistently. We have found that a Proximity Effect Fulde Fe...
متن کاملDirac semimetal in three dimensions.
We show that the pseudorelativistic physics of graphene near the Fermi level can be extended to three dimensional (3D) materials. Unlike in phase transitions from inversion symmetric topological to normal insulators, we show that particular space groups also allow 3D Dirac points as symmetry protected degeneracies. We provide criteria necessary to identify these groups and, as an example, prese...
متن کاملTransport through Andreev bound states in a graphene quantum dot
When a low-energy electron is incident on an interface between a metal and superconductor, it causes the injection of a Cooper pair into the superconductor and the generation of a hole that reflects back into the metal—a process known as Andreev reflection. In confined geometries, this process can give rise to discrete Andreev bound states (ABS), which can enable transport of supercurrents thro...
متن کاملAndreev bound states and tunneling characteristics of a noncentrosymmetric superconductor
C. Iniotakis,1 N. Hayashi,1,2 Y. Sawa,3 T. Yokoyama,3 U. May,1 Y. Tanaka,3 and M. Sigrist1,4 1Institute for Theoretical Physics, ETH Zurich, 8093 Zurich, Switzerland 2CCSE, Japan Atomic Energy Agency, Tokyo 110-0015, Japan and CREST, JST, Tokyo 110-0015, Japan 3Department of Applied Physics, Nagoya University, Nagoya, 464-8603, Japan 4Department of Physics, Kyoto University, Kyoto 606-8502, Jap...
متن کاملAndreev bound states in high - T c superconducting junctions
The formation of bound states at surfaces of materials with an energy gap in the bulk electron spectrum is a well known physical phenomenon. At superconductor surfaces, quasiparticles with energies inside the superconducting gap ∆ may be trapped in bound states in quantum wells, formed by total reflection against the vacuum and total Andreev reflection against the superconductor. Since an elect...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature Materials
سال: 2018
ISSN: 1476-1122,1476-4660
DOI: 10.1038/s41563-018-0158-6