Double Andreev reflections and double electron transmissions in a normal-superconductor-normal junction based on type-II Weyl semimetal

Abstract

We study the quantum transport behavior of a normal-superconductor-normal junction based on type-II Weyl semimetal, which is arranged in the tilting direction of the Weyl semimetal. We find that both the crossed Andreev reflection and normal reflection are forbidden, while there will be double Andreev reflections and double electron transmissions for the incident electron from the semimetal side. Andreev reflections and transmissions occur both in the retro and specular directions simultaneously, symmetric about the normal of the interface but with different amplitudes, depending on the angle and energy of incident electrons. These transport processes make the junction here quite different from that based on the normal metal or graphene. In addition, the differential conductance is studied for experimental signatures. We find that the conductance is almost unaffected by the chemical potential and it is enhanced with increasing junction length.

arXiv comment8 pages, 6 figures

References in corpus (35)

• Type-II Weyl Semimetals
• Weyl Semimetal in a Topological Insulator Multilayer
• Andreev reflection and Klein tunneling in graphene
• Dirac materials
• Majorana Fermion Induced Resonant Andreev Reflection
• Experimental observation of topological Fermi arcs in type-II Weyl semimetal MoTe2
• Specular Andreev reflection in graphene
• Prediction of the Weyl semimetal in the orthorhombic MoTe2
• Observation of Majorana fermions with spin selective Andreev reflection in the vortex of topological superconductor
• Observation of Fermi Arcs in Type-II Weyl Semimetal Candidate WTe2
• Magnetic breakdown and Klein tunneling in a type-II Weyl semimetal
• Observation of Large Topologically Trivial Fermi-Arcs in the Candidate Type-II Weyl Semimetal WTe2
• Discovery of a new type of topological Weyl fermion semimetal state in Mo${}_x$W${}_{1-x}$Te${}_2$
• Field-Selective Anomaly and Chiral Mode Reversal in Type-II Weyl Materials
• Intrinsic Anomalous Hall Effect in Type-II Weyl Semimetals
• Perfect Andreev Reflection of Helical Edge Modes in InAs/GaSb Quantum Wells
• Majorana Fermions and Odd-frequency Cooper Pairs in a Nano Wire
• Crossed Andreev reflection in a graphene bipolar transistor
• Measuring Chern numbers above the Fermi level in the Type II Weyl semimetal Mo${}_x$W${}_{1-x}$Te${}_2$
• Chiral anomaly and longitudinal magnetotransport in type-II Weyl semimetals
• Anomalous Nernst and Thermal Hall Effects in Tilted Weyl Semimetals
• Emergent Weyl spinors in multi-fermion systems
• Superconductivity in Type-II Weyl Semimetals
• Specular Andreev Reflection in Inversion-symmetric Weyl-semimetals
• Detecting entangled states in graphene via crossed Andreev reflection
• Double Andreev Reflections in Type-II Weyl Semimetal-Superconductor Junctions
• Pseudo-diffusive conduction at the Dirac point of a normal-superconductor junction in graphene
• Josephson effect in a Weyl SNS junction
• Spin-filtered and Spatially Distinguishable Crossed Andreev Reflection in a Silicene-Superconductor Junction
• Josephson effect in superconducting wires supporting multiple Majorana edge states
• Absence of split pairs in the cross-correlations of a highly transparent normal metal-superconductor-normal metal electron beam splitter
• Specular Andreev reflection in thin films of topological insulators
• Long-range Cooper pair splitter with high entanglement production rate
• Anomalous DC Hall response in noncentrosymmetric tilted Weyl semimetals
• Transport in normal-superconductor-normal structures with local conservation of current

Cited by in corpus (4)

• Polar and phase domain walls with conducting interfacial states in a Weyl semimetal MoTe2
• Self-biased current, magnetic interference response, and superconducting vortices in tilted Weyl semimetals with disorder
• Evolution of Pair Correlation Symmetries and Supercurrent Reversal in Tilted Weyl Semimetals
• Equilibrium current in a Weyl-semimetal - superconductor heterostructure