Resonant multilead point-contact tunneling

Resonant multilead point-contact tunneling

We analyze a model of resonant point-contact tunneling between multiple Luttinger-liquid leads. The model is a variant of the multichannel Kondo model and can be related to the quantum Brownian motion of a particle on lattices with p flux through each plaquette ~in the three-lead case, it is a honeycomb lattice with p flux!. By comparing the perturbative and instanton gas expansions, we find a ...

Two-channel point-contact tunneling theory of superconductors

Mikael Fogelström,1 Matthias J. Graf,2 V. A. Sidorov,3 Xin Lu,4 E. D. Bauer,5 and J. D. Thompson5 1Department of Microtechnology and Nanoscience, Chalmers, S-412 96 Göteborg, Sweden 2Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA 3Vereschagin Institute of High Pressure Physics, RAS, 142190 Troitsk, Russia 4Center for Correlated Matter, Zhejiang Universit...

Point-contact tunneling involving low-dimensional spin-triplet superconductors.

We modify and extend previous microscopic calculations of tunneling in superconducting junctions based on a nonequilibrium Green function formalism to include the case of spin-triplet pairing. We show that distinctive features are present in the I-V characteristics of different kinds of junctions, in particular, when the effects of magnetic fields are taken into account, that permit to identify...

THz resonant-tunneling diodes

Resonant Tunneling throughQuantumDots

Motivated by recent experiments we analyse a new setup of capacitively coupled semiconductor quantum dots. We identify a region where Kondo-assisted tunneling should be observable. We nd an eeective mapping to a single quantum dot with controllable multi-level structure. We study electron transport through strongly coupled quantum dots in the presence of strong Coulomb repulsion and coupling to...