Interface electronic structure at the topological insulator-ferrimagnetic insulator junction.

Electronic structures of quasi-one-dimensional ferrimagnetic insulator Ca3Co2O6

Ab initio description of tunnel junctions

Based on spin-density functional theory we calculate the electronic structure of a tunnel junction consisting of two magnetic Fe layers separated by an insulating vacuum barrier selfconsistently. For the conductance the Landauer formula is evaluated in the ballistic limit as function of the magnetic configuration. Based on these conductances the tunnel magnetoresistance (TMR) ratio is obtained....

Variable resistance at the boundary between semimetal and excitonic insulator

We solve the two-band model for the transport across a junction between a semimetal and an excitonic insulator. We analyze the current in terms of two competing terms associated with neutral excitons and charged carriers, respectively. We find a high value for the interface resistance, extremely sensitive to the junction transparency. We explore favorable systems for experimental confirmation.

Tunable THz surface plasmon polariton based on a topological insulator/layered superconductor hybrid structure

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. We theoretically investigate the surface plasmon polariton (SPP) at the interface between a three-dimensional stron...

Quantum transparency of Anderson insulator junctions: Statistics of transmission eigenvalues, shot noise, and proximity conductance

We investigate quantum transport through strongly disordered barriers, made of a material with exceptionally high resistivity that behaves as an Anderson insulator or a “bad metal” in the bulk, by analyzing the distribution of Landauer transmission eigenvalues for a junction where such barrier is attached to two clean metallic leads. We find that scaling of the transmission eigenvalue distribut...