Browsing School of Physics by Author "NARAYAN, AWADHESH"
Now showing items 1-4 of 4
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Andreev reflection in two-dimensional topological insulators with either conserved or broken time-reversal symmetry
SANVITO, STEFANO; NARAYAN, AWADHESH (2012)We investigate Andreev reflection in two-dimensional heterojunctions formed by a superconductor in contact with a topological insulator ribbon either possessing or breaking time-reversal symmetry. Both classes of topological ... -
Efficient spin injection and giant magnetoresistance in Fe/MoS2/Fe junctions
SANVITO, STEFANO; NARAYAN, AWADHESH; RUNGGER, IVAN (2014)We demonstrate giant magnetoresistance in Fe/MoS2/Fe junctions by means of ab initio transport calculations. We show that junctions incorporating either a monolayer or a bilayer of MoS2 are metallic and that Fe acts as an ... -
Gate controlled spin pumping at a quantum spin Hall edge
SANVITO, STEFANO; NARAYAN, AWADHESH (2013)We propose a four-terminal device designed to manipulate by all electrical means the spin of a magnetic adatom positioned at the edge of a quantum spin Hall insulator. We show that an electrical gate, able to tune the ... -
Topological Tuning in Three-Dimensional Dirac Semimetals
SANVITO, STEFANO; NARAYAN, AWADHESH (2014)We study with first-principles methods the interplay between bulk and surface Dirac fermions in three dimensional Dirac semimetals. By combining density functional theory with the coherent potential approximation, we reveal ...