Unusual quasiparticle correlation in graphene

by Philip Kim

at Physics Colloquium

Tue, 23 May 2017, 15:00
Nanotechnology institute building (#51) room 15

Abstract

Interactions between particles in quantum many body systems can lead to a collective behavior In a condensed matter system consisting of weakly interacting particles a propagating particle interacting with its surroundings can be viewed as a dressed quasiparticle with renormalized mass and other dynamic properties The lack of screening enables strong Coulomb interactions between charged particles leading to new collective dynamics In this talk I will discuss three examples concerning strongly interacting quasiparticles in graphene In the first example it will be shown that the thermally populated electrons and holes to realize Dirac fluid where a huge violation of Wiedemann Franz law is observed The second example is realizing magnetoexcitons to correlated the quasiparticles in quantized Landau levels to form magnetoexcitons which can condense into Bose Einstein condensation Finally we will also discuss another way of correlated quasi particles in graphene using superconducting proximity effect Here we employ the crossed Andreev reflection across thin type II superconducting electrodes to correlated spatially separated quasiparticles Under strong magnetic fields the quantum Hall edge states can carry these quasiparticles Refreshments are served at 14:45

Created on 25-04-2017 by Bar Lev, Yevgeny (ybarlev)
Updaded on 25-04-2017 by Bar Lev, Yevgeny (ybarlev)