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Volume 6
Research & Reviews: Journal of Material Sciences
ISSN: 2321-6212
Magnetic Materials 2018
October 22-23, 2018
October 22-23, 2018 | Rome, Italy
3
rd
International Conference on
Magnetism and Magnetic Materials
Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C6-030
Thermal conductance of zero modes on the surface boundary of a Weyl semimetal
David Schmeltzer
City College of the City University of New York, USA
T
hermoelectric conductance of Dirac materials and in particular zero modes reveal the effect of topology. Weyl semimetals
with a boundary at $z=0$ gives rise to chiral zero modes without backscattering, resulting in a significant contribution
to thermal conductivity. By doping the surface with paramagnetic impurities, backscattering is allowed and the thermal
conductance is suppressed. We attach a thermal reservoir at the edge of the sample and study the thermal and electrical
conductance. For the ballistic and mesoscopic situations, quantum fluctuations cause oscillations of the thermal and electric
conductance. The thermoelectric conductance varies periodically with the voltage bias. We compare the thermal conductance
with and without magnetic impurity scattering and observe the effects of topology. An experimental set-up is proposed to test
this theory.
dschmeltzer@ccny.cuny.edu