Investigation of the thermal transport and magnetic properties of 2M-WS<sub>2</sub>
POSTER
Abstract
Magnetic measurements are conducted on polycrystalline 2M-WS2 samples using a Quantum Design Physical Property Measurement System (PPMS) to confirm the superconducting Meisner effect transition at approximately 8 K. This superconducting regime is currently explored using thermal Hall measurements. Thermal Hall measurements allow for an exploration of physical phenomena present in the 2M-WS2 samples within the superconducting state.
It is theorized that in systems exhibiting topological superconductivity Majorana fermions exist on the surfaces and edges of the samples inside the superconducting regime, which may exhibit unique behaviors in their thermal conductivity and thermal Hall effect. The thermal Hall effect is obtained by a transverse temperature gradient when a heat current flows in the longitudinal direction. The phonon contribution to the thermal conductivity can be estimated by measurements both below and above Tc. Their difference is assumed to be the thermal carrier contribution to the thermal conductivity from the Majorana fermions. We will present the design and operation of our thermal Hall measurement setup as well as data collected on bulk 2M-WS2 samples.
It is theorized that in systems exhibiting topological superconductivity Majorana fermions exist on the surfaces and edges of the samples inside the superconducting regime, which may exhibit unique behaviors in their thermal conductivity and thermal Hall effect. The thermal Hall effect is obtained by a transverse temperature gradient when a heat current flows in the longitudinal direction. The phonon contribution to the thermal conductivity can be estimated by measurements both below and above Tc. Their difference is assumed to be the thermal carrier contribution to the thermal conductivity from the Majorana fermions. We will present the design and operation of our thermal Hall measurement setup as well as data collected on bulk 2M-WS2 samples.
Presenters
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Jefferson A Carter
University of Wyoming
Authors
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Jefferson A Carter
University of Wyoming
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Joseph McBride
Department of Chemistry, University of Wyoming, University of Wyoming
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Brian Leonard
Department of Chemistry, University of Wyoming, University of Wyoming
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Jinke Tang
University of Wyoming, University of Wyoming, Department of Physics and Astronomy