HCS – Hall coefficient – Bismuth-Antimony alloy

Inorganics/semiconductors – Hall coefficient – resistivity – mobility

Bismuth-antimony alloys, (Bi1−xSbx) are binary alloys of bismuth and antimony in various ratios. Some, in particular Bi0.9Sb0.1, were the first experimentally-observed three-dimensional topological insulators, materials that have conducting surface states but have an insulating interior. Various BiSb alloys are also used in low temperature thermoelectric devices.

App. Nr. 02-010-002 HCS – Hall coefficient – Inorganics semiconductors

App. Nr. 02-010-002 HCS – Hall coefficient – Inorganics semiconductors

The presented measurement has been conducted on a thermally evaporated Bi87Sb13 thin film. The thermal resistivity (blue curve) is decreasing by temperature which is contrary to a full metal conductor behavior but typical for a semiconductor. The hall coefficient and charge carrier mobility is slightly decreasing over temperature (green and orange curves).

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The HCS System permits the characterization of semiconductor devices, it measures: mobility, resistivity, charge carrier concentration and Hall coefficient