HCS – Hall coefficient – Bismuth-Antimony alloy

Inorganics/semiconductors – Hall coefficient – resistivity – mobility

Bismuth-antimony alloys, denoted as (Bi1−xSbx), are binary combinations of bismuth and antimony in different ratios. Notably, certain compositions, such as Bi0.9Sb0.1, were among the first experimentally-observed three-dimensional topological insulators. These materials exhibit conducting surface states while maintaining an insulating interior. BiSb alloys, including Bi0.9Sb0.1, find applications in low-temperature thermoelectric devices.

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

The featured measurement focused on a thermally evaporated thin film of Bi87Sb13. The thermal resistivity, depicted by the blue curve, exhibits a decrease with temperature. This behavior is in contrast to that of a full metal conductor but aligns with typical semiconductor characteristics. Concurrently, the hall coefficient (green curve) and charge carrier mobility (orange curve) show a slight decrease with increasing temperature.

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

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