Probing the thermal Hall effect using miniature capacitive strontium titanate thermometry
- Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Physics
- Univ. of California, Berkeley, CA (United States). Dept. of Physics
The thermal Hall effect is the thermal analog of the electrical Hall effect. Rarely observed in normal metals, thermal Hall signals have been argued to be a key property for a number of strongly correlated materials, such as high temperature superconductors, correlated topological insulators, and quantum magnets. The observation of the thermal Hall effect requires precise measurement of temperature in intense magnetic fields. Particularly at low temperature, resistive thermometers have a strong dependence on field, which makes them unsuitable for this purpose. We have created capacitive thermometers which instead measure the dielectric constant of strontium titanate (SrTiO3). SrTiO3 approaches a ferroelectric transition, causing its dielectric constant to increase by a few orders of magnitude at low temperature. As a result, these thermometers are very sensitive at low temperature while having very little dependence on the applied magnetic field, making them ideal for thermal Hall measurements. Here, we demonstrate this method by making measurements of the thermal Hall effect in Bismuth in magnetic fields of up to 10 T.
- Research Organization:
- Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); US Department of the Navy, Office of Naval Research (ONR); National Science Foundation (NSF); Heiwa Nakajima Foundation
- Grant/Contract Number:
- SC0008110; N00014-15-1-2382; ECCS-1307744; DMR-1428226; F031543
- OSTI ID:
- 1467830
- Alternate ID(s):
- OSTI ID: 1259741
- Journal Information:
- Applied Physics Letters, Vol. 108, Issue 26; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Modular thermal Hall effect measurement setup for fast-turnaround screening of materials over wide temperature range using capacitive thermometry
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journal | October 2019 |
Quantum critical phenomena in a compressible displacive ferroelectric
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journal | May 2020 |
Quantum critical phenomena in a compressible displacive ferroelectric
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text | January 2020 |
Quantum Critical Phenomena in a Compressible Displacive Ferroelectric | text | January 2018 |
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