Nanoscale measurement of Nernst effect in two-dimensional charge density wave material 1T-TaS2
- Univ. of Rochester, NY (United States); Argonne National Laboratory (ANL), Argonne, IL (United States). Materials Science Division
- Univ. of Rochester, NY (United States); Argonne National Laboratory (ANL), Argonne, IL (United States). Nanoscience and Technology Division; Univ. of Ottawa, Ottawa, ON (Canada). Dept. of Physics
- Argonne National Laboratory (ANL), Argonne, IL (United States). Materials Science Division and Nanoscience and Technology Division
Advances in nanoscale material characterization on two-dimensional van der Waals layered materials primarily involve their optical and electronic properties. The thermal properties of these materials are harder to access due to the difficulty of thermal measurements at the nanoscale. In this work, we create a nanoscale magnetothermal device platform to access the basic out-of-plane magnetothermal transport properties of ultrathin van der Waals materials. Specifically, the Nernst effect in the charge density wave transition metal dichalcogenide 1T-TaS2 is examined on nano-thin flakes in a patterned device structure. It is revealed that near the commensurate charge density wave (CCDW) to nearly commensurate charge density wave (NCCDW) phase transition, the polarity of the Nernst effect changes. Since the Nernst effect is especially sensitive to changes in the Fermi surface, this suggests that large changes are occurring in the out-of-plane electronic structure of 1T-TaS2, which are otherwise unresolved in just in-plane electronic transport measurements. This may signal a coherent evolution of out-of-plane stacking in the CCDW! NCCDW transition.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1422389
- Alternate ID(s):
- OSTI ID: 1410711
- Journal Information:
- Applied Physics Letters, Vol. 111, Issue 22; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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journal | January 2019 |
Observation of large anomalous Nernst effect in 2D layered materials Fe 3 GeTe 2
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journal | November 2019 |
Large magnetothermopower and anomalous Nernst effect in
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journal | September 2019 |
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