Superconductivity in semimetallic
Abstract
We report in this paper a further investigation on the thermodynamic and transport properties, and an assessment of theoretical calculations, for the BiS2-layered Bi3O2S3 superconductor. The polycrystalline sample is synthesized with a superconducting transition temperature of Tconset=5.75K and Tczero=4.03K (≈Tcmag) that drops to 3.3 K by applying a hydrostatic pressure of 6 kbar. Density-of-states (DOS) calculations give substantial hybridization between Bi, O, and S, with Bi the largest component of DOS, which supports the idea that the BiS2 layer is relevant for producing electron-phonon coupling. An analysis of previously published specific heat data for Bi3O2S3 is additionally suggestive of a strong electron-phonon interaction in the Bi-O-S system. The analysis of the Seebeck coefficient results strongly suggests that Bi3O2S3 is a semimetal. In fact, we found the semimetallic or narrow band gap behavior may occur in certain other materials in the BiS2-layered class of materials, such as Bi4O4S3.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
- Ecole Polytechnique Federale Lausanne (Switzlerland). Laboratory for Quantum Magnetism (LQM)
- Ecole Polytechnique Federale Lausanne (Switzlerland). Laboratory for Quantum Magnetism (LQM); Ecole Polytechnique Federale Lausanne (Switzlerland). Laboratory of Physics of Complex Matter
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1265433
- Alternate Identifier(s):
- OSTI ID: 1180544
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. B, Condensed Matter and Materials Physics
- Additional Journal Information:
- Journal Volume: 91; Journal Issue: 10; Journal ID: ISSN 1098-0121
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Li, L., Parker, D., Babkevich, P., Yang, L., Ronnow, H. M., and Sefat, A. S. Superconductivity in semimetallic Bi3O2S3. United States: N. p., 2015.
Web. doi:10.1103/PhysRevB.91.104511.
Li, L., Parker, D., Babkevich, P., Yang, L., Ronnow, H. M., & Sefat, A. S. Superconductivity in semimetallic Bi3O2S3. United States. https://doi.org/10.1103/PhysRevB.91.104511
Li, L., Parker, D., Babkevich, P., Yang, L., Ronnow, H. M., and Sefat, A. S. Thu .
"Superconductivity in semimetallic Bi3O2S3". United States. https://doi.org/10.1103/PhysRevB.91.104511. https://www.osti.gov/servlets/purl/1265433.
@article{osti_1265433,
title = {Superconductivity in semimetallic Bi3O2S3},
author = {Li, L. and Parker, D. and Babkevich, P. and Yang, L. and Ronnow, H. M. and Sefat, A. S.},
abstractNote = {We report in this paper a further investigation on the thermodynamic and transport properties, and an assessment of theoretical calculations, for the BiS2-layered Bi3O2S3 superconductor. The polycrystalline sample is synthesized with a superconducting transition temperature of Tconset=5.75K and Tczero=4.03K (≈Tcmag) that drops to 3.3 K by applying a hydrostatic pressure of 6 kbar. Density-of-states (DOS) calculations give substantial hybridization between Bi, O, and S, with Bi the largest component of DOS, which supports the idea that the BiS2 layer is relevant for producing electron-phonon coupling. An analysis of previously published specific heat data for Bi3O2S3 is additionally suggestive of a strong electron-phonon interaction in the Bi-O-S system. The analysis of the Seebeck coefficient results strongly suggests that Bi3O2S3 is a semimetal. In fact, we found the semimetallic or narrow band gap behavior may occur in certain other materials in the BiS2-layered class of materials, such as Bi4O4S3.},
doi = {10.1103/PhysRevB.91.104511},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 10,
volume = 91,
place = {United States},
year = {Thu Mar 12 00:00:00 EDT 2015},
month = {Thu Mar 12 00:00:00 EDT 2015}
}
Web of Science
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