Superconducting Bi2Te: Pressure-induced universality in the (Bi2)m(Bi2Te3)n series
Abstract
Using high-pressure magnetotransport techniques we have discovered superconductivity in Bi2Te, a member of the infinitely adaptive (Bi2)n(Bi2Te3)m series, whose end members, Bi and Bi2Te3, can be tuned to display topological surface states or superconductivity. Bi2Te has a maximum Tc= 8.6 K at P= 14.5 GPa and goes through multiple high pressure phase transitions, ultimately collapsing into a bcc structure that suggests a universal behavior across the series. High-pressure magnetoresistance and Hall measurements suggest a semi-metal to metal transition near 5.4 GPa, which accompanies the hexagonal to intermediate phase transition seen via x-ray diffraction measurements. In addition, the linearity of Hc2(T) exceeds the WHH limit, even in the extreme spin-orbit scattering limit, yet is consistent with other strong spin-orbit materials. Considering these results in combination with similar reports on strong spin-orbit scattering materials seen in the literature, we suggest the need for a new theory that can address the unconventional nature of their superconducting states.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Univ. of Alabama, Birmingham, AL (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Carnegie Inst. of Science, Washington, DC (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1247284
- Alternate Identifier(s):
- OSTI ID: 1242586; OSTI ID: 1364610
- Report Number(s):
- LLNL-JRNL-679788
Journal ID: ISSN 2469-9950; PRBMDO
- Grant/Contract Number:
- AC52-07NA27344; NA0001974; FG02-99ER45775; AC02-06CH11357; NA0002014; 14-ERD-041; AC52- 07NA27344; NA0002006
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 93; Journal Issue: 9; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Stillwell, Ryan L., Jeffries, Jason R., Jenei, Zsolt, Weir, Samuel T., and Vohra, Yogesh K. Superconducting Bi2Te: Pressure-induced universality in the (Bi2)m(Bi2Te3)n series. United States: N. p., 2016.
Web. doi:10.1103/PhysRevB.93.094511.
Stillwell, Ryan L., Jeffries, Jason R., Jenei, Zsolt, Weir, Samuel T., & Vohra, Yogesh K. Superconducting Bi2Te: Pressure-induced universality in the (Bi2)m(Bi2Te3)n series. United States. https://doi.org/10.1103/PhysRevB.93.094511
Stillwell, Ryan L., Jeffries, Jason R., Jenei, Zsolt, Weir, Samuel T., and Vohra, Yogesh K. Wed .
"Superconducting Bi2Te: Pressure-induced universality in the (Bi2)m(Bi2Te3)n series". United States. https://doi.org/10.1103/PhysRevB.93.094511. https://www.osti.gov/servlets/purl/1247284.
@article{osti_1247284,
title = {Superconducting Bi2Te: Pressure-induced universality in the (Bi2)m(Bi2Te3)n series},
author = {Stillwell, Ryan L. and Jeffries, Jason R. and Jenei, Zsolt and Weir, Samuel T. and Vohra, Yogesh K.},
abstractNote = {Using high-pressure magnetotransport techniques we have discovered superconductivity in Bi2Te, a member of the infinitely adaptive (Bi2)n(Bi2Te3)m series, whose end members, Bi and Bi2Te3, can be tuned to display topological surface states or superconductivity. Bi2Te has a maximum Tc= 8.6 K at P= 14.5 GPa and goes through multiple high pressure phase transitions, ultimately collapsing into a bcc structure that suggests a universal behavior across the series. High-pressure magnetoresistance and Hall measurements suggest a semi-metal to metal transition near 5.4 GPa, which accompanies the hexagonal to intermediate phase transition seen via x-ray diffraction measurements. In addition, the linearity of Hc2(T) exceeds the WHH limit, even in the extreme spin-orbit scattering limit, yet is consistent with other strong spin-orbit materials. Considering these results in combination with similar reports on strong spin-orbit scattering materials seen in the literature, we suggest the need for a new theory that can address the unconventional nature of their superconducting states.},
doi = {10.1103/PhysRevB.93.094511},
journal = {Physical Review B},
number = 9,
volume = 93,
place = {United States},
year = {Wed Mar 09 00:00:00 EST 2016},
month = {Wed Mar 09 00:00:00 EST 2016}
}
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