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Title: Superconducting Bi2Te: Pressure-induced universality in the (Bi2)m(Bi2Te3)n series

Journal Article · · Physical Review B
 [1];  [1];  [1];  [1];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Alabama, Birmingham, AL (United States)

Using high-pressure magnetotransport techniques we have discovered superconductivity in Bi2Te, a member of the infinitely adaptive (Bi2)m(Bi2Te3)n 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 Werthamer-Helfand-Hohenberg limit, even in the extreme spin-orbit scattering limit, yet is consistent with other strong spin-orbit materials. Furthermore, 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.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC52-07NA27344; NA0001974; FG02-99ER45775; AC02-06CH11357; NA0002014
OSTI ID:
1247284
Report Number(s):
LLNL-JRNL--679788
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 9 Vol. 93; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (52)

Elektron und Gravitation. I journal May 1929
On the systematics of high Tc in transition metal materials journal October 1971
McMillan's equation and the Tc of superconductors journal April 1972
Fault-tolerant quantum computation by anyons journal January 2003
Superconductivity in the niobium-rich compound Nb5Se4 journal November 2015
Pressure-Induced Disordered Substitution Alloy in Sb 2 Te 3 journal November 2011
Compressibility of solids journal January 1987
Atom-specific spin mapping and buried topological states in a homologous series of topological insulators journal January 2012
Observation of a large-gap topological-insulator class with a single Dirac cone on the surface journal May 2009
Majorana returns journal September 2009
Crystal structure and chemistry of topological insulators journal January 2013
Epitaxial diamond encapsulation of metal microprobes for high pressure experiments journal November 2000
Calibration of the pressure dependence of the R 1 ruby fluorescence line to 195 kbar journal June 1975
On the temperature correction to the ruby pressure scale journal May 1991
Structural phase transition in Bi 2 Te 3 under high pressure journal May 2009
Two-dimensional detector software: From real detector to idealised image or two-theta scan journal January 1996
A universal equation of state for solids journal July 1986
Hydrostatic limits of 11 pressure transmitting media journal March 2009
Pressure and temperature dependence of electrical resistivity of Pb and Sn from 1-300K and 0-10 GPa-use as continuous resistive pressure monitor accurate over wide temperature range; superconductivity under pressure in Pb, Sn and In journal March 1981
Theory of Superconductivity journal December 1957
Temperature and Purity Dependence of the Superconducting Critical Field, H c 2 . III. Electron Spin and Spin-Orbit Effects journal July 1966
Effect of Pauli Paramagnetism on Magnetic Properties of High-Field Superconductors journal August 1966
Transition Temperature of Strong-Coupled Superconductors journal March 1968
High-pressure structural phase transitions in tellurium journal May 1988
Refinement of the equation of state of tantalum journal March 2004
Structure-dependent ferromagnetism in Au 4 V studied under high pressure journal November 2006
Topological invariants of time-reversal-invariant band structures journal March 2007
Structures and thermoelectric properties of the infinitely adaptive series ( Bi 2 ) m ( Bi 2 Te 3 ) n journal May 2007
Pressure-induced phase transition of Bi 2 Te 3 to a bcc structure journal March 2011
Phase diagram of a pressure-induced superconducting state and its relation to the Hall coefficient of Bi 2 Te 3 single crystals journal April 2011
Distinct superconducting states in the pressure-induced metallic structures of the nominal semimetal Bi 4 Te 3 journal September 2011
Superconductivity in the topological semimetal YPtBi journal December 2011
Superconductivity in noncentrosymmetric YPtBi under pressure journal August 2012
Topological semimetal in a Bi-Bi 2 Se 3 infinitely adaptive superlattice phase journal December 2012
Homologous series of layered structures in binary and ternary Bi-Sb-Te-Se systems: Ab initio study journal February 2014
Superconductivity in the topological insulator Bi 2 Te 3 under hydrostatic pressure journal September 2014
Superconducting Proximity Effect and Majorana Fermions at the Surface of a Topological Insulator journal March 2008
Superconductivity in Cu x Bi 2 Se 3 and its Implications for Pairing in the Undoped Topological Insulator journal February 2010
Substitutional Alloy of Bi and Te at High Pressure journal April 2011
Pressure-Induced Unconventional Superconducting Phase in the Topological Insulator Bi 2 Se 3 journal August 2013
Pressure Dependence of Superconducting Transition Temperature of High-Pressure Metallic Te journal June 1980
Z2 Topological Order and the Quantum Spin Hall Effect journal September 2005
Colloquium: Topological insulators journal November 2010
Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells journal December 2006
Quantum Spin Hall Insulator State in HgTe Quantum Wells journal November 2007
Observation of Unconventional Quantum Spin Textures in Topological Insulators journal February 2009
Experimental Realization of a Three-Dimensional Topological Insulator, Bi2Te3 journal June 2009
Discovery of a Weyl fermion semimetal and topological Fermi arcs journal July 2015
Superconductivity and magnetic order in the noncentrosymmetric half-Heusler compound ErPdBi journal October 2013
Topological Insulator Materials journal October 2013
Superconductivity at 6 K and the Violation of Pauli Limit in Ta 2 Pd x S 5 journal February 2014
Structural Phase Transitions in Selenium up to 150 GPa journal January 1993

Cited By (2)

Independence of topological surface state and bulk conductance in three-dimensional topological insulators journal November 2018
Universal superconductivity phase diagram for pressurized tetradymite topological insulators journal November 2018