Abstract
The structural, superconducting, and electronic phase diagram of [Tl4]Tl1−xSnxTe3 is reported. Magnetization and specific heat measurements show bulk superconductivity exists for 0 ≤ x ≤ 0.4. Resistivity measurements indicate a crossover from a metallic state at x = 0 to a doped insulator at x = 1. Universally, there is a large non-Debye specific heat contribution, characterized by an Einstein temperature of θE ≈ 35 K. Density functional theory calculations predict x = 0 to be a topological metal, while x = 1 is a topological crystalline insulator. The disappearance of superconductivity correlates with the transition between these distinct topological states.
Highlights
Magnetization and specific heat measurements show bulk superconductivity exists for 0 ≤ x ≤ 0.4
With the discovery of topological insulators, the importance of spin-orbit coupling in driving electronic phenomena has moved to the forefront of condensed matter physics[1,2,3]
Breaking timereversal or inversion symmetry in a crystalline material can lift Kramer’s degeneracy of spins, resulting chiral locking of spin and momentum displayed by topological features such as Dirac cones in the surface states of topological insulators and, more recently, in the three-dimensional cone of Dirac semimetals[4,5,6,7,8,9]
Summary
With the discovery of topological insulators, the importance of spin-orbit coupling in driving electronic phenomena has moved to the forefront of condensed matter physics[1,2,3]. Superconducting Dome and Crossover to an Insulating State in [Tl4]Tl1-xSnxTe3 The structural, superconducting, and electronic phase diagram of [Tl4]Tl1-xSnxTe3 is reported.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
