Evidence for Topologically Protected Surface States and a Superconducting Phase in [Tl4](Tl1−xSnx)Te3Using Photoemission, Specific Heat, and Magnetization Measurements, and Density Functional Theory
K. E. Arpino, D. C. Wallace, Y. F. Nie, T. Birol, P. D. C. King, S. Chatterjee, M. Uchida, S. M. Koohpayeh, J.-J. Wen, K. Page, C. J. Fennie, K. M. Shen, T. M. McQueen
DOI 10.1103/PhysRevLett.112.017002 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We report the discovery of surface states in the perovskite superconductor [Tl4]TlTe3 (Tl5Te3) and its nonsuperconducting tin-doped derivative [Tl4](Tl0.4Sn0.6)Te3 as observed by angle-resolved photoemission spectroscopy. Density functional theory calculations predict that the surface states are protected by a Z2 topology of the bulk band structure. Specific heat and magnetization measurements show that Tl5Te3 has a superconducting volume fraction in excess of 95%. Thus Tl5Te3 is an ideal material in which to study the interplay of bulk band topology and superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl5Te3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.4 | Pressure not reported | unknown |
| Tl5Te3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.4 | Pressure not reported | unknown |
Similar papers
Electronic and topological properties of the van der Waals layered superconductor PtTe
similarity 0.90Michael A. McGuire et al.
Source status unknown — claims are unverified
Superconducting properties and gap structure of the topological superconductor candidate Ti3Sb
similarity 0.89R. Chapai et al.
Source status unknown — claims are unverified
Fermiology of possible topological superconductor Tl0.5Bi2Te3 derived from hole-doped topological insulator
similarity 0.89C. X. Trang et al.
Source status unknown — claims are unverified
Specific-heat measurements on superconducting bi-ca-sr-cu and tl-ca-ba-cu oxides: absence of a linear term in the specific heat of bi-ca-sr-cu oxides
similarity 0.89R. A. Fisher et al.
Source status unknown — claims are unverified
Unconventional superconductivity in the nickel chalcogenide superconductor TlNi2Se2
similarity 0.89E. Jellyman et al.
Source status unknown — claims are unverified
Anomalous pressure dependence of the superconducting transition temperature in TlNi2Se2−xSx
similarity 0.89S. K. Goh et al.
Source status unknown — claims are unverified