Pressure effect and superconductivity in the β−Bi4I4 topological insulator
A. Pisoni, R. Gaál, A. Zeugner, V. Falkowski, A. Isaeva, H. Huppertz, G. Autès, O. V. Yazyev, L. Forró
DOI 10.1103/PhysRevB.95.235149 · Physical Review B
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 a detailed study of the transport properties of a β−Bi4I4 quasi-one-dimensional topological insulator. Electrical resistivity, thermoelectric power, thermal conductivity, and Hall coefficient measurements are consistent with the possible appearance of a charge-density-wave order at low temperatures. Both electrons and holes contribute to the conduction in β−Bi4I4 and the dominant type of charge carrier changes with temperature as a consequence of temperature-dependent carrier densities and mobilities. Measurements of resistivity and Seebeck coefficient under hydrostatic pressure up to 2 GPa show a shift of the charge-density-wave order to higher temperatures suggesting a strongly one-dimensional character at ambient pressure. Surprisingly, superconductivity is induced in β−Bi4I4 above 10 GPa with Tc of 4.0 K which is slightly decreasing upon increasing the pressure up to 20 GPa. Chemical characterization of the pressure-treated samples shows amorphization of β−Bi4I4 under pressure and rules out decomposition into Bi and BiI3 at room-temperature conditions.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi4I4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4 | 10 GPa | unknown |
Similar papers
Pressure-induced superconductivity and topological quantum phase transitions in a quasi-one-dimensional topological insulator: Bi4I4
similarity 0.96Yanpeng Qi et al. · 2017 · arXiv:1701.08860
Source status unknown — claims are unverified
Pressure-driven superconductivity in the topological insulator GeBi4Te7
similarity 0.93Yalei Huang et al.
Source status unknown — claims are unverified
Distinct superconducting states in the pressure-induced metallic structures of the nominal semimetal Bi4Te3
similarity 0.92J. R. Jeffries et al.
Source status unknown — claims are unverified
Pressure-induced superconductivity in the photoelectric semiconductor BiSeI
similarity 0.91Chao An et al.
Source status unknown — claims are unverified
Pressure-induced irreversible evolution of superconductivity in PdBi2
similarity 0.91Ying Zhou et al.
Source status unknown — claims are unverified
Superconductivity in the topological insulator Bi2Te3 under hydrostatic pressure
similarity 0.91K. Matsubayashi et al.
Source status unknown — claims are unverified