Pressure effect on superconductivity in FeSe0.5Te0.5

Shylin SI, Ksenofontov V, Naumov PG, Medvedev SA, Tsurkan V, Deisenhofer J, Loidl A, Schoop LM, Palasyuk T, Wortmann G, Felser C (2017)

Publication Type: Journal article

Publication year: 2017

Journal

physica status solidi (b) Wiley

Book Volume: 254

Article Number: 1600161

Journal Issue: 1

DOI: 10.1002/pssb.201600161

Abstract

Due to the simple layered structure, isostructural FeSe and FeSe0.5Te0.5 are clue compounds for understanding the principal mechanisms of superconductivity in the family of Fe-based superconductors. High-pressure magnetic, structural and Mössbauer studies have been performed on single-crystalline samples of superconducting FeSe0.5Te0.5 with Tc = 13.5 K. Susceptibility data have revealed a strong increase of Tc up to 19.5 K for pressures up to 1.3 GPa, followed by a plateau in the Tc(p) dependence up to 5.0 GPa. Further pressure increase leads to a disappearance of the superconducting state around 7.0 GPa. X-ray diffraction and Mössbauer studies explain this fact by a tetragonal-to-hexagonal structural phase transition. Mössbauer parameters of the non-superconducting high-pressure phase indicate less covalency of FeSe bonds. Based on structural and susceptibility data, we conclude about a common character of Tc(p) diagrams for both FeSe and FeSe0.5Te0.5 superconductors.

Involved external institutions

Max-Planck-Institut für Festkörperforschung DE Germany (DE) Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Universität Augsburg DE Germany (DE) Polska Akademia Nauk (PAN) / Polish Academy of Sciences PL Poland (PL) Universität Paderborn DE Germany (DE)

How to cite

APA:

Shylin, S.I., Ksenofontov, V., Naumov, P.G., Medvedev, S.A., Tsurkan, V., Deisenhofer, J.,... Felser, C. (2017). Pressure effect on superconductivity in FeSe0.5Te0.5. physica status solidi (b), 254(1). https://doi.org/10.1002/pssb.201600161

MLA:

Shylin, Sergii I., et al. "Pressure effect on superconductivity in FeSe0.5Te0.5." physica status solidi (b) 254.1 (2017).

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