Pressure-induced magnetic collapse and metallization of TlF e1.6 S e2

P. G. Naumov, K. Filsinger, S. I. Shylin, O. I. Barkalov, V. Ksenofontov, Y. Qi, T. Palasyuk, W. Schnelle, S. A. Medvedev, M. Greenblatt, C. Felser

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The crystal structure, magnetic ordering, and electrical resistivity of TlFe1.6Se2 were studied at high pressures. Below ∼7GPa, TlFe1.6Se2 is an antiferromagnetically ordered semiconductor with a ThCr2Si2-type structure. The insulator-to-metal transformation observed at a pressure of ∼7GPa is accompanied by a loss of magnetic ordering and an isostructural phase transition. In the pressure range ∼7.5-11GPa a remarkable downturn in resistivity, which resembles a superconducting transition, is observed below 15 K. We discuss this feature as the possible onset of superconductivity originating from a phase separation in a small fraction of the sample in the vicinity of the magnetic transition.

Original languageEnglish (US)
Article number064109
JournalPhysical Review B
Issue number6
StatePublished - Aug 16 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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