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Pressure-induced magnetic collapse and metallization of TlFe1.6Se2

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Naumov,  P. G.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Filsinger,  K.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Barkalov,  O. I.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Qi,  Y.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Schnelle,  W.
Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Medvedev,  S. A.
Sergiy Medvediev, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Felser,  C.
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Naumov, P. G., Filsinger, K., Shylin, S. I., Barkalov, O. I., Ksenofontov, V., Qi, Y., et al. (2017). Pressure-induced magnetic collapse and metallization of TlFe1.6Se2. Physical Review B, 96(6): 064109, pp. 1-7. doi:10.1103/PhysRevB.96.064109.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002D-D6C7-D
Abstract
The crystal structure, magnetic ordering, and electrical resistivity of TlFe1.6Se2 were studied at high pressures. Below similar to 7GPa, TlFe1.6Se2 is an antiferromagnetically ordered semiconductor with a ThCr2Si2-type structure. The insulator-to-metal transformation observed at a pressure of similar to 7GPa is accompanied by a loss of magnetic ordering and an isostructural phase transition. In the pressure range similar to 7.5-11 GPa 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.