Pressure-induced magnetic collapse and metallization of $\mathrm{TlF}{\mathrm{e}}_{1.6}\mathrm{S}{\mathrm{e}}_2$

Abstract

The crystal structure, magnetic ordering, and electrical resistivity of TlFe1.6Se2 were studied at high pressures. Below ~7 GPa, TlFe1.6Se2 is an antiferromagnetically ordered semiconductor with a ThCr2Si2-type structure. The insulator-to-metal transformation observed at a pressure of ~ 7 GPa is accompanied by a loss of magnetic ordering and an isostructural phase transition. In the pressure range ~ 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.

arXiv comment12 pages, 5 figures

References in corpus (21)

• Why Does Undoped FeSe Become A High Tc Superconductor Under Pressure?
• Reemerging superconductivity at 48 K across quantum criticality in iron chalcogenides
• Superconductivity at 32 K in single crystal Rb${}_{0.78}$Fe${}_2$Se${}_{1.78}$}
• Synthesis and crystal growth of Cs0.8(FeSe0.98)2: a new iron-based superconductor with Tc=27K
• Nanoscale phase separation in the iron chalcogenide superconductor K0.8Fe1.6Se2 as seen via scanning nanofocused x-ray diffraction
• Coexistence of Magnetism and Superconductivity in the Iron-based Compound Cs_0.8(FeSe_0.98)_2
• Intrinsic phase separation in superconducting K0.8Fe1.6Se2 (Tc= 31.8 K) single crystals
• Anomalous Compressibility Effects and Superconductivity in EuFe2As2 under High Pressures
• Suppression of antiferromagnetic spin fluctuations in the collapsed tetragonal phase of CaFe2As2
• Anisotropic magnetism, superconductivity, and the phase diagram of Rb(1-x)Fe(2-y)Se2
• Pressure Induced Metallization of BaMn2As2
• Spin reorientation in TlFe1.6Se2 with complete vacancy ordering
• Interplay between Superconductivity and Magnetism in Rb0.8Fe1.6Se2 under Pressure
• Electronic Structure and Mott Localization in Iron Deficient TlFe${}_{1.5}$Se${}_2$ with Superstructures
• Formation of Collapsed Tetragonal Phase in EuCo2As2 under High Pressure
• Unusual Phase Transitions and Magnetoelastic Coupling in TlFe1.6Se2 Single Crystals
• Pressure cycle of superconducting Cs0.8Fe2Se2: a transport study
• Intercalation effect on hyperfine parameters of Fe in FeSe superconductor with Tc = 42 K
• Evolution of the nuclear and magnetic structures of TlFe1.6Se2 with temperature
• Compressibility and pressure-induced disorder in superconducting phase-separated Cs0.72Fe1.57Se2
• High-pressure single-crystal neutron scattering study of magnetic and Fe vacancy orders in (Tl,Rb)2Fe4Se5 superconductor