6533b85ffe1ef96bd12c23bb
RESEARCH PRODUCT
Pressure-induced magnetic collapse and metallization of TlFe1.6Se2
Claudia FelserS. A. MedvedevPavel G. NaumovPavel G. NaumovT. PalasyukVadim KsenofontovWalter SchnelleKai Alexander FilsingerO. I. BarkalovO. I. BarkalovMartha GreenblattSergii I. ShylinSergii I. ShylinYanpeng Qisubject
PhysicsSuperconductivityPhase transitionCondensed matter physicsCollapse (topology)02 engineering and technologyCrystal structure021001 nanoscience & nanotechnology01 natural sciencesPressure rangeElectrical resistivity and conductivity0103 physical sciencesIsostructural010306 general physics0210 nano-technologydescription
The crystal structure, magnetic ordering, and electrical resistivity of $\mathrm{TlF}{\mathrm{e}}_{1.6}\mathrm{S}{\mathrm{e}}_{2}$ were studied at high pressures. Below $\ensuremath{\sim}7\phantom{\rule{0.16em}{0ex}}\mathrm{GPa}$, $\mathrm{TlF}{\mathrm{e}}_{1.6}\mathrm{S}{\mathrm{e}}_{2}$ is an antiferromagnetically ordered semiconductor with a $\mathrm{ThC}{\mathrm{r}}_{2}\mathrm{S}{\mathrm{i}}_{2}$-type structure. The insulator-to-metal transformation observed at a pressure of $\ensuremath{\sim}7\phantom{\rule{0.16em}{0ex}}\mathrm{GPa}$ is accompanied by a loss of magnetic ordering and an isostructural phase transition. In the pressure range $\ensuremath{\sim}7.5\text{--}11\phantom{\rule{0.16em}{0ex}}\mathrm{GPa}$ 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-08-16 | Physical Review B |