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- W4308504574 abstract "We report on the crystal structure and electronic properties under high pressure up to 11 GPa on a heavy fermion superconductor UTe2, as investigated by means of x-ray diffraction and electrical resistivity experiments. The x-ray diffraction measurements under high pressure using a synchrotron light source reveal anisotropic linear compressibility of the unit cell up to 3.5 GPa, while a pressure-induced structural phase transition is observed above 3.5-4 GPa at room temperature, where the body-centered orthorhombic crystal structure with the space group Immm changes into a body-centered tetragonal structure with the space group I4/mmm. The molar volume drops abruptly at the critical pressure of the structural transition, while the distance between the first-nearest neighbor of U atoms abruptly increases, implying a switch from the heavy electronic states to the weakly correlated electronic states. Surprisingly, a new superconducting phase at high pressures above 7 GPa was detected at Tsc > 2 K with a relatively low upper-critical field, Hc2(0). The resistivity above 3.5 GPa, thus in the high-pressure tetragonal phase, shows a large drop below 230 K, revealing a drastic change from the heavy electronic states to the weakly correlated state." @default.
- W4308504574 created "2022-11-12" @default.
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- W4308504574 date "2022-11-04" @default.
- W4308504574 modified "2023-09-26" @default.
- W4308504574 title "Pressure-induced structural phase transition and new superconducting phase in UTe2" @default.
- W4308504574 doi "https://doi.org/10.48550/arxiv.2211.02361" @default.
- W4308504574 hasPublicationYear "2022" @default.
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