Metallization of Quantum Material GaTa4Se8 at High Pressure
| Autor: | Qingyang Hu, Bijuan Chen, Shuai Zhang, Takeshi Nakagawa, Xinguo Hong, Hongshan Deng, Hai-Qing Lin, Hongming Weng, Ji-Chang Ren, Xia Yin, Dong Wang, Jianbo Zhang, Yang Ding, Jun Chang, Ho-kwang Mao, Min Yong Jeong, Raimundas Sereika, Hong Xiao, Myung Joon Han |
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| Rok vydání: | 2021 |
| Předmět: |
Superconductivity
Materials science Condensed matter physics Band gap Magnetism Mott insulator 02 engineering and technology Quantum phases 021001 nanoscience & nanotechnology 01 natural sciences Phase (matter) 0103 physical sciences Condensed Matter::Strongly Correlated Electrons General Materials Science Physical and Theoretical Chemistry 010306 general physics 0210 nano-technology Quantum Phase diagram |
| Zdroj: | The Journal of Physical Chemistry Letters. 12:5601-5607 |
| ISSN: | 1948-7185 |
| DOI: | 10.1021/acs.jpclett.1c01069 |
| Popis: | Pressure is a unique thermodynamic variable to explore the phase competitions and novel phases inaccessible at ambient conditions. The resistive switching material GaTa4Se8 displays several quantum phases under pressure, such as a Jeff = 3/2 Mott insulator, a correlated quantum magnetic metal, and d-wave topological superconductivity, which has recently drawn considerable interest. Using high-pressure Raman spectroscopy, X-ray diffraction, extended X-ray absorption, transport measurements, and theoretical calculations, we reveal a complex phase diagram for GaTa4Se8 at pressures exceeding 50 GPa. In this previously unattained pressure regime, GaTa4Se8 ranges from a Mott insulator to a metallic phase and exhibits superconducting phases. In contrast to previous studies, we unveil a hidden correlation between the structural distortion and band gap prior to the insulator-to-metal transition, and the metallic phase shows superconductivity with structural and magnetic properties that are distinctive from the lower-pressure phase. These discoveries highlight that GaTa4Se8 is a unique material to probe novel quantum phases from a structural, metallicity, magnetism, and superconductivity perspective. |
| Databáze: | OpenAIRE |
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