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Pressure induced insulator to metal transition in quantum spin liquid candidate NaYbS2 |
| Yating Jia(贾雅婷)1,2,†, Chunsheng Gong(龚春生)3,†, Zhiwen Li(李芷文)1, Yixuan Liu(刘以轩)3, Jianfa Zhao(赵建发)1, Zhe Wang(王哲)4, Hechang Lei(雷和畅)3,‡, Runze Yu(于润泽)5,§, and Changqing Jin(靳常青)1,6,¶ |
1 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 Xi'an Modern Chemistry Research Institute, Xi'an 710065, China;
3 Laboratory for Neutron Scattering, and Beijing Key Laboratory of Optoelectronic Functional Materials MicroNano Devices, Department of Physics, Renmin University of China, Beijing 100872, China;
4 College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, China;
5 Center for High-Pressure Science and Technology Advanced Research, Beijing 100094, China;
6 University of Chinese Academy of Sciences, Beijing 100190, China |
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Abstract Pressure induced insulator to metal transition followed by the appearance of superconductivity has been observed recently in inorganic quantum spin liquid candidate NaYbSe2. In this paper, we study the properties of isostructural compound NaYbS2 under pressure. It is found that the resistance of NaYbS2 single crystal exhibits an insulating state below 82.9 GPa, but with a drop of more than six orders of magnitude at room temperature. Then a minimum of resistance is observed at about 100.1 GPa and it moves to lower temperature with further compression. Finally, a metallic state in the whole temperature range is observed at about 130.3 GPa accompanied by a non-Fermi liquid behavior below 100 K. The insulator to metal transition, non-monotonic resistance feature and non-Fermi liquid behavior of NaYbS2 under pressure are similar to those of NaYbSe2, suggesting that these phenomena might be the universal properties in NaLnCh2 (Ln = rare earth, Ch = O, S, Se) system.
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Received: 20 February 2023
Revised: 23 April 2023
Accepted manuscript online: 25 April 2023
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PACS:
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62.50.-p
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(High-pressure effects in solids and liquids)
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| Fund: Project supported by the National Key Research and Development Program of China (Grant Nos. 2018YFA0305700, 2018YFE0202600, and 2022YFA1403800), the Beijing Natural Science Foundation (Grant Nos. 2202059 and Z200005), the National Natural Science Foundation of China (Grant Nos. 22171283 and 12274459), the Hebei Natural Science Foundation (Grant No. B2020205040), and the Beijing National Laboratory for Condensed Matter Physics. |
Corresponding Authors:
Hechang Lei, Runze Yu, Changqing Jin
E-mail: hlei@ruc.edu.cn;runze.yu@hpstar.ac.cn;runze.yu@hpstar.ac.cn
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Cite this article:
Yating Jia(贾雅婷), Chunsheng Gong(龚春生), Zhiwen Li(李芷文), Yixuan Liu(刘以轩), Jianfa Zhao(赵建发), Zhe Wang(王哲), Hechang Lei(雷和畅), Runze Yu(于润泽), and Changqing Jin(靳常青) Pressure induced insulator to metal transition in quantum spin liquid candidate NaYbS2 2023 Chin. Phys. B 32 096201
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