| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Pressure-Induced Metallization and Structural Phase Transition in the Quasi-One-Dimensional TlFeSe$_{2}$ |
| Zi-Yi Liu1,2†, Qing-Xin Dong1,3†, Peng-Fei Shan1,3†, Yi-Yan Wang1,3, Jian-Hong Dai1,3, Rajesh Jana1,3, Ke-Yu Chen1,3, Jian-Ping Sun1,3, Bo-Sen Wang1,3,4, Xiao-Hui Yu1,3,4, Guang-Tong Liu1,3,4, Yoshiya Uwatoko5, Yu Sui2, Huai-Xin Yang1,3,4, Gen-Fu Chen1,3,4**, Jin-Guang Cheng1,3,4** |
1Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190
2School of Physics, Harbin Institute of Technology, Harbin 150001
3School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190
4Songshan Lake Materials Laboratory, Dongguan 523808
5Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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| Cite this article: |
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Zi-Yi Liu, Qing-Xin Dong, Peng-Fei Shan et al 2020 Chin. Phys. Lett. 37 047102 |
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Abstract We report a comprehensive high-pressure study on the monoclinic TlFeSe$_{2}$ single crystal, which is an antiferromagnetic insulator with quasi-one-dimensional crystal structure at ambient pressure. It is found that TlFeSe$_{2}$ undergoes a pressure-induced structural transformation from the monoclinic phase to an orthorhombic structure above $P_{\rm c} \approx 13$ GPa, accompanied with a large volume collapse of $\Delta V/V_{0}=8.3{\%}$. In the low-pressure monoclinic phase, the insulating state is easily metallized at pressures above 2 GPa; while possible superconductivity with $T_{\rm c}^{\rm onset} \sim 2$ K is found to emerge above 30 GPa in the high-pressure phase. Such a great tunability of TlFeSe$_{2}$ under pressure indicates that the ternary $A$FeSe$_{2}$ system ($A$ = Tl, K, Cs, Rb) should be taken as an important platform for explorations of interesting phenomena such as insulator-metal transition, dimensionality crossover, and superconductivity.
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Received: 06 March 2020
Published: 13 March 2020
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| PACS: |
71.27.+a
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(Strongly correlated electron systems; heavy fermions)
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71.30.+h
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(Metal-insulator transitions and other electronic transitions)
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74.62.Fj
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(Effects of pressure)
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74.72.Cj
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(Insulating parent compounds)
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| Fund: Supported by the National Key R&D Program of China (2018YFA0305700), the National Natural Science Foundation of China (11904391, 11834016, 11874400, 11888101, 11921004), the Beijing Natural Science Foundation (Z190008), the Strategic Priority Research Program and the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences (XDB25000000, QYZDB-SSW-SLH013), and the CAS Interdisciplinary Innovation Team (JCTD-2019-01). JPS acknowledges the support from the China Postdoctoral Science Foundation and the Postdoctoral Innovative Talent Program. |
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