| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Superconductor-Metal Quantum Transition at the EuO/KTaO$_{3}$ Interface |
| Yang Ma1†, Jiasen Niu1†, Wenyu Xing1, Yunyan Yao1, Ranran Cai1, Jirong Sun2,3, X. C. Xie1,4,5, Xi Lin1,4,5*, and Wei Han1* |
1International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China
2Beijing National Laboratory for Condensed Matter Physics & Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
4CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
5Beijing Academy of Quantum Information Sciences, Beijing 100193, China
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| Cite this article: |
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Yang Ma, Jiasen Niu, Wenyu Xing et al 2020 Chin. Phys. Lett. 37 117401 |
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Abstract We report the experimental investigation of the superconductor-metal quantum phase transition of the EuO/KTaO$_{3}$ interface. Around the transition, a divergence of the dynamical critical exponent is observed, which supports the quantum Griffiths singularity in the EuO/KTaO$_{3}$ interface. The quantum Griffiths singularity could be attributed to large rare superconducting regions and quenched disorders at the interface. Our results could pave the way for studying the exotic superconducting properties at the EuO/KTaO$_{3}$ interface.
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Received: 23 September 2020
Published: 08 November 2020
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| PACS: |
74.78.-w
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(Superconducting films and low-dimensional structures)
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73.40.-c
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(Electronic transport in interface structures)
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73.43.Nq
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(Quantum phase transitions)
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| Fund: Supported by the National Key R&D Program of China (Grant Nos. 2019YFA0308401 and 2017YFA0303301), the National Natural Science Foundation of China (Grant Nos. 11974025, 11674009, and 11934016), the Beijing Natural Science Foundation (Grant No. 1192009), and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB28000000). |
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