globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2021.05.023
论文题名:
Observation of thickness-tuned universality class in superconducting β-W thin films
作者: Huang C.; Zhang E.; Zhang Y.; Zhang J.; Xiu F.; Liu H.; Xie X.; Ai L.; Yang Y.; Zhao M.; Qi J.; Li L.; Liu S.; Li Z.; Zhan R.; Bie Y.-Q.; Kou X.; Deng S.; Xie X.C.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
语种: 英语
中文关键词: Quantum criticality ; quantum Griffiths singularity ; Quenched disorder ; Universality class
英文摘要: The interplay between quenched disorder and critical behavior in quantum phase transitions is conceptually fascinating and of fundamental importance for understanding phase transitions. However, it is still unclear whether or not the quenched disorder influences the universality class of quantum phase transitions. More crucially, the absence of superconducting-metal transitions under in-plane magnetic fields in 2D superconductors imposes constraints on the universality of quantum criticality. Here, we observe the thickness-tuned universality class of superconductor-metal transition by changing the disorder strength in β-W films with varying thickness. The finite-size scaling uncovers the switch of universality class: quantum Griffiths singularity to multiple quantum criticality at a critical thickness of tc⊥1~8nm and then from multiple quantum criticality to single criticality at tc⊥2~16nm. Moreover, the superconducting-metal transition is observed for the first time under in-plane magnetic fields and the universality class is changed at tc‖~8nm. The observation of thickness-tuned universality class under both out-of-plane and in-plane magnetic fields provides broad information for the disorder effect on superconducting-metal transitions and quantum criticality. © 2020 Science China Press
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170274
Appears in Collections:气候变化与战略

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作者单位: State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, 200433, China; Zhangjiang Fudan International Innovation Center, Fudan University, Shanghai, 201210, China; School of Information Science and Technology, ShanghaiTech University, Shanghai, 201210, China; Anhui Province Key Laboratory of Condensed Matter Physics at ExtremeConditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, 230031, China; Collaborative Innovation Center of Advanced Microstructures, Nanjing, 210093, China; Shanghai Research Center for Quantum Sciences, Shanghai, 201315, China; Center for Advanced Quantum Studies, Department of Physics, Beijing Normal University, Beijing, 100875, China; Beijing Academy of Quantum Information Sciences, Beijing, 100193, China; State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, 510275, China; International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, China; CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing, 100190, China

Recommended Citation:
Huang C.,Zhang E.,Zhang Y.,et al. Observation of thickness-tuned universality class in superconducting β-W thin films[J]. Science Bulletin,2021-01-01
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