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Quantum Griffiths singularity of superconductor-metal transition in Ga thin films.

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Title: Quantum Griffiths singularity of superconductor-metal transition in Ga thin films.
Authors: Ying Xing, Hui-Min Zhang, Hai-Long Fu, Haiwen Liu, Yi Sun, Jun-Ping Peng, Fa Wang, Xi Lin, Xu-Cun Ma, Qi-Kun Xue, Jian Wang, X. C. Xie
Source: Science (pre-March 2025). 10/30/2015, Vol. 350 Issue 6260, p542-545. 4p.
Subjects: Superconducting transitions, Quantum theory, Gallium, Magnetoresistance, Low temperatures, Metals at low temperatures, Superconductivity, Charts, diagrams, etc.
Abstract: The Griffiths singularity in a phase transition, caused by disorder effects, was predicted more than 40 years ago. Its signature, the divergence of the dynamical critical exponent, is challenging to observe experimentally. We report the experimental observation of the quantum Griffiths singularity in a two-dimensional superconducting system. We measured the transport properties of atomically thin gallium films and found that the films undergo superconductor-metal transitions with increasing magnetic field. Approaching the zerotemperature quantum critical point, we observed divergence of the dynamical critical exponent, which is consistent with the Griffiths singularity behavior. We interpret the observed superconductor-metal quantum phase transition as the infinite-randomness critical point, where the properties of the system are controlled by rare large superconducting regions. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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DbLabel: Psychology and Behavioral Sciences Collection
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PubType: Academic Journal
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  Data: Quantum Griffiths singularity of superconductor-metal transition in Ga thin films.
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  Data: <searchLink fieldCode="AR" term="%22Ying+Xing%22">Ying Xing</searchLink><br /><searchLink fieldCode="AR" term="%22Hui-Min+Zhang%22">Hui-Min Zhang</searchLink><br /><searchLink fieldCode="AR" term="%22Hai-Long+Fu%22">Hai-Long Fu</searchLink><br /><searchLink fieldCode="AR" term="%22Haiwen+Liu%22">Haiwen Liu</searchLink><br /><searchLink fieldCode="AR" term="%22Yi+Sun%22">Yi Sun</searchLink><br /><searchLink fieldCode="AR" term="%22Jun-Ping+Peng%22">Jun-Ping Peng</searchLink><br /><searchLink fieldCode="AR" term="%22Fa+Wang%22">Fa Wang</searchLink><br /><searchLink fieldCode="AR" term="%22Xi+Lin%22">Xi Lin</searchLink><br /><searchLink fieldCode="AR" term="%22Xu-Cun+Ma%22">Xu-Cun Ma</searchLink><br /><searchLink fieldCode="AR" term="%22Qi-Kun+Xue%22">Qi-Kun Xue</searchLink><br /><searchLink fieldCode="AR" term="%22Jian+Wang%22">Jian Wang</searchLink><br /><searchLink fieldCode="AR" term="%22X%2E+C%2E+Xie%22">X. C. Xie</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 10/30/2015, Vol. 350 Issue 6260, p542-545. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Superconducting+transitions%22">Superconducting transitions</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+theory%22">Quantum theory</searchLink><br /><searchLink fieldCode="DE" term="%22Gallium%22">Gallium</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetoresistance%22">Magnetoresistance</searchLink><br /><searchLink fieldCode="DE" term="%22Low+temperatures%22">Low temperatures</searchLink><br /><searchLink fieldCode="DE" term="%22Metals+at+low+temperatures%22">Metals at low temperatures</searchLink><br /><searchLink fieldCode="DE" term="%22Superconductivity%22">Superconductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Charts%2C+diagrams%2C+etc%2E%22">Charts, diagrams, etc.</searchLink>
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  Data: The Griffiths singularity in a phase transition, caused by disorder effects, was predicted more than 40 years ago. Its signature, the divergence of the dynamical critical exponent, is challenging to observe experimentally. We report the experimental observation of the quantum Griffiths singularity in a two-dimensional superconducting system. We measured the transport properties of atomically thin gallium films and found that the films undergo superconductor-metal transitions with increasing magnetic field. Approaching the zerotemperature quantum critical point, we observed divergence of the dynamical critical exponent, which is consistent with the Griffiths singularity behavior. We interpret the observed superconductor-metal quantum phase transition as the infinite-randomness critical point, where the properties of the system are controlled by rare large superconducting regions. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1126/science.aaa7154
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        Text: English
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      – SubjectFull: Gallium
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      – TitleFull: Quantum Griffiths singularity of superconductor-metal transition in Ga thin films.
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              Text: 10/30/2015
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              Y: 2015
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