DataVXACS Materials LettersPaper
journal article·2021-02-01

Quantum Griffiths Singularity in a Layered Superconducting Organic–Inorganic Hybrid Superlattice

Yingcheng Zhao, Yueqi Su, Yuqiao Guo, Jing Peng, Jiyin Zhao, Chenyang Wang, Linjun Wang, Changzheng Wu, Yi Xie

ACS Materials Letters· Volume 3· Issue 2
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Source abstract

Abstract

Quantum Griffiths singularity (QGS) is among the remarkable phenomena induced by disorder in quantum phase transitions (QPTs). In recent years, experimental progresses have been made in ultrathin superconducting films. However, there is still lack of approaches to trigger QGS in bulk superconductors. Herein, we develop a charge-induced disorder introduction process to trigger QGS in organic-inorganic hybrid superlattices. Large-sized organic cations are intercalated into layered inorganic crystal, which leads to electron doping and thus quasi-two-dimensional superconductivity. The charge transfer between inorganic layers and interlayer cations introduces charge disorder into the hybrid superlattice without destroying lattice integrality. Consequently, QGS emerges in the bulk superconducting superlattice. Furthermore, deviation of phase boundary from the Werthamer–Helfand–Hohenberg theory indicates relatively strong spin-orbit coupling. The observation provides a new pathway to investigate QPTs in disordered systems and reveals universality of QGS in superconductors.
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Research context

OpenAlex topics: Electronic and Structural Properties of Oxides · Physics of Superconductivity and Magnetism · Advanced Condensed Matter Physics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230026, PR China

Institute of Energy, Hefei Comprehensive National Science Center, 350 Shushanhu Rd., Hefei 230031, PR China

Funding

University of Science and Technology of China · Ministry of Education of the People's Republic of China · Ministry of Science and Technology of the People's Republic of China · Youth Innovation Promotion Association of the Chinese Academy of Sciences · National Natural Science Foundation of China · Natural Science Foundation of Anhui Province · Chinese Academy of Sciences

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