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Chudzinski P, Berben M, Xu X, Wakeham N, Bernáth B, Duffy C, Hinlopen RDH, Hsu YT, Wiedmann S, Tinnemans P, Jin R, Greenblatt M, Hussey NE. Emergent symmetry in a low-dimensional superconductor on the edge of Mottness. Science 2023; 382:792-796. [PMID: 37972183 DOI: 10.1126/science.abp8948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 09/29/2023] [Indexed: 11/19/2023]
Abstract
Upon cooling, condensed-matter systems typically transition into states of lower symmetry. The converse-i.e., the emergence of higher symmetry at lower temperatures-is extremely rare. In this work, we show how an unusually isotropic magnetoresistance in the highly anisotropic, one-dimensional conductor Li0.9Mo6O17 and its temperature dependence can be interpreted as a renormalization group (RG) flow toward a so-called separatrix. This approach is equivalent to an emergent symmetry in the system. The existence of two distinct ground states, Mott insulator and superconductor, can then be traced back to two opposing RG trajectories. By establishing a direct link between quantum field theory and an experimentally measurable quantity, we uncover a path through which emergent symmetry might be identified in other candidate materials.
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Affiliation(s)
- P Chudzinski
- School of Mathematics and Physics, Queen's University Belfast, Belfast, UK
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland
| | - M Berben
- High Field Magnet Laboratory (HFML-EMFL), Radboud University, Nijmegen, Netherlands
- Institute for Molecules and Materials, Radboud University, Nijmegen, Netherlands
| | - Xiaofeng Xu
- Key Laboratory of Quantum Precision Measurement of Zhejiang Province, Department of Applied Physics, Zhejiang University of Technology, Hangzhou, China
| | - N Wakeham
- Center for Space Sciences and Technology, University of Maryland Baltimore, Baltimore, MD, USA
| | - B Bernáth
- High Field Magnet Laboratory (HFML-EMFL), Radboud University, Nijmegen, Netherlands
- Institute for Molecules and Materials, Radboud University, Nijmegen, Netherlands
| | - C Duffy
- High Field Magnet Laboratory (HFML-EMFL), Radboud University, Nijmegen, Netherlands
- Institute for Molecules and Materials, Radboud University, Nijmegen, Netherlands
| | - R D H Hinlopen
- H. H. Wills Physics Laboratory, University of Bristol, Bristol, UK
| | - Yu-Te Hsu
- High Field Magnet Laboratory (HFML-EMFL), Radboud University, Nijmegen, Netherlands
- Institute for Molecules and Materials, Radboud University, Nijmegen, Netherlands
| | - S Wiedmann
- High Field Magnet Laboratory (HFML-EMFL), Radboud University, Nijmegen, Netherlands
- Institute for Molecules and Materials, Radboud University, Nijmegen, Netherlands
| | - P Tinnemans
- Institute for Molecules and Materials, Radboud University, Nijmegen, Netherlands
| | - Rongying Jin
- Center for Experimental Nanoscale Physics, Department of Physics and Astronomy, University of South Carolina, Columbia, SC, USA
| | - M Greenblatt
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ, USA
| | - N E Hussey
- High Field Magnet Laboratory (HFML-EMFL), Radboud University, Nijmegen, Netherlands
- Institute for Molecules and Materials, Radboud University, Nijmegen, Netherlands
- H. H. Wills Physics Laboratory, University of Bristol, Bristol, UK
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