• 文献标题:   Multifractal Conductance Fluctuations in High-Mobility Graphene in the Integer Quantum Hall Regime
  • 文献类型:   Article
  • 作  者:   AMIN KR, NAGARAJAN R, PANDIT R, BID A
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW LETTERS
  • ISSN:   0031-9007 EI 1079-7114
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1103/PhysRevLett.129.186802
  • 出版年:   2022

▎ 摘  要

We present the first experimental evidence for the multifractality of a transport property at a topological phase transition. In particular, we show that conductance fluctuations display multifractality at the integer quantum Hall plateau-to-plateau transitions in high-mobility mesoscopic graphene devices. The multi-fractality gets rapidly suppressed as the chemical potential moves away from these critical points. Our combination of experimental study and multifractal analysis provides a novel method for probing the criticality of wave functions at phase transitions in mesoscopic systems, and quantum criticality in several condensed-matter systems.