Probing Quantum Phases in Ultra-High-Mobility Two-Dimensional Electron Systems Using Surface Acoustic Waves

• DOI: 10.1103/physrevlett.132.076501
• Publication Date: 2024-02-12T15:01:57Z
• Authors: Mengmeng Wu; Xiao Liu; Renfei Wang; Yoon Jang Chung; Adbhut Gupta; Kirk W. Baldwin; Loren Pfeiffer; Xi Lin; Yang Liu
• Keywords: Condensed Matter - Strongly Correlated Electrons; Condensed Matter - Mesoscale and Nanoscale Physics; Strongly Correlated Electrons (cond-mat.str-el); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); FOS: Physical sciences

Transport measurement, which applies an electric field and studies the migration of charged particles, i.e., current, is most widely used technique in condensed matter studies. It generally assumed that quantum phase remains unchanged when it hosts a sufficiently small probing is, surprisingly, rarely examined experimentally. In this Letter, we study ultra-high-mobility two-dimensional electron system using propagating surface acoustic wave, whose traveling speed affected by electrons' compressibility. The power our Letter several orders magnitude lower than previous reports, its induced perturbation to smaller transport current. Therefore are able observe phases become more incompressible hosting perturbative current.Received 5 July 2023Revised 21 November 2023Accepted 16 January 2024DOI:https://doi.org/10.1103/PhysRevLett.132.076501© 2024 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasFractional Hall effectInteger effectQuantum effectPhysical SystemsTwo-dimensional systemTechniquesSurface waveCondensed Matter, Materials & Applied Physics