Collapse of edge reconstruction in compressible quantum Hall fluid within filling fraction range 2 3 to 1
Year: 2025
Type: article
Abstract: The edge structure of a gate-defined compressible quantum Hall fluid in the filling fraction range $\frac{2}{3}$ to 1 is studied using the three reconstructed ${e}^{2}/3h$ fractional edge modes of a unity filling integer quantum Hall state. We find that the individually excited partially resolved ${e}^{2}/3h$ edge modes of the bulk state equilibrate completely even at higher magnetic field when passing through the gate-defined compressible fluid with filling between $\frac{2}{3}$ and 1. This result is unexpected because edge reconstruction at the smooth boundary is generally expected due to dominant incompressibility at filling $\frac{2}{3}$ and $\frac{1}{3}$. Recently, such a reconstructed edge mode has been reported for the compressible fluid in the filling fraction range $\frac{1}{3}$ to $\frac{2}{3}$. In contrast, equilibration of fractional edge modes in the compressible fluid within the filling fraction range $\frac{2}{3}$ to 1 becomes faster with increasing magnetic field. This anomalous result will stimulate further investigations on edge structure in these complex many-body systems.
DOI: 10.1103/txxb-47vd
Authors: Suvankar Purkait, Tanmay Maiti, Pooja Agarwal, Suparna Sahoo, Giorgio Biasiol, Lucia Sorba, Biswajit Karmakar
Institutions: Saha Institute of Nuclear Physics, Homi Bhabha National Institute, Purdue University West Lafayette, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, CEA Paris-Saclay - Etablissement de Saclay, Istituto Officina dei Materiali, Scuola Normale Superiore, Istituto Nanoscienze
Language: Latvian
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4414345172