Edge reconstruction of a compressible quantum Hall fluid in the filling fraction range 1/3 to 2/3
Year: 2024
Type: article
Abstract: Edge reconstruction of gate-tunable compressible quantum Hall fluids in the filling fraction range 1/3 to 2/3 is studied by measuring transmitted conductance of two individually excited fractional ${e}^{2}/3h$ edge modes of bulk 2/3 fractional quantum Hall fluid. Our findings reveal that the measured transmitted conductance deviates from the fully equilibrated value for the filling fraction range 1/3--2/3 of the gate-tunable compressible quantum Hall fluids at higher magnetic fields. This observation suggests that at the boundary of the compressible fluid, a reconstructed ${e}^{2}/3h$ fractional edge mode is present and the mode does not completely equilibrate with the inner dissipative bulk region. Consequently, this outer reconstructed edge mode supports adiabatic charge transport, allowing nonequilibrated current transport through the compressible region. These studies open new avenues for achieving robust fractional edge modes even in compressible quantum Hall fluids under strong magnetic fields, enhancing our understanding of edge state dynamics in these complex systems.
Authors: Suvankar Purkait, Tanmay Maiti, Pooja Agarwal, Suparna Sahoo, Sreejith G J, Sourin Das, 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, CEA Paris-Saclay, Indian Institute of Science Education and Research Pune, Indian Institute of Science Education and Research Kolkata, Istituto Officina dei Materiali, Scuola Normale Superiore, Istituto Nanoscienze
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4405706658