Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session Q65: Quantum Hall Effect: Transport Phenomena
3:00 PM–5:48 PM,
Wednesday, March 16, 2022
Room: Hyatt Regency Hotel -Grant Park C
Sponsoring
Unit:
DCMP
Chair: Frederic Joucken, Arizona State University
Abstract: Q65.00010 : A new paradigm of universal Fano factor on and off conductance plateaus in quantum Hall systems: experiment and theory*
4:48 PM–5:00 PM
Presenter:
Ankur Das
(Weizmann Institute of Science)
Authors:
Sourav Biswas
(Weizmann Institute of Science)
Rajarshi Bhattacharyya
(University of California, San Diego)
Hemanta Kumar Kundu
(Weizmann Institute of Science)
Ankur Das
(Weizmann Institute of Science)
Moty Heiblum
(Weizmann Institute of Science)
Vladimir Umansky
(Weizmann Institute of Science)
Moshe Goldstein
(Tel Aviv University)
Yuval Gefen
(Weizmann Institute of Science)
To account for these observations we present a new theoretical paradigm of shot noise that relies on the ubiquitous presence of counter-propagating neutral edge modes (``neutralons") at the edge. These neutrals may be of either a topological (hole-like filling fractions) or edge reconstruction (particle-like or integer filling fractions) origin. We show that even on an intermediate transmission plateau within the QPC shot noise can be generated via creating and then annihilating neutralons, leading to a Fano factor which is equal to the bulk filling fraction. This Fano factor remains robust even off the conductance plateau.
*YG supported by CRC 183 (project C01), the Minerva Foundation, DFG grant No. RO 2247/11-1, MI 658/10-2, GIF I-118-303.1-2018MG supported by ISF and DDR&D 3427/21MH supported by ERC under European Community’s Seventh Framework Program (FP7/2007-2013)/ERC grant agreement number 713351, the Minerva Foundation, Federal German Ministry for Education and Research, under grant number 713534AD supported by German-Israeli Foundation Grant No. I-1505-303.10/2019, Israel PBC, Weizmann Institute of Science Dean of Faculty fellowship
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