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Title: Effect of Magnetization on the Tunneling Anomaly in Compressible Quantum Hall States

Journal Article · · Physical Review Letters
 [1];  [1];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Physics
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Tunneling of electrons into a two-dimensional electron system is known to exhibit an anomaly at low bias, in which the tunneling conductance vanishes due to a many-body interaction effect. Recent experiments have measured this anomaly between two copies of the half-filled Landau level as a function of in-plane magnetic field, and they suggest that increasing spin polarization drives a deeper suppression of tunneling. Here, we present a theory of the tunneling anomaly between two copies of the partially spin-polarized Halperin-Lee-Read state, and we show that the conventional description of the tunneling anomaly, based on the Coulomb self-energy of the injected charge packet, is inconsistent with the experimental observation. We propose that the experiment is operating in a different regime, not previously considered, in which the charge-spreading action is determined by the compressibility of the composite fermions.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Excitonics (CE); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-03ER46076; SC0001088
OSTI ID:
1541332
Alternate ID(s):
OSTI ID: 1457819
Journal Information:
Physical Review Letters, Vol. 120, Issue 26; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

References (31)

Composite-Fermion Spin Excitations as ν Approaches 1 / 2 : Interactions in the Fermi Sea journal July 2005
Equilibrium tunneling from the two-dimensional electron gas in GaAs: Evidence for a magnetic-field-induced energy gap journal February 1990
Optically Pumped NMR Studies of Electron Spin Polarization and Dynamics: New Constraints on the Composite Fermion Description of ν = 1 / 2 journal December 1999
Compressibility of the two-dimensional electron gas: Measurements of the zero-field exchange energy and fractional quantum Hall gap journal July 1994
Compact gauge fields and the infrared catastrophe journal October 1975
Semiclassical theory of the tunneling anomaly in partially spin-polarized compressible quantum Hall states journal May 2018
Spin and the Coulomb gap in the half-filled lowest Landau level journal September 2016
Vortices and Quasiparticles near the Superconductor-Insulator Transition in Thin Films journal August 2005
Tunneling into a two-dimensional electron system in a strong magnetic field journal August 1993
Spin Polarization of Composite Fermions: Measurements of the Fermi Energy journal May 1999
Semiclassical theory of the Coulomb anomaly journal August 1997
Spin Transition in the Half-Filled Landau Level journal February 2007
Coulomb barrier to tunneling between parallel two-dimensional electron systems journal December 1992
NMR Determination of 2D Electron Spin Polarization at ν = 1 / 2 journal January 2000
Topological excitations in compact Maxwell-Chern-Simons theory journal September 1993
Spin Degree of Freedom in the ν = 1 Bilayer Electron System Investigated by Nuclear Spin Relaxation journal March 2005
Spin-Dependent Phase Diagram of the ν T = 1 Bilayer Electron System journal March 2008
Quantum Hall Exciton Condensation at Full Spin Polarization journal January 2010
Tunnel transport and interlayer excitons in bilayer fractional quantum Hall systems journal May 2017
Theory of the half-filled Landau level journal March 1993
Nature of the Spin Transition in the Half-filled Landau Level journal January 2009
Particle-hole symmetry reveals failed superconductivity in the metallic phase of two-dimensional superconducting films journal September 2017
Fermi wave vector for the partially spin-polarized composite-fermion Fermi sea journal December 2017
Exciton Condensation in Bilayer Quantum Hall Systems journal March 2014
Bose–Einstein condensation of excitons in bilayer electron systems journal December 2004
Composite-fermion approach for the fractional quantum Hall effect journal July 1989
Tunneling between two-dimensional electron gases in a strong magnetic field journal November 1994
Current-induced nuclear spin depolarization at Landau level filling factor ν = 1/2 journal September 2012
Instantons and the spectral function of electrons in the half-filled Landau level journal September 1994
Compressible phase of a double-layer electron system with total Landau-level filling factor 1/2 journal October 1993
Spin Transition in Strongly Correlated Bilayer Two-Dimensional Electron Systems journal February 2005

Cited By (2)

Precursors to Exciton Condensation in Quantum Hall Bilayers journal August 2019
Precursors to Exciton Condensation in Quantum Hall Bilayers text January 2019

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