Spin Degree of Freedom in the nu =1 Bilayer Electron System Investigated via Nuclear Spin Relaxation

Abstract

The nuclear-spin-relaxation rate 1/T_1 has been measured in a bilayer electron system at and around total Landau level filling factor nu =1. The measured 1/T_1, which probes electron spin fluctuations, is found to increase gradually from the quantum Hall (QH) state at low fields through a phase transition to the compressible state at high fields. Furthermore, 1/T_1 in the QH state shows a small but noticeable increase away from nu =1. These results demonstrate that, as opposed to common assumption, the electron spin degree of freedom is completely frozen neither in the QH nor compressible states.

arXiv comment5pages, 4 figures

References in corpus (13)

• Observation of a Linearly Dispersing Collective Mode in a Quantum Hall Ferromagnet
• Electrically-Controlled Nuclear Spin Polarization and Relaxation by Quantum-Hall states
• Collective Excitations, NMR, and Phase Transitions in Skyrme Crystals
• Strong Correlation to Weak Correlation Phase Transition in Bilayer Quantum Hall Systems
• NMR Determination of 2D Electron Spin Polarization at $\nu =1/2$
• Phase Diagram for Quantum Hall Bilayers at $\nu =1$
• Coexistence of Composite-Bosons and Composite-Fermions in nu=1/2 + 1/2 Quantum Hall Bilayers
• Strong enhancement of drag and dissipation at the weak- to strong- coupling phase transition in a bi-layer system at a total Landau level filling nu=1
• Optically Pumped NMR Studies of Electron Spin Polarization and Dynamics: New Constraints on the Composite Fermion Description of nu = 1/2
• Lattice Pseudospin Model for $\nu =1$ Quantum Hall Bilayers
• Evolution of $nu=1$ Bilayer Quantum Hall Ferromagnet
• SU(4) Skyrmions and Activation Energy Anomaly in Bilayer Quantum Hall Systems
• Quasiparticles in the 111 state and its compressible ancestors

Cited by in corpus (31)

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• Evidence for a finite temperature phase transition in a bilayer quantum Hall system
• NMR Evidence for Spin Canting in a Bilayer nu = 2 Quantum Hall System
• Charge Imbalance and Bilayer 2D Electron Systems at ${\nu }_T=1$
• Entanglement Skyrmions in multicomponent quantum Hall systems
• Quantum Hall Exciton Condensation at Full Spin Polarization
• Nuclear magnetic resonance and nuclear spin relaxation in AlAs quantum well probed by ESR
• Precursors to Exciton Condensation in Quantum Hall Bilayers
• Quantum Hall ferromagnetism in graphene: a SU(4) bosonization approach
• Intrinsic gap and exciton condensation in the nu_T=1 bilayer system
• Collective modes of CP(3) Skyrmion crystals in quantum Hall ferromagnets
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• Gauge Fluctuations and Interlayer Coherence in Bilayer Composite Fermion Metals
• Finite-momentum condensate of magnetic excitons in a bilayer quantum Hall system
• Current Induced Nuclear Spin Depolarization at Landau Level Filling Factor nu=1/2
• Probing Quantum Hall Pseudospin Ferromagnet by Resistively Detected NMR
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• Clausius-Clapeyron Relations For First Order Phase Transitions In Bilayer Quantum Hall Systems
• Metamorphosis of a Quantum Hall Bilayer State into a Composite Fermion Metal
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• Effect of magnetization on the tunneling anomaly in compressible quantum Hall states
• Semiclassical theory of the tunneling anomaly in partially spin-polarized compressible quantum Hall states
• Trial wavefunctions for the Goldstone mode in ν=1/2+1/2 quantum Hall bilayers
• Stability of the Excitonic Phase in Bilayer Quantum Hall Systems at Total Filling One -- Effects of Finite Well Width and Pseudopotentials --
• Electron spin polarization by isospin ordering in correlated two-layer quantum Hall systems
• Large Zeeman Splitting in Out-of-Plane Magnetic Field in a Double-Layer Quantum Point Contact
• Evidence of inter-layer interaction in magneto-luminescence spectra of electron bilayers
• Evidence of a first-order quantum phase transition of excitons in electron double layers