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Title: Spin-pseudospin intertwined excitation at the ν = 1 bilayer quantum Hall state investigated by nuclear-spin relaxation

We investigate the electron spin degree of freedom at the imbalanced density bilayer ν = 1 quantum Hall states using the resistively detected nuclear-spin-lattice relaxation rate 1/T{sub 1}. Our measurements reveal a continuous change in 1/T{sub 1} for σ = 1 to 0, suggesting that the balanced density ν = 1 state also exhibits electron-spin fluctuations. Moreover, the value of 1/T{sub 1} in the back layer (the layer from which electrons are transferred to the front layer) increases at intermediate density imbalance states. This indicates that the low-energy electron-spin mode, similar to a mode observed in Skyrmion crystals, might extend across the two layers.
Authors:
;  [1] ; ;  [2] ; ; ;  [3] ;  [4]
  1. Graduate School of Science, Kyoto University, Kyoto 606-8502 (Japan)
  2. Department of Physics, Hyogo College of Medicine, Nishinomiya 663-8501 (Japan)
  3. Research Center for Low Temperatures and Materials Sciences, Kyoto University, Kyoto 606-8501 (Japan)
  4. Advanced Meson Science Laboratory, Riken, Wako 980-8578 (Japan)
Publication Date:
OSTI Identifier:
22261815
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1566; Journal Issue: 1; Conference: ICPS 2012: 31. international conference on the physics of semiconductors, Zurich (Switzerland), 29 Jul - 3 Aug 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DEGREES OF FREEDOM; DENSITY; ELECTRONS; FLUCTUATIONS; LAYERS; SPIN; SPIN-LATTICE RELAXATION