Abstract
We examined the electron spin degree of freedom around the total Landau-level filling factor ν = 1 in a bilayer system via nuclear spins. In a balanced bilayer system, nuclear-spin-lattice relaxation rate 1 / T1, which probes low-energy electron spin fluctuations, increases gradually as the system is driven from the quantum Hall (QH) state through a phase transition to the compressible state. This result demonstrates that the electron spin degree of freedom is not frozen either in the QH or compressible states. Furthermore, as the density difference between the two layers is increased from balanced bilayer to monolayer configurations, 1 / T1 around ν = 1 shows a rapid yet smooth increase. This suggests that pseudospin textures around the bilayer ν = 1 system evolves continuously into the spin texture for the monolayer system.
Original language | English |
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Pages (from-to) | 164-167 |
Number of pages | 4 |
Journal | Physica E: Low-Dimensional Systems and Nanostructures |
Volume | 34 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 2006 Aug 1 |
Externally published | Yes |
Keywords
- Nuclear spin
- Phase transition
- Quantum Hall effect
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics