Evidence for Skyrmion crystallization from NMR relaxation experiments

Abstract

A resistively detected NMR technique was used to probe the two-dimensional electron gas in a GaAs/AlGaAs quantum well. The spin-lattice relaxation rate $(1/T_1)$ was extracted at near complete filling of the first Landau level by electrons. The nuclear spin of ${}^{75}$As is found to relax much more efficiently with $T\to 0$ and when a well developed quantum Hall state with $R_{xx}\simeq 0$ occurs. The data show a remarkable correlation between the nuclear spin relaxation and localization. This suggests that the magnetic ground state near complete filling of the first Landau level may contain a lattice of topological spin texture, i.e. a Skyrmion crystal.

References in corpus (15)

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• Skyrme Crystal In A Two-Dimensional Electron Gas
• Electrically-Controlled Nuclear Spin Polarization and Relaxation by Quantum-Hall states
• A New Type of Electron Nuclear-Spin Interaction from Resistively Detected NMR in the Fractional Quantum Hall Effect Regime
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• Giant Low Temperature Heat Capacity of GaAs Quantum Wells near Landau Level Filling $\nu$=1
• Hartree-Fock Theory of Skyrmions in Quantum Hall Ferromagnets
• Microwave Resonance of 2D Wigner Crystal around integer Landau fillings
• Critical Behavior of Nuclear-Spin Diffusion in GaAs/AlGaAs Heterostructures near Landau Level Filling ν=1
• Skymrion lattice melting in the quantum Hall system
• Spectroscopic Evidence for the Localization of Skyrmions near Nu=1 as T->0
• Quantum Critical Dynamics of the Skyrmion Lattice
• The absorption spectrum around nu=1: evidence for a small size Skyrmion
• Skyrmion Dynamics and NMR Line Shapes in QHE Ferromagnets
• Skyrme crystal or Skyrme liquid?

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• Formation of magnetic skyrmions with tunable properties in PdFe bilayer deposited on Ir(111)
• Spontaneous Symmetry Breaking and Quantum Hall Effect in Graphene
• Sharp Tunneling Resonance from the Vibrations of an Electronic Wigner Crystal
• Skyrmion solids in monolayer graphene
• Fractional spin textures in the frustrated magnet SrCr${}_{9p}$Ga${}_{12-9p}$O${}_{19}$
• Soft Spin Wave Near nu=1: Evidence for a Magnetic Instability in Skyrmion Systems
• Resistively-Detected NMR in a Two-Dimensional Electron System near $\nu =1$: Clues to the Origin of the Dispersive Lineshape
• Skyrmion zoo in graphene at charge neutrality in a strong magnetic field
• Pinning mode resonance of a Skyrme crystal near Landau level filling factor $\nu$=1
• Wigner solids of domain wall skyrmions
• NMR Probing Spin Excitations in the Ring-Like Structure of a Two-Subband System
• Melting of hexagonal Skyrmion states in chiral magnets
• Current-induced nuclear-spin activation in a two-dimensional electron gas
• Anisotropic Quantum Spin Hall Effect, Spin-Orbital Textures and Mott Transition
• Landauer-Büttiker approach for hyperfine mediated electronic transport in the integer quantum Hall regime
• Density Waves Instability and a Skyrmion Lattice on the Surface of Strong Topological Insulators
• Probing Quantum Hall Pseudospin Ferromagnet by Resistively Detected NMR
• Quantum Hall Skyrmions at $\nu =0,\pm 1$ in monolayer graphene
• Magnetotransport patterns of collective localization near $\nu =1$ in a high-mobility two-dimensional electron gas
• Riemann meets Goldstone: magnon scattering off quantum Hall skyrmion crystals probes interplay of symmetry breaking and topology
• Magnetic Skyrmion Lattice by Fourier Transform Method
• Resistively Detected NMR in Quantum Hall States: Investigation of the anomalous lineshape near $\nu =1$
• RD-NMR spectra of the crystal states of the two-dimensional electron gas in a quantizing magnetic field
• Chiral spin currents and spectroscopically accessible single merons in quantum dots
• Hamiltonian Theory of Disorder at 1/3
• Large and exact quantum degeneracy in a Skyrmion magnet
• Disorder Enhanced Nuclear Spin Relaxation at Landau Level Filling Factor One
• Thermal Activation Signatures of the Anderson Insulator and the Wigner Solid forming near $\nu =1$
• Incipient singlet-triplet states in a hybrid mesoscopic system
• Chiral Spin Textures of Strongly Interacting Particles in Quantum Dots
• Network architecture of energy landscapes in mesoscopic quantum systems
• Phase diagram of two dimensional electron gas in a perpendicular magnetic field around Landau level filling factors ν=1 and ν=3