Possible evidence of a spontaneous spin-polarization in mesoscopic 2D electron systems

Abstract

We have experimentally studied the non-equilibrium transport in low-density clean 2D electron systems at mesoscopic length scales. At zero magnetic field (B), a double-peak structure in the non-linear conductance was observed close to the Fermi energy in the localized regime. From the behavior of these peaks at non-zero B, we could associate them to the opposite spin states of the system, indicating a spontaneous spin polarization at B = 0. Detailed temperature and disorder dependence of the structure shows that such a splitting is a ground state property of the low-density 2D systems.

arXiv comment7 pages, 5 figures

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• Strongly correlated two-dimensional plasma explored from entropy measurements
• Spin-Droplet State of an Interacting 2D Electron System
• Quantum ring with the Rashba spin-orbit interaction in the regime of strong light-matter coupling
• Phase and amplitude response of "0.7 feature" caused by holes in silicon one-dimensional wires and rings
• Interplay of h/e and h/2e Oscillations in Gate-Controlled Aharonov-Bohm Rings
• Magnetotransport in disordered delta-doped heterostructures
• Highly enhanced thermopower in two-dimensional electron systems at milliKelvin temperatures
• Novel Energy Scale in the Interacting 2D Electron System Evidenced from Transport and Thermodynamic Measurements
• Interaction-induced enhancement of $g$-factor in graphene
• Hartree-Fock ground state of the two-dimensional electron gas with Rashba spin-orbit interaction
• A generalized Stoner criterion and versatile spin ordering in two-dimensional spin-orbit coupled electron systems
• Signatures of an Anomalous Nernst Effect in a Mesoscopic Two-Dimensional Electron System
• Zero-bias anomaly and Kondo-assisted quasi-ballistic 2D transport
• Magnetic field induced Coulomb blockade in small disordered delta-doped heterostructures
• Quantum Monte Carlo study of the phase diagram of the two-dimensional uniform electron liquid
• Spin polarization in modulation-doped GaAs quantum wires
• Evidence of breakdown of the spin symmetry in diluted 2D electron gases
• Spontaneous spin polarization in doped semiconductor quantum wells
• Finite-thickness effect and spin polarization of the even-denominator fractional quantum Hall states
• Phase diagram of the interacting persistent spin-helix state
• Theory of spin polarization in mesoscopic spin-orbit coupling systems
• Magnetic-field-driven redistribution between extended and localized electronic states in high-mobility Si MOSFETs at low temperatures
• Field-tunable magnetic phases in a semiconductor-based two-dimensional Kondo lattice
• Sensitivity of the magnetic state of a spin lattice on itinerant electron orbital phase