Spontaneous Spin Polarization in Quantum Wires

Abstract

A number of recent experiments report spin polarization in quantum wires in the absence of magnetic fields. These observations are in apparent contradiction with the Lieb-Mattis theorem, which forbids spontaneous spin polarization in one dimension. We show that sufficiently strong interactions between electrons induce deviations from the strictly one-dimensional geometry and indeed give rise to a ferromagnetic ground state in a certain range of electron densities.

4 pages, 4 figures

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Cited by in corpus (27)

• Symmetry breaking and quantum correlations in finite systems: Studies of quantum dots and ultracold Bose gases and related nuclear and chemical methods
• Spontaneous spin polarization in quantum point contacts
• Wigner crystal physics in quantum wires
• What lurks below the last plateau: Experimental studies of the 0.7 x 2e^2/h conductance anomaly in one-dimensional systems
• Transition from a one-dimensional to a quasi-one-dimensional state in interacting quantum wires
• Effects of short-range interactions on transport through quantum point contacts: A numerical approach
• Incipient Wigner Localization in Circular Quantum Dots
• Spin coupling in zigzag Wigner crystals
• Three-electron anisotropic quantum dots in variable magnetic fields: exact results for excitation spectra, spin structures, and entanglement
• Energy-level pinning and the 0.7 spin state in one dimension: GaAs quantum wires studied using finite-bias spectroscopy
• Imaging the zigzag Wigner crystal in confinement-tunable quantum wires
• Non-Kondo zero-bias anomaly in quantum wires
• The influence of device geometry on many-body effects in quantum point contacts: Signatures of the 0.7 anomaly, exchange and Kondo
• Spin-charge separation in a strongly correlated spin-polarized chain
• Self-Organised Fractional Quantisation in a Hole Quantum Wire
• Compressibility measurements of quasi-one-dimensional quantum wires
• Quantum phase transition in quantum wires controlled by an external gate
• Interference as a Probe of Spin Incoherence in Strongly Interacting Quantum Wires
• Magnetic Phase Diagram of Spin-1/2 Two-Leg Ladder with Four-Spin Ring Exchange
• Formation of defects in multirow Wigner crystals
• Structural transitions of nearly second order in classical dipolar gases
• Neutron stars with spin polarized self-interacting dark matter
• Scattering of charge and spin excitations and equilibration of a one-dimensional Wigner crystal
• Nuclear magnetic resonance probes for the Kondo scenario for the 0.7 feature in semiconductor quantum point contact devices
• Large Zeeman Splitting in Out-of-Plane Magnetic Field in a Double-Layer Quantum Point Contact
• Persistence of the 0.7 anomaly of quantum point contacts in high magnetic fields
• Novel Differential Conductance Oscillations in Asymmetric Quantum Point Contacts