Intermediate Low Spin States in a Few-electron Quantum Dot in the $\nu \le 1$ Regime

Abstract

We study the effects of electron-electron interactions in a circular few-electron vertical quantum dot in such a strong magnetic field that the filling factor $\nu \le 1$. We measure excitation spectra and find ground state transitions beyond the maximum density droplet ($\nu =1$) region. We compare the observed spectra with those calculated by exact diagonalization to identify the ground state quantum numbers, and find that intermediate low-spin states occur between adjacent spin-polarized magic number states.

4 pages, 4 figures

References in corpus (9)

• Excitation Spectra of Circular Few-Electron Quantum Dots
• Quantum Dots in Strong Magnetic Fields: Stability Criteria for the Maximum Density Droplet
• Direct Coulomb and Exchange Interaction in Artificial Atoms
• The Collapse of the Spin-Singlet Phase in Quantum Dots
• Quantum dots in magnetic fields: Phase diagram and broken symmetry of the Chamon-Wen edge
• Origin of Magic Angular Momentum in a Quantum Dot under Strong Magnetic Field
• Composite Fermion Description of Correlated Electrons in Quantum Dots: Low Zeeman Energy Limit
• Spin configurations in circular and rectangular vertical quantum dots in a magnetic field: Three-dimensional self-consistent simulation
• Symmetry of `molecular' configurations of interacting electrons in a quantum dot in strong magnetic fields

Cited by in corpus (20)

• Symmetry breaking and quantum correlations in finite systems: Studies of quantum dots and ultracold Bose gases and related nuclear and chemical methods
• Effects of symmetry breaking in finite quantum systems
• Vortices in quantum droplets: Analogies between boson and fermion systems
• A molecular state of correlated electrons in a quantum dot
• AFM probe for the signatures of Wigner correlations in the conductance of a one-dimensional quantum dot
• Three-electron anisotropic quantum dots in variable magnetic fields: exact results for excitation spectra, spin structures, and entanglement
• Wigner molecules in carbon-nanotube quantum dots
• Spin projected unrestricted Hartree-Fock ground states for harmonic quantum dots
• Finite-thickness effects in ground-state transitions of two-electron quantum dots
• Dynamical screening of the Coulomb interaction for two confined electrons in a magnetic field
• Fractionalization into merons in quantum dots
• Effects of thickness in quantum dots at strong magnetic fields
• Meron ground states of quantum Hall droplets
• Fractional quantum Hall physics and higher-order momentum correlations in a few spinful fermionic contact-interacting ultracold atoms in rotating traps
• Few-body collective excitations beyond Kohn's theorem in quantum Hall systems
• Interaction and temperature effects on the pair correlation function of a strongly interacting 1D quantum dot
• Chiral Spin Textures of Strongly Interacting Particles in Quantum Dots
• Hyperspherical Slater determinant approach to few-body fractional quantum Hall states
• Coexistence of parallel and series current paths in parallel-coupled double quantum dots in nonlinear transport regime
• Artificial versus Natural Atoms: The uncanny capability of the many-body Schrödinger equation to produce emergent behavior