Negative differential conductance induced by spin-charge separation

Abstract

Spin-charge states of correlated electrons in a one-dimensional quantum dot attached to interacting leads are studied in the non-linear transport regime. With non-symmetric tunnel barriers, regions of negative differential conductance induced by spin-charge separation are found. They are due to a correlation-induced trapping of higher-spin states without magnetic field, and associated with a strong increase in the fluctuations of the electron spin.

REVTEX, 4 pages including 3 figures; Accepted for publication on Physical Review Letters

References in corpus (10)

• Multi-wall carbon nanotubes as quantum dots
• Shell filling in closed single-wall carbon nanotube quantum dots
• The Collapse of the Spin-Singlet Phase in Quantum Dots
• Resonant tunneling of interacting electrons in a one-dimensional wire
• Transport of interacting electrons through a double barrier in quantum wires
• Non-equilibrium transport through a vertical quantum dot in the absence of spin-flip energy relaxation
• Finite-size effects in tunneling between parallel quantum wires
• Interference and zero-bias anomaly in tunneling between Luttinger-liquid wires
• Control of spin in quantum dots with non-Fermi liquid correlations
• Non-equilibrium Plasmons in a Quantum Wire Single Electron Transistor

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• Transport properties of quantum dots in the Wigner molecule regime
• Asymmetric Franck-Condon factors in suspended carbon nanotube quantum dots
• Generating and controlling spin-polarized currents induced by a quantum spin Hall antidot
• Single quasiparticle and electron nano-emitter in the fractional quantum Hall regime
• Linear and nonlinear transport across carbon nanotube quantum dots
• Coherent properties of nano-electromechanical systems
• Spin projected unrestricted Hartree-Fock ground states for harmonic quantum dots
• An electrical probe for mechanical vibrations in suspended carbon nanotubes
• Spectral noise for edge states at filling factor $\nu =5/2$
• Temperature-induced emergence of Wigner correlations in a STM-probed one-dimensional quantum dot
• Non-Fermi liquid behavior in transport across carbon nanotube quantum dots
• Phonon distributions of a single bath mode coupled to a quantum dot
• Coupling symmetry of quantum dot states
• Non-linear Coulomb blockade microscopy of a correlated one-dimensional quantum dot
• Negative differential conductance in quantum dots in theory and experiment
• Spin-charge separation in an Aharonov-Bohm interferometer
• Dark channels in resonant tunneling transport through artificial atoms
• Finite frequency noise for edge states at filling factor $\nu =2/5$
• Non-equilibrium boundary driven quantum systems: models, methods and properties
• Interference and shot noise in a degenerate Anderson-Holstein model
• Nonequilibrium plasmons and transport properties of a double--junction quantum wire