Driving XXZ spin chains: Magnetic-field and boundary effects

Abstract

Using the time-evolving block decimation, we study the spin transport through spin-1/2 and spin-1 XXZ chains subjected to an external magnetic field and contacted to noninteracting fermionic leads. For generic system-lead couplings, the spin conductance exhibits several resonances as a function of the magnetic-field strength. In the spin-1/2 but not the spin-1 case, the coupling to the leads can be fine-tuned to reach a conducting fixed point, where the peak structure is washed out and the spin conductance is large throughout the gapless Luttinger-liquid phase. For the Haldane phase of the spin-1 chain, we analyse how the spin transport is affected by spin-1/2 edge states, and argue that two-impurity Kondo physics is realised.

arXiv comment7 pages, 8 figures, revised version

References in corpus (27)

• Antiferromagnetic spintronics
• Efficient classical simulation of slightly entangled quantum computations
• Time-dependent transport in interacting and non-interacting mesoscopic systems
• The numerical renormalization group method for quantum impurity systems
• Matrix Product Density Operators: Simulation of finite-T and dissipative systems
• Transport and conservation laws
• Simulating Strongly Correlated Quantum Systems with Tree Tensor Networks
• Conformal Field Theory Approach to the 2-Impurity Kondo Problem: Comparison with Numerical Renormalization Group Results
• Matrix product simulations of non-equilibrium steady states of quantum spin chains
• On steady-state currents through nano-devices: a scattering-states numerical renormalization group approach to open quantum systems
• Equal Time Correlations in Haldane Gap Antiferromagnets
• DMRG evaluation of the Kubo formula -- Conductance of strongly interacting quantum systems
• An order parameter for impurity systems at quantum criticality
• Impurities in $s=1$ Heisenberg Antiferromagnets
• Haldane-Gapped Spin Chains as Luttinger Liquids: Correlation Functions at Finite Field
• Universality and scaling in a charge two-channel Kondo device
• Two-channel Kondo physics in odd impurity chains
• Exact asymptotics of the current in boundary dissipated quantum chains in large external fields
• Matrix product state approach for a two-lead, multi-level Anderson impurity model
• Two-channel Kondo physics in tunnel-coupled double quantum dots
• Transport and scattering in inhomogeneous quantum wires
• Effective S=1/2 description of the S=1 chain with strong easy plane anisotropy
• Spin transport through a spin-1/2 XXZ chain contacted to fermionic leads
• Conducting fixed points for inhomogeneous quantum wires: a conformally invariant boundary theory
• Conductance in inhomogeneous quantum wires: Luttinger liquid predictions and quantum Monte Carlo results
• Density matrix renormalization group study in energy space for a single-impurity Anderson model and an impurity quantum phase transition
• Coulomb blockade without potential barriers

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