Thermal transport properties of disordered spin-1/2 systems
arXiv:cond-mat/0603081 · doi:10.1016/j.physb.2006.01.548
Abstract
This work studies heat transport of bond-disordered spin-1/2 chains. As an example, the XX case is analyzed, which corresponds to a model of noninteracting spinless fermions. Within the fermion representation, the single-particle eigenenergies are determined numerically, which allow one to compute transport coefficients. Since the ballistic transport properties of a clean chain are destroyed by disorder, the focus is on the frequency dependence of the thermal conductivity and on a qualitative comparison with the spin conductivity, both at finite temperatures.
arXiv comment2 pages, 1 figure. To be published in the Proceedings of SCES '05, Vienna, in Physica B
References in corpus (13)
- Transport and conservation laws
- Magnon Heat Transport in (Sr,La)_14Cu_24O_41
- Zero-frequency transport properties of one dimensional spin-1/2 systems
- Thermal transport in a Luttinger liquid
- The thermal conductivity of the spin-1/2 XXZ chain at arbitrary temperature
- Thermal conductivity of anisotropic and frustrated spin-1/2 chains
- Dynamics and transport in random quantum systems governed by strong-randomness fixed points
- High temperature thermal conductivity of 2-leg spin-1/2 ladders
- Thermal transport of the XXZ chain in a magnetic field
- Non-dissipative thermal transport in the massive regimes of the XXZ chain
- Thermal conductivity of quasi-one-dimensional antiferromagnetic spin-chain materials
- Scaling of the spin stiffness in random spin-1/2 chains : Crossover from pure-metallic behaviour to random singlet-localized regime
- Thermal conductivity of one-dimensional spin-1/2 systems