The Interplay of Charge and Spin in Quantum Dots: The Ising Case
arXiv:1007.2436 · doi:10.1103/PhysRevB.84.075307
Abstract
The physics of quantum dots is succinctly depicted by the {\it Universal Hamiltonian}, where only zero mode interactions are included. In the case where the latter involve charging and isotropic spin-exchange terms, this would lead to a non-Abelian action. Here we address an Ising spin-exchange interaction, which leads to an Abelian action. The analysis of this simplified yet non-trivial model shed some light on a more general case of charge and spin entanglement. We present a calculation of the tunneling density of states and of the dynamic magnetic susceptibility. Our results are amenable to experimental study and may allow for an experimental determination of the exchange interaction strength.
11 pages, 7 figures
References in corpus (9)
- Coulomb effects in granular materials at not very low temperatures
- Functional Integral Bosonization for Impurity in Luttinger Liquid
- Effects of spin and exchange interaction on the Coulomb-blockade peak statistics in quantum dots
- Kondo effect and STM spectra through ferromagnetic nanoclusters
- Elementary Excitations of Ferromagnetic Metal Nanoparticles
- Tunnelling density of states at Coulomb blockade peaks
- The Interplay of Spin and Charge Channels in Zero Dimensional Systems
- Spin and Charge Correlations in Quantum Dots: An Exact Solution
- Linear conductance in Coulomb-blockade quantum dots in the presence of interactions and spin
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- Spin fluctuations in quantum dots
- Statistics of Spin Fluctuations in Quantum Dots with Ising Exchange
- U(1) and SU(2) quantum dissipative systems: The Caldeira-Leggett vs. the Amegaokar-Eckern-Schön approaches
- Co-tunneling current through the two-level quantum dot coupled to magnetic leads: A role of exchange interaction
- Tunneling density of states in quantum dots with anisotropic exchange