Correlated electron states and transport in triangular arrays
arXiv:cond-mat/0111345 · doi:10.1103/PhysRevB.72.235331
Abstract
We study correlated electron states in frustrated geometry of a triangular lattice. The interplay of long range interactions and finite residual entropy of a classical system gives rise to unusual effects in equilibrium ordering as well as in transport. A novel correlated fluid phase is identified in a wide range of densities and temperatures above freezing into commensurate solid phases. The charge dynamics in the correlated phase is described in terms of a height field, its fluctuations, and topological defects. We demonstrate that the height field fluctuations give rise to a ``free'' charge flow and finite dc conductivity. We show that freezing into the solid phase, controlled by the long range interactions, manifests itself in singularities of transport properties.
19 pages, 10 figures
References in corpus (14)
- Quantum Phase Transitions and Vortex Dynamics in Superconducting Networks
- Transport properties of annealed CdSe nanocrystal solids
- Electronic transport in films of colloidal CdSe nanocrystals
- Possible realization of an ideal quantum computer in Josephson junction array
- Single-Electron Charging and Coulomb Interaction in InAs Self-Assembled Quantum Dot Arrays
- Topological order in the insulating Josephson junction array
- Kink pairs unbinding on domain walls and the sequence of phase transitions in fully frustrated XY models
- Zero-Temperature Phase Transitions of Antiferromagnetic Ising Model of General Spin on a Triangular Lattice
- Vortex ordering in fully-frustrated superconducting systems with dice lattice
- Critical behavior of two-dimensional cubic and MN models in the five-loop renormalization-group approximation
- Nature of phase transition(s) in striped phase of triangular-lattice Ising antiferromagnet
- Fluctuation induced vortex pattern and its disordering in the fully frustrated XY model on a dice lattice
- Finite-Temperature Transition into a Power-Law Spin Phase with an Extensive Zero-Point Entropy
- Effective Field Theory of the Zero-Temperature Triangular-Lattice Antiferromagnet: A Monte Carlo Study