Dimensional crossover and deconfinement in Bechgaard salts

Abstract

The Bechgaard salts are made of weakly coupled one dimensional chains. This particular structure gives the possibility to observe in these systems a dimensional crossover between a high temperature (or high energy) one dimensional phase and a two or three dimensional system. Since the filling of the chains is commensurate the system thus undergoes a deconfinement transition from a one dimensional Mott insulator to a two (or three) dimensional metal. Such a transition has of course a strong impact on the physical properties of these compounds, and is directly seen in transport measurements. In order to describe such a transition a dynamical mean field method has been introduced (chain-DMFT). Using this method we investigate a system of coupled Hubbard chains and show that we can indeed reproduce the deconfinement transition. This allows to determine physical quantities such as the transport transverse to the chains and the shape of the Fermi surface and quasiparticle residues in the low temperature phase.

Proccedings of the ISCOM 2003 conference, Port-Bourgenay, Sept 2003; To be published in the Journal de Physique IV

Cited by in corpus (8)

• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• Breakup of the Fermi surface near the Mott transition in low-dimensional systems
• Multiple charge density wave transitions in Lu_{2} Ir_{3} Si_{5} single crystal
• Interchain-Frustration-Induced Metallic State in Quasi-One-Dimensional Mott Insulators
• Evidence for strongly coupled charge-density-wave ordering in three-dimensional RE5Ir4Si10 compounds by optical measurements
• Stoichiometry, structure, and transport in the quasi-one-dimensional metal, Li(0.9)Mo(6)O(17)
• Two-loop renormalization-group theory for the quasi-one-dimensional Hubbard model at half filling
• Anisotropy crossover in the frustrated Hubbard model on four-chain cylinders