Symmetrized Mean-Field Description of Magnetic Instabilities in -(Bedt-Ttf)Cu[N(Cn)]Y Salts

Science Direct Working Paper No S1574-0331(04)70391-4

9 Pages Posted: 1 Jun 2017 Last revised: 16 Dec 2017

See all articles by A. Painelli

A. Painelli

University of Parma - General Inorganic Chemistry Department, Analytical and Physical Chemistry

Alberto Girlando

University of Parma - General Inorganic Chemistry Department, Analytical and Physical Chemistry

A. Fortunelli

National Research Council (CNR) - Istituto di Chimica Quantistica ed Energetica Molecolare

Date Written: November 2000

Abstract

We present a novel and convenient mean-field method, and apply it to study the metallic/antiferromagnetic interface of -(BEDT-TTF)Cu[N(CN)]Y organic superconductors (BEDT-TTF is bis-ethylendithio-tetrathiafulvalene, Y=Cl,Br). The method, which fully exploits the crystal symmetry, allows one to obtain the mean-field solution of the two-dimensional Hubbard model for very large lattices (tipically 6 × 10 sites), yielding a reliable description of the phase boundary in a wide region of the parameter space. The metal/antiferromagnet transition appears to be second order, except for a narrow region of the parameter space, where the transition is very sharp and possibly first order. The coexistence of metallic and antiferromagnetic properties is only observed for the transient state in the case of smooth second order transitions. The relevance of the present results to the complex experimental behavior of centrosymmetric -(BEDT-TTF)Cu[N(CN)]Y salts is discussed.

Keywords: 74.70.Kn

Suggested Citation

Painelli, A. and Girlando, Alberto and Fortunelli, A., Symmetrized Mean-Field Description of Magnetic Instabilities in -(Bedt-Ttf)Cu[N(Cn)]Y Salts (November 2000). Science Direct Working Paper No S1574-0331(04)70391-4, Available at SSRN: https://ssrn.com/abstract=2969414

A. Painelli

University of Parma - General Inorganic Chemistry Department, Analytical and Physical Chemistry

Parma
Italy

Alberto Girlando (Contact Author)

University of Parma - General Inorganic Chemistry Department, Analytical and Physical Chemistry ( email )

Parma
Italy

A. Fortunelli

National Research Council (CNR) - Istituto di Chimica Quantistica ed Energetica Molecolare

V. Alfieri 1
Ghezzano, I-56010
Italy

Do you have a job opening that you would like to promote on SSRN?

Paper statistics

Downloads
2
Abstract Views
79
PlumX Metrics