Magnetic field induced lattice effects in a quasi-two-dimensional organic conductor close to the Mott metal-insulator transition

Autor(es)

de Souza, Mariano ; Bruehl, Andreas ; Strack, Christian ; Schweitzer, Dieter ; Lang, Michael

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW B; v. 86, n. 8, p. 5-pg., 2012-08-21.

Resumo

We present ultra-high-resolution dilatometric studies in magnetic fields on a quasi-two-dimensional organic conductor kappa-(D8-BEDT-TTF)(2)Cu[N(CN)(2)]Br, which is located close to the Mott metal-insulator (MI) transition. The obtained thermal expansion coefficient, alpha(T), reveals two remarkable features: (i) the Mott MI transition temperature T-MI = (13.6 +/- 0.6) K is insensitive to fields up to 10 T, the highest applied field; (ii) for fields along the interlayer b axis, a magnetic field induced (FI) phase transition at T-FI = (9.5 +/- 0.5) K is observed above a threshold field H-c similar to 1 T, indicative of a spin reorientation with strong magnetoelastic coupling. (AU)

• Processo FAPESP: 11/22050-4 - Investigação das propriedades termodinâmicas e de transporte de sistemas eletrônicos fortemente correlacionados
• Beneficiário: Valdeci Pereira Mariano de Souza
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 12/02747-3 - The 19th International Conference on Magnetism with Strongly Correlated Electron Systems (SCES)
• Beneficiário: Valdeci Pereira Mariano de Souza
• Modalidade de apoio: Auxílio à Pesquisa - Reunião - Exterior