Metal-charge density wave coexistence in TTF[Ni(dmit)2]2

Wafa Kaddour (1, 2) , Pascale Auban-Senzier (1) , Hélène Raffy (1) , Miguel C. Monteverde (1) , Jean-Paul Pouget (1) , Claude R. Pasquier (1) , Pere Alemany (3) , Enric Canadell (4) , Lydie Valade (5)

1 LPS - Laboratoire de Physique des Solides
2 University of Tunis El Manar
3 IQTCUB - Departament de Quimica Fisica and Institut de Quimica Teorica i Computacional
4 ICMAB - Institut de Ciència de Materials de Barcelona
5 LCC - Laboratoire de chimie de coordination

We have established a new pressure–temperature phase diagram of TTF[Ni(dmit)2]2 based on longitudinal and transverse resistivity measurements under pressure up to 30 kbar. We were able to identify three different charge density wave (CDW) states which all coexist with a metallic state in a wide temperature range and superconductivity at the lowest temperatures. At low pressure, two successive CDW transitions have been clearly identified. These two transitions merge into a single one at 12 kbar. A maximum of this unique CDW transition temperature is observed at 19 kbar.

Domaines: Chimie de coordination

Wafa Kaddour, Pascale Auban-Senzier, Hélène Raffy, Miguel C. Monteverde, Jean-Paul Pouget, et al.. Metal-charge density wave coexistence in TTF[Ni(dmit)2]2. Physica B: Condensed Matter, 2015, 460, pp.147-150. ⟨10.1016/j.physb.2014.11.058⟩. ⟨hal-01909682⟩