Naslov
Coexistence of superconductivity and spin density wave orderings in Bechgaard and Fabre salts

Autori
Pasquier, Claude ; Auban-Senzier, Pascale ; Vuletić, Tomislav ; Tomić, Silvia ; Héritier, Michel ; Jérome, Denis

Izvornik
Journal de Physique IV (1155-4339) 12 (2002), PR9; 197-200

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, kongresno priopcenje, znanstveni

Ključne riječi
organic superconductivity; spin density wave

Sažetak
In a small range of pressure, superconductivity (SC) and Spin Density Wave (SDW) states are shown to coexist in the Bechgaard salt (TMTSF)2PF6 and the Fabre salt (TMTTF)2BF4. In (TMTSF)2PF6, a precise investigation of the (P, T) phase diagram has led us to demonstrate the coexistence of the two phases with a superconducting critical temperature which is pressure independent while the critical current at zero field is strongly depressed as the pressure is decreased. In (TMTTF)*BF4, using non-linear transport measurements, we present the signature of the presence of 1D superconducting filaments in a small range of pressure. We also investigate the compound under a magnetic field applied along the c*-axis : the upper critical field is more or less pressure independent and is about 2 Tesla (at zero temperature). We suggest that such a high critical field is compatible with the penetration of the magnetic field in the insulating regions of the compound in a similar way of Josephson vortices in layered superconductors.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA