Naslov
New SDW phases in quasi one-dimensional systems dimerized in the transverse direction

Autori
Zanchi, D ; Bjeliš, A

Izvornik
Europhysics Letters (EPL) (0295-5075) 56 (2001), 4; 596-602

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
SPIN-DENSITY-WAVE ; HIGH MAGNETIC-FIELDS ; (TMTSF)(2)CLO4 ; METAL ; TRANSITIONS ; ELECTRONS ; DIAGRAM

Sažetak
The spin density wave instabilities in the quasi one-dimensional metal (TMTSF)(2)ClO4 are studied in the framework of a matrix random phase approximation for intraband and interband order parameters. Depending on the anion ordering potential V which measures the lattice doubling in the transverse direction, two different instabilities are possible. The SDW0 state at low values of V is antiferromagnetic in the b direction and has a critical temperature that decreases rapidly with V. The degenerated states SDW+/-, stable at higher values of V, are superpositions of two magnetic orders, each one on its sub-family of chains. As V increases, the ratio between the two components of SDW+/- tends to zero and the critical temperature increases asymptotically towards that of SDW instability for a system having perfect nesting and no anion order. At intermediate V, i.e. between the phases SDW0 and SDW+/-, the metallic state can persist down to T = 0.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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