Naslov
Effect of the coulomb interaction on the Peierls gap

Autori
Barišić, Slaven ; Tutiš, Eduard

Izvornik
Journal of Physics C. Solid State Physics (0953-8984) 19 (1986), 32; 6303-6310

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

Ključne riječi
Peiels instability; long-range; Coulomb interaction; gap

Sažetak
The system of conducting electrons which interact through the long-range Coulomb force which in addition are coupled to the 2kF deformed lattice is considered within the generalised Tomonaga model for spinless fermions. The T=0 gap DeltaL in the electron spectrum is evaluated using the self-consistent harmonic approximation for the excitation spectrum of the bosonised Hamiltonian. The resulting plasmons characterised by the maximum frequency omega0, acquire the gap DeltaL at T=0. The screening picture which is metallic for TgesTLMF becomes semiconducting at T=0. However, to the leading order in DeltaL/omega0 both TLMF and DeltaL are given by the expressions involving only the short-range part of Coulomb forces, i.e. the law of corresponding states DeltaLsimeTLMF of the short-range theory is recovered

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA