Naslov
Thermal conductivity of spin gap antiferromagnets

Autori
Smontara, Ana ; Bilušić, Ante ; Smiljanić, Igor ; Berger, H. ; Forro, L.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Joint European Japanese conference : Frustration in condensed Matter, Lyon, Francuska, 12.-15.05.2009. / - , 2009, 24-24

Skup
Joint European Japanese conference : Frustration in Condensed Matter

Mjesto i datum
Lyon, Francuska, 12.05.2009. - 15.05.2009

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
thermal conductivity; spin gap antiferomagnets

Sažetak
The thermal conductivity of spin-gap antiferomagnets (SG AFMs) is a tool that probes their spin excitations and spins-phonons interaction. A variety of phenomena are observed: for example, in various strontium-cuprates thermal conductivity strongly enhances due to the opening of the heat channel carried by either magnons or spinonsa. In spin-Peierls compounds the thermal conductivity exhibits rather unusual double peak features at low temperatures, explained as a ngerprint of the spin-phonon resonance scatteringb. The thermal conductivity of strongly frustrated systems also shows the existence of spin-phonon resonance at low temperatures. We present the study of the thermal transport of several SG AFMs: (i) of copper-tellurides, quasi-0D geomatrically frustrated compounds with S=1/2, (b) of a "zig-zag" frustrated spin ladder system LiCu2O2 (S=1/2), and (c) quasi-2D S=1 system nickel-telluride. We nd that the thermal conductivity of these systems exhibit features typical for spin-phonon resonance coupling, gradually decreasing as the dimensionality of the systems increase

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
The paper was presented at the "Joint European Japanese conference : Frustration in Condensed Matter" as a talk by Ana Smontara. This work was supported in part by the project of the European Science Foundation “Highly Frustrated Magnetism (HFM)”.

POVEZANOST RADA