Naslov
Heat transport in quantum spin system Cu2Te2O5Cl2-xBrx

Autori
Bilušić, Ante

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni

Skup
Workshop of the CRO-HU bilateral cooperation "Complex Systems of Strongly correlated Electrons"

Mjesto i datum
Zagreb, Hrvatska, 05.09.2005. - 06.09.2005

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
spin frustration; magnetic ordering; thermal conductivity

Sažetak
Insulating copper-tellurides (of the general formula Cu2Te205(Cl2_xBrx)) belong to the class of geometrically frustrated systems due to the tetrahedral arrangement of Cu2+ ions. Between 11.4 K and 18.2 K (depending on the Br content) coppertellurides exhibit a magnetic phase transition with the formation of the long-range spin-ordered state. We present the thermal conductivity data of copper-tellurides. For temperatures higher than the transition temperature, a resonant magneto-elastic coupling takes part in the phonon scattering. At the transition temperatures thermal conductivity increases for an order of magnitude, indicating that spin long-range ordered state switches off the phonon resonance scattering in the spin subsystem.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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