2003/02/27 by A. V. Sologubenko, H. R. Ott, G. Dhalenne +1
Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Chain (unit) #Condensed matter physics #Cuprate #Magnetic properties of thin films #Materials science #Mean free path #Perpendicular #Phonon #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Scattering #Spin (aerodynamics) #Superconductivity #Thermal conductivity #Thermodynamics #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1209/epl/i2003-00384-1
published as Europhys. Lett. 62, 540 (2003) · 7 pages, 3 figures
arxiv created 2003/02/27 · openalex publication_date 2003/05/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The thermal conductivity κ of the spin-(1/2) chain cuprate BaCu 2 Si 2 O 7 was measured along different crystallographic directions in the temperature region between 0.5 and 300 K. The thermal conductivity along the chain direction considerably exceeds that along perpendicular directions. Near the antiferromagnetic transition at T N = 9.2 K the data indicates enhanced scattering of phonons by critical fluctuations in the spin system. A comparison of the data above T N with available results on similar materials reveals similarities in the main features of the temperature dependence of the mean free path of itinerant spin excitations. This universal behavior is most likely caused by the spin-lattice interaction.