Spinon-phonon interaction in the low-dimensional SrCuO2
Among them, the Mott insulating spin chains system SrCuO2 was shown to exhibit a strikingly high and anisotropic magnetic heat conduction, which peaks at around 600 WK-1m-1 at 37K. Indeed, heat in SrCuO2 is conveyed by phonon and fractional S= 1/2 magnetic excitations, namely, spinons. Heat conduction by spinons occurs only along the spin chains direction and has been proven to be ballistic. The interplay between magnetic and lattice quasi-particles and chemical or structural defects during the heat transport process gives rise to various two-quasi-particles and quasi-particle-defects scattering mechanisms that govern the resulting heat conduction properties. A deep understanding of these different interaction paths is thus fundamental in order to have a clear insight of the heat transport process. However, such a microscopic description of the system is still lacking. We propose to examine the possible coupling between spinon and phonons resulting from spinon-LA phonon interaction, using polarized neutron scattering on IN20.
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BOUNOUA Dalila; DAMAY Francoise; ENDERLE Mechthild; MSIKA David; PETIT Sylvain; PINSARD-GAUDART Loreynne; SAINT-MARTIN Romuald and Tobias WEBER. (2018). Spinon-phonon interaction in the low-dimensional SrCuO2. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1585
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