R. Saint-Martin

Ballistic heat transport of quantum spin excitations as seen in SrCuO2

Fundamental conservation laws predict ballistic, i.e., dissipationless transport behaviour in one-dimensional quantum magnets. Experimental evidence, however, for such anomalous transport has been lacking ever since. Here we provide experimental evidence for ballistic heat transport in a S=1/2 Heisenberg chain. In particular, we investigate high purity samples of the chain cuprate SrCuO2 and observe a huge magnetic heat conductivity

Hubbard band versus oxygen vacancy states in the correlated electron metal SrVO3

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Spinon heat transport and spin–phonon interaction in the spin-1/2 Heisenberg chain cuprates Sr2CuO3 and SrCuO2

. An extremely large spinon mean free path of more than a micrometer demonstrates that

Charge and magnetic states of rutile TiO2 doped with Cr ions

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Bond disorder and breakdown of ballistic heat transport in the spin-1/2 antiferromagnetic Heisenberg chain as seen in doped SrCuO2

is only limited by extrinsic scattering processes which is a clear signature of ballistic transport in the underlying spin model.

Effect of different in-chain impurities on the magnetic properties of the spin chain compound SrCuO2 probed by NMR

Strong electron correlations in solids are at the heart of fascinating phenomena such as high temperature superconductivity, whose understanding remains a prominent open problem in Physics. A central prediction of dynamical mean field theory (DMFT) is the breaking of Landaus Fermi liquid, which describes extremely well simple metals like copper, into itinerant heavy quasiparticles and localized Mott-Hubbard states. To test it, electronic structure calculations based on DMFT are usually benchmarked against the photoemission spectra of SrVO

Bond disorder and spinon heat transport in theS=12Heisenberg spin chain compound Sr2CuO3: From clean to dirty limits

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Amorphous ferromagnetism and re-entrant magnetic glassiness in single-crystalline Sm 2 Mo 2 O 7

, a cubic perovskite with one

Low temperature ballistic spin transport in the S?=?1/2 antiferromagnetic Heisenberg chain compound SrCuO2

d

Suppression of the impurity-induced local magnetism by the opening of a spin pseudogap in Ni-dopedSr2CuO3

electron per unit cell that is considered the gold standard in this field. However, the present study shows that the UV synchrotron radiation used in the photoemission experiments creates oxygen vacancies, resulting in a strong peak of defect states essentially on top of the SrVO