We combine time-resolved pump-probe magneto-optical Kerr effect and photoelectron spectroscopy experi-ments supported by theoretical analysis to determine the relaxation dynamics of delocalized electrons in half-metallic ferromagnetic manganite La1−xSrxMnO3. We observe that the half-metallic character of La1−xSrxMnO3determines the timescale of both the electronic phase transition and the quenching of magnetization, revealing aquantum isolation of the spin system in double-exchange ferromagnets extending up to hundreds of picoseconds.We demonstrate the use of time-resolved hard x-ray photoelectron spectroscopy as a unique tool to single out theevolution of strongly correlated electronic states across a second-order phase transition in a complex material.
Transient quantum isolation and critical behavior in the magnetization dynamics of half-metallic manganites / T. Pincelli, R. Cucini, A. Verna, F. Borgatti, M. Oura, K. Tamasaku, T. Lee, C. Schlueter, S. Günther, C. Horst Back, M. Dell'Angela, R. Ciprian, P. Orgiani, A. Petrov, F. Sirotti, V. Dediu, I. Bergenti, P. Graziosi, F. Miletto Granozio, Y. Tanaka, M. Taguchi, H. Daimon, J. Fujii, G. Rossi, G. Panaccione. - In: PHYSICAL REVIEW. B. - ISSN 2469-9969. - 100:4(2019 Jul 12), pp. 045118.1-045118.11. [10.1103/PhysRevB.100.045118]
Transient quantum isolation and critical behavior in the magnetization dynamics of half-metallic manganites
T. PincelliPrimo
;G. RossiPenultimo
;
2019
Abstract
We combine time-resolved pump-probe magneto-optical Kerr effect and photoelectron spectroscopy experi-ments supported by theoretical analysis to determine the relaxation dynamics of delocalized electrons in half-metallic ferromagnetic manganite La1−xSrxMnO3. We observe that the half-metallic character of La1−xSrxMnO3determines the timescale of both the electronic phase transition and the quenching of magnetization, revealing aquantum isolation of the spin system in double-exchange ferromagnets extending up to hundreds of picoseconds.We demonstrate the use of time-resolved hard x-ray photoelectron spectroscopy as a unique tool to single out theevolution of strongly correlated electronic states across a second-order phase transition in a complex material.File | Dimensione | Formato | |
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