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Phonons and magnons in stripe-ordered nickelates. A Raman scattering study

Phonons and magnons in stripe-ordered nickelates. A Raman scattering study

Electronic correlation effects in La₂-xSrxNiO₄ (x = 1/3 and 0.225) lead to spontaneous phase separation into microscopic spin/charge stripes with commensurate and incommensurate order, respectively. Raman scattering experiments on such single crystalline materials show a rich phenomenology of...

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Bibliographic Details
Main Authors: Gnezdilov, V., Kurnosov, V., Pashkevich, Yu., Lemmens, P., Tranquada, J., Choi, K.-Y., Güntherodt, G., Nakajima, K., Yeremenko, A.
Format: Article
Language:English
Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2005
Series:Физика низких температур
Subjects:
Низкотемпеpатуpный магнетизм
Online Access:http://dspace.nbuv.gov.ua/handle/123456789/121393
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Summary:Electronic correlation effects in La₂-xSrxNiO₄ (x = 1/3 and 0.225) lead to spontaneous phase separation into microscopic spin/charge stripes with commensurate and incommensurate order, respectively. Raman scattering experiments on such single crystalline materials show a rich phenomenology of phonon and magnon anomalies due to the new, self-organized periodicities. These effects are observable as function of temperature but can also be induced by cooling in a seemingly small magnetic field leading to a reorganization of stripe structure.

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