Complex magnetic fluctuations in Ca2RuO4 above the Néel temperature
The 4d-electron system Ca2RuO4 (CRO) plays host to a complex interplay between magnetic and electronic correlations. Recent neutron experiments revealed a novel soft magnetism, with strong single-ion anisotropy, and 'Higgs' amplitude fluctuations in the spin wave spectrum. On the other hand, the nature of the electronic order in CRO above the magnetic ordering temperature is still under debate, and the emergence of an exotic spin-nematic or an orbitally ordered state have been suggested. Here, propose to study the magnetic fluctuations prevalent in proximity to TN that are fundamentally related to the nature of the magnetism, with the magnetic order parameter possibly coupling to the electronic states. Thus, a thorough understanding of the magnetic dynamics above the magnetic transition will help elucidate the nature of the electronic order in CRO.
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TREPKA Heiko; BOEHM Martin; HEPTING Matthias; Maximilian J. Krautloher and PORRAS PEREZ GUERRERO Juan Pablo. (2020). Complex magnetic fluctuations in Ca2RuO4 above the Néel temperature. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-03-1738
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