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Magnetoelastic coupling in strongly correlated electron systems studied by inelastic neutron scattering: a review
Zi-Ru Ma1, Baijiang Lv1, Xin Li1
1National Key Laboratory of Neutron Science and Technology, Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics (CAEP), Mianyang 621999, People's Republic of China.
Abstract:
Inelastic neutron scattering spectroscopy is an indispensable tool to probe the lattice and spin dynamics in condensed matter physics. Over the past several decades, great efforts have been devoted to the study of novel ground state behaviors in strongly correlated electron systems. Particular emphasis has been put on the magnetoelastic coupling, which arises from the coupling of spins to the strains. With such effect, the magnetic excitations and the lattice vibrations could no longer be studied independently. The low-lying elementary excitation spectra can be modified in a way that distinct hybrid excitations like crystal electric field (CEF)-phonon vibrons, CEF-phonon anticrossing, and magnon-phonon anticrossing could occur at specific positions in the reciprocal space. In this review, recent progress in experimental studies with the generalization of the original phenomenological model, and possible challenges in the study of magnetoelastic coupling in f-electron compounds are surveyed.
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