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Condensed Matter > Strongly Correlated Electrons
Title: Total Moment Sum Rule for Magnets in the Vicinity of Quantum Critical Point
(Submitted on 3 Dec 2020)
Abstract: It is known that the longitudinal and transverse excitation modes can exist in the vicinity of a quantum critical point in the ordered phase of quantum magnetic systems. The total moment sum rule for such systems is derived on the basis of the extended spin-wave theory, where both longitudinal and transverse magnetic excitations are taken into account. The sum rule is resolved into elastic, one-magnon, and two-magnon components. The formulation is applicable to spin systems with the longitudinal mode, such as $S=1$ systems with single-ion anisotropy of easy-plane type and spin dimer systems. The result helps us analyze and understand measured data of inelastic neutron scattering.
Submission history
From: Masashige Matsumoto [view email][v1] Thu, 3 Dec 2020 02:59:43 GMT (4105kb,D)
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