Neutron investigation of modulated crystals
作者： R. Currat
DOI: 10.1016/0921-4526(89)90569-3
关键词: Neutron scattering 、 Field (physics) 、 Condensed matter physics 、 Nano- 、 Amplitude 、 Neutron 、 Physics 、 Phase (waves) 、 Fluctuation spectrum
摘要: Abstract We review recent neutron scattering results on modulated crystals. Two aspects are emphasized: (i) the competition between incommensurate and lock-in commensurate phases influence of external parameters, macroscopic fields defects; (ii) dynamical which characterize state, i.e. phase amplitude fluctuation spectrum. Examples chosen in field simple “one-dimensional” insulators (thiourea, NaNO 2 , ThBr 4 ), with displacive or order-disorder dynamics. Extensions to charge-density wave systems multi-component order-parameters discussed.
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