Publication

Excitations of the field-induced quantum soliton lattice in CuGeO3

2001
Journal Articles

Abstract

The incommensurate magnetic soliton lattice in the high-field phase of a spin-Peierls system results from quantum fluctuations. We have used neutron scattering techniques to study CuGeO3, allowing us to obtain the first complete characterization of the excitations of the soliton lattice. Three distinct excitation branches are observed, all of which are gapped. The two highest energy modes have minimum gaps at the commensurate wave vector and correspond to the creation or annihilation of soliton pairs. The third mode is incommensurate and is discussed in relation to theoretical predictions.

Official source

https://infoscience.epfl.ch/entities/publication/d2d9c18a-d58a-496c-97bf-510d6e45ebd7

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2001
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/d2d9c18a-d58a-496c-97bf-510d6e45ebd7

About this result

Related concepts (32)

Soliton

In mathematics and physics, a soliton or solitary wave is a self-reinforcing wave packet that maintains its shape while it propagates at a constant velocity. Solitons are caused by a cancellation of nonlinear and dispersive effects in the medium. (Dispersive effects are a property of certain systems where the speed of a wave depends on its frequency.) Solitons are the solutions of a widespread class of weakly nonlinear dispersive partial differential equations describing physical systems.

Toda lattice

The Toda lattice, introduced by , is a simple model for a one-dimensional crystal in solid state physics. It is famous because it is one of the earliest examples of a non-linear completely integrable system. It is given by a chain of particles with nearest neighbor interaction, described by the Hamiltonian and the equations of motion where is the displacement of the -th particle from its equilibrium position, and is its momentum (mass ), and the Toda potential .

Neutron scattering

Neutron scattering, the irregular dispersal of free neutrons by matter, can refer to either the naturally occurring physical process itself or to the man-made experimental techniques that use the natural process for investigating materials. The natural/physical phenomenon is of elemental importance in nuclear engineering and the nuclear sciences. Regarding the experimental technique, understanding and manipulating neutron scattering is fundamental to the applications used in crystallography, physics, physical chemistry, biophysics, and materials research.

Related publications (7)

Excitations of the field-induced quantum soliton lattice in CuGeO3

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Octave-spanning soliton Kerr microcomb with a record number of comb lines at an electronically detectable repetition rate in a single Si3N4 racetrack resonator

Phase classification

Observing Fast Phase Transitions in Individual Nanocrystals through Single-Photon Detection

Excitations of the field-induced quantum soliton lattice in CuGeO3

Chat with Graph Search

Octave-spanning soliton Kerr microcomb with a record number of comb lines at an electronically detectable repetition rate in a single Si3​N4​ racetrack resonator

Phase classification

Observing Fast Phase Transitions in Individual Nanocrystals through Single-Photon Detection

Octave-spanning soliton Kerr microcomb with a record number of comb lines at an electronically detectable repetition rate in a single Si3N4 racetrack resonator