Enderle M, Rønnow HM, McMorrow DF, Regnault LP, Dhalenne G, Revcholevschi A, Vorderwisch P, Schneider H, Smeibidl P, Meissner M. Excitations of the field-induced quantum soliton lattice in CuGeO(3).
PHYSICAL REVIEW LETTERS 2001;
87:177203. [PMID:
11690306 DOI:
10.1103/physrevlett.87.177203]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2000] [Indexed: 05/23/2023]
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 CuGeO(3), 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.
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