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Direct observation of optical magnons in YBa2Cu3O6.2

Citation:

Reznik, D. ; Bourges, P. ; Fong, H. F. ; Regnault, L. P. ; Bossy, J. ; Vettier, C. ; Milius, D. L. ; Aksay, I. A. ; Keimer, B. Direct observation of optical magnons in YBa2Cu3O6.2. Physical Review B 1996, 53, 14741-14744.

Date Published:

Jun

Type of Article:

Article

ISBN Number:

0163-1829

Accession Number:

WOS:A1996UR04700012

Abstract:

We have used high-energy inelastic neutron scattering to detect optical magnons directly in antiferromagnetic YBa2Cu3O6.2. The optical magnon gap is 67+/-5 meV. This implies an intrabilayer superexchange constant perpendicular to the CuO2 layers of J(perpendicular to) = 0.08 J(parallel to) where J(parallel to) is the in-plane nearest-neighbor superexchange constant.

Last updated on 07/02/2018