DIRECT OBSERVATION OF OPTICAL MAGNONS IN YBA2CU3O6.2

Authors
REZNIK D BOURGES P FONG HF REGNAULT LP BOSSY J VETTIER C MILIUS DL AKSAY IA KEIMER B
Citation
D. Reznik et al., DIRECT OBSERVATION OF OPTICAL MAGNONS IN YBA2CU3O6.2, Physical review. B, Condensed matter, 53(22), 1996, pp. 14741-14744
Citations number
19
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
53
Issue
22
Year of publication
1996
Pages
14741 - 14744
Database
ISI
SICI code
0163-1829(1996)53:22<14741:DOOOMI>2.0.ZU;2-2
Abstract
We have used high-energy inelastic neutron scattering to detect optica l magnons directly in antiferromagnetic YBa2Cu3O6.2. The optical magno n gap is 67+/-5 meV. This implies an intrabilayer superexchange consta nt perpendicular to the CuO2 layers of J(perpendicular to) = 0.08 J(pa rallel to) where J(parallel to) is the in-plane nearest-neighbor super exchange constant.