Raman scattering in a two-layer antiferromagnet
نویسندگان
چکیده
منابع مشابه
Raman scattering in a two-layer antiferromagnet.
Two-magnon Raman scattering is a useful tool to verify recent suggestions concerning the value of the interplanar exchange constant in antiferromagnetic two-layer systems, such as YBa2Cu3O61x . We present a theory for Raman scattering in a two-layer antiferromagnet. We study the spectra for the electronic and magnetic excitations across the charge transfer gap within the one-band Hubbard model ...
متن کاملTwo-magnon Raman scattering in a spin density wave antiferromagnet
We present the results for a model calculation of resonant two-magnon Raman scattering in a spin density wave (SDW) antiferromagnet. The resonant enhancement of the two-magnon intensity is obtained from a microscopic analysis of the photon-magnon coupling vertex. By combining magnon-magnon interactions with ‘triple resonance‘ phenomena in the vertex function the resulting intensity line shape i...
متن کاملOrder-disorder transition in a two-layer quantum antiferromagnet.
We have studied the antiferromagnetic order – disorder transition occurring at T = 0 in a 2-layer quantum Heisenberg antiferromagnet as the interplane coupling is increased. Quantum Monte Carlo results for the staggered structure factor in combination with finite-size scaling theory give the critical ratio Jc = 2.51 ± 0.02 between the inter-plane and in-plane coupling constants. The critical be...
متن کاملRaman lasing and cascaded coherent anti-Stokes Raman scattering of a two-phonon Raman band.
Raman lasing of a two-phonon Raman band in the anti-Stokes side is demonstrated. Two femtosecond light pulses with identical wavelengths are irradiated onto a SrTiO3 crystal in a cross-beam configuration. Under low excitation power, several wave-mixing signals with identical wavelengths are emitted. When the power exceeds a critical value, cascaded coherent anti-Stokes Raman scattering (CARS) s...
متن کاملRaman-scattering study of GaP/InP strained-layer superlattices.
Strained-layer superlattices (SL's) made up of alternate GaP and InP layers constitute a system where the strain is symmetrized when grown on GaAs substrates. While both components present a large lattice mismatch to GaAs ( —3.6% GaP, +3.8% InP) giving rise to large biaxial deformations in the individual layers, the net value of strain in the whole SL is very small, thus favoring their stabilit...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 1996
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.54.3468