info:eu-repo/semantics/article
Magnon squeezing in antiferromagnetic MnF2 and FeF2
Fecha
2006-12Registro en:
Zhao, Jimin; Bragas, Andrea Veronica; Merlin, R.; Lockwood, D.J.; Magnon squeezing in antiferromagnetic MnF2 and FeF2; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 73; 18; 12-2006; 1-11
1098-0121
CONICET Digital
CONICET
Autor
Zhao, Jimin
Bragas, Andrea Veronica
Merlin, R.
Lockwood, D.J.
Resumen
Quantum squeezing of a collective spin-wave excitation or magnon using femtosecond optical pulses has been used to generate correlated pairs of spins with equal and opposite wave vectors in antiferromagnetic MnF2 and FeF2. In the squeezed state, the fluctuations of the magnetization of a crystallographic unit cell vary periodically in time and are reduced below that of the ground state quantum noise. The results obtained, including their temperature dependence for FeF2, are compared with earlier spontaneous Raman scattering measurements. The squeezing effect is observed to be at least one order of magnitude stronger in FeF2 than in MnF2. © 2006 The American Physical Society.