https://doi.org/10.1140/epjb/e2008-00256-0
Theoretical investigation of an acoustic wave in molecular magnets via electromagnetically induced transparency
1
Department of Physics, Hubei Normal University, Huangshi, 435002, P.R. China
2
Department of Physics, Huazhong University of Science and Technology, Wuhan, 430074, P.R. China
Corresponding author: a liujibing0328@126.com
Received:
18
October
2007
Revised:
5
March
2008
Published online:
10
July
2008
Using the Schrödinger-Maxwell equations, we theoretically investigate the propagation properties of a transverse acoustic wave in a crystal of molecular magnets in the presence of two strong ac resonant magnetic fields and a weak acoustic wave. The acoustic wave can freely propagate in the magnetic molecule medium (under appropriate conditions) due to quantum interference. Furthermore, using the slowly varying envelope approximation, we discuss the propagation equation of the acoustic wave, which includes the high order nonlinear term. The results show that a crystal of molecular magnets can support the propagation of acoustic wave solitons via electromagnetically induced transparency. We also obtain the analytical expressions for the phase shift and absorption coefficient of the acoustic wave within certain parameters.
PACS: 75.50.Xx – Molecular magnets / 43.25.+y – Nonlinear acoustics / 42.50.Gy – Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008
