59 citations · 156 across the 7 of their papers we have counts for
7 papers
Field induced phase transitions in the helimagnet Ba2CuGe2O7
J. Chovan, M. Marder, N. Papanicolaou
We present a theoretical study of the two-dimensional spiral antiferromagnet Ba2CuGe2O7 in the presence of an external magnetic field. We employ a suitable nonlinear sigma model to…
Memory Effect in the Photoinduced Femtosecond Rotation of Magnetization in the Ferromagnetic Semiconductor GaMnAs
J. Wang, I. Cotoros, X. Liu +4
We report a femtosecond response in photoinduced magnetization rotation in the ferromagnetic semiconductor GaMnAs, which allows for detection of a four-state magnetic memory at the…
Femtosecond Control of the Magnetization in Ferromagnetic Semiconductors
J. Chovan, I. E. Perakis
We develop a theory of collective spin dynamics triggered by ultrafast optical excitation of ferromagnetic semiconductors. Using the density matrix equations of motion in the mean…
Ultrafast light-induced magnetization dynamics in ferromagnetic semiconductors
J. Chovan, E. G. Kavousanaki, I. E. Perakis
We develop a theory of the magnetization dynamics triggered by ultrafast optical excitation of ferromagnetic semiconductors. We describe the effects of the strong carrier spin rela…
Lattice pinning of magnetic domains in the helimagnet Ba_2CuGe_2O_7
J. Chovan, N. Papanicolaou
The layered magnetic compound Ba_2CuGe_2O_7 exhibits spiral antiferromagnetic order thanks to a Dzyaloshinskii-Moriya (DM) anisotropy that is allowed by crystal symmetry. Here we t…
Intermediate phase in the spiral antiferromagnet Ba_2CuGe_2O_7
J. Chovan, N. Papanicolaou, S. Komineas
The magnetic compound Ba_2CuGe_2O_7 has recently been shown to be an essentially two-dimensional spiral antiferromagnet that exhibits an incommensurate-to-commensurate phase transi…