Publications (26)
Optical properties of metallic (III,Mn)V ferromagnetic semiconductors in the infrared to visible range
E. M. Hankiewicz, T. Jungwirth, T. Dietl +2
We report on a study of the ac conductivity and magneto-optical properties of metallic ferromagnetic (III,Mn)V semiconductors in the infrared to visible spectrum. Our analysis is b…
Influence of non-local exchange on RKKY interactions in III-V diluted magnetic semiconductors
C. Timm, A. H. MacDonald
The RKKY interaction between substitutional Mn local moments in GaAs is both spin-direction-dependent and spatially anisotropic. In this Letter we address the strength of these ani…
Tailoring the magnetism of GaMnAs films by ion irradiation
Lin Li, S. D. Yao, Shengqiang Zhou +10
Ion irradiation of semiconductors is a well understood method to tune the carrier concentration in a controlled manner. We show that the ferromagnetism in GaMnAs films, known to be…
Bogoliubov Fermi surfaces stabilized by spin-orbit coupling
Henri Menke, C. Timm, P. M. R. Brydon
It was recently understood that centrosymmetric multiband superconductors that break time-reversal symmetry generically show Fermi surfaces of Bogoliubov quasiparticles. We investi…
Theory for underdoped high-T_c superconductors: effects of phase fluctuations
F. Schaefer, C. Timm, D. Manske +1
In underdoped cuprates, T_c is thought to be determined by Cooper pair phase fluctuations because of the small superfluid density n_s. Experimentally, T_c is found to scale with n_…
NMR and NQR Fluctuation Effects in Layered Superconductors
D. Fay, J. Appel, C. Timm +1
We study the effect of thermal fluctuations of the s-wave order parameter of a quasi two dimensional superconductor on the nuclear spin relaxation rate near the transition temperat…