Th. Hartmann
University of Marburg
10 Papers
237 Citations
Th. Hartmann is an academic researcher from University of Marburg. The author has contributed to research in topics: Magnetic semiconductor & Ferromagnetism. The author has an hindex of 9, co-authored 10 publications.
Chat about Author
Papers
Optical Spectroscopic Studies of N‐Related Bands in Ga(N, As)
H. Grüning,Limei Chen,Th. Hartmann,P. J. Klar,Wolfram Heimbrodt,F. Höhnsdorf,J. Koch,Wolfgang Stolz +7 more
TL;DR: In this paper, the unusual band formation at the Γ-point and in the vicinity of the L-point in the alloy system Ga(N, As) was investigated by various spectroscopic methods.
76
Spin injection, spin transport and spin coherence
Michael Oestreich,M Bender,Jens Hübner,Daniel Hägele,W. W. Rühle,Th. Hartmann,Peter J. Klar,Wolfram Heimbrodt,M. Lampalzer,Kerstin Volz,Wolfgang Stolz +10 more
TL;DR: In this article, the authors discuss advances, advantages and problems of spintronics through the example of a semiconductor laser whose emission intensity and polarization are modulated by the spin orientation of electrons.
64
Ferromagnetic resonance studies of (Ga,Mn)As with MnAs clusters
Th. Hartmann,M. Lampalzer,Peter J. Klar,Wolfgang Stolz,Wolfram Heimbrodt,H.-A. Krug von Nidda,Alois Loidl,L. E. Svistov +7 more
TL;DR: In this paper, the temperature and angular dependence of ferromagnetic resonances originating from MnAs clusters embedded in a Ga1−xMnxAs host matrix with x ≥ 0.1% were reported.
51
Monitoring the sign reversal of the valence band exchange integral in (Ga,Mn)As
Wolfram Heimbrodt,Th. Hartmann,Peter J. Klar,M. Lampalzer,Wolfgang Stolz,Kerstin Volz,Andreas K. Schaper,W. Treutmann,H.-A. Krug von Nidda,Alois Loidl,T. Ruf,V. F. Sapega +11 more
TL;DR: In this article, the successful growth of magnetic Ga 1− x Mn x As layers on (1 0 0) GaAs substrates by metal-organic vapour-phase epitaxy was reported.
36
Tuning of the average p-d exchange in (Ga,Mn)As by modification of the Mn electronic structure
Th. Hartmann,Shuangli Ye,Peter J. Klar,Wolfram Heimbrodt,M. Lampalzer,Wolfgang Stolz,Thomas Kurz,Alois Loidl,H.-A. Krug von Nidda,Daniel Wolverson,James Davies,H. Overhof +11 more
TL;DR: In this article, it was shown that the magnitude and sign of the RKKY interaction parameter are strongly dependent on the local electronic configuration of the Mn ions in (Ga,Mn)As alloys.
22