Lanceros-Méndez, S., Köhler, M., Schaack, G., Klöpperpieper, A.
The ferroelectric (FE) betaine arsenate (BA) and the antiferroelectric (AF) betaine phosphate (BP) are structurally very closely related and mixed crystals of BAxBP1-x can be grown over the whole...
Lanceros-Méndez, S., Mendes, J. A., Köhler, M., Schaack, G.
Temperature and frequency dependent hysteresis loop measurements have been carried out along the phase diagram of ferroelectric (FE) betaine at-senate (BA) and antiferroelectric (AF) betaine...
OPTICAL PHONONS OF TERBIUM-, DYSPROSIUM-, AND YTTERBIUM-GARNET, (1998)
Mace,G., Schaack,G., Ng,Toaning, Koningstein,J. A.
A comparison is made of the phonon spectra of several rare earth aluminum garnet crystals. The conclusion drawn is that the Raman Spectra with shifts >400 reciprocal cm can be interpreted in terms of...
ZEEMAN-RAMAN TRANSITIONS OF Tb(+3) IN A CUBIC CRYSTAL, (1998)
From the behavior of the positions of electronic Raman transitions of the trivalent terbium ion of TbAlG as function of an external magnetic field (Zeeman-Raman effect), the energy of four of the...
Schüller, Christian, Krause, Jürgen, Schaack, G., Weimann, G., Panzlaff, K.
By means of resonance Raman spectroscopy we have investigated intersubband transitions of quasi-two-dimensional (2D) hole gases in p-type modulation-doped GaAs/Ga1-xAlxAs quantum-well structures. The...
Kirchner, M., Schüller, Christian, Krause, Jürgen, Schaack, G., Panzlaff, K., Weimann, G.
By means of resonance Raman spectroscopy we have observed a characteristic shift of hole-intersubband transitions with excitation energy in p-doped GaAs/AlxGa1-xAs quantum-well structures. As...
Collective intersubband excitations in p-doped GaAs-AlGaAs multiple quantum wells (1992)
Schüller, Christian, Kraus, J., Latussek, V., Schaack, G., Ebeling, J. K.
We report on Raman spectroscopic investigations of collective spin-density (SDW) and charge-density waves (CDW) in the two-dimensional hole gas of a p-modulation doped GaAs/AlxGa1-xAs multiple...
Kraus, J., Ils, P., Schüller, Christian, Schaack, G., Ebeling, J. K., Schlapp, W., ...
The authors have applied resonant Raman spectroscopy to two p-type modulation-doped GaAs-GaAlAs multiple-quantum wells (MQW) with well widths dW=10 and 30 nm. In both samples one of the hole...
Dahl, M., Ils, P., Kraus, J., Müller, B., Schaack, G., Schüller, Christian, ...
We have performed resonant Raman spectroscopy on two p-type modulation-doped GaAs---AlGaAs multiple quantum well structures with well widths dW = 10 nm and dW = 30 nm. With the frequency of the...
MAGNETIC FIELD DEPENDENT RESTSTRAHLEN SPECTRA IN PARAMAGNETIC CeF3 (1981)
Magnetic field dependent changes in the Eu-reststrahlen spectra of CeF3 (frequency shifts, splittings and reduction of bandwidths) have been observed at T = 1.6 K, B ≤ 7 T, differing in Voigt-...
MAGNETIC FIELD DEPENDENT RESTSTRAHLEN SPECTRA IN PARAMAGNETIC CeF3 (1981)
Magnetic field dependent changes in the Eu-reststrahlen spectra of CeF3 (frequency shifts, splittings and reduction of bandwidths) have been observed at T = 1.6 K, B ≤ 7 T, differing in Voigt-...
MAGNETIC FIELD DEPENDENT RESTSTRAHLEN SPECTRA IN PARAMAGNETIC CeF3 (1981)
Magnetic field dependent changes in the Eu-reststrahlen spectra of CeF3 (frequency shifts, splittings and reduction of bandwidths) have been observed at T = 1.6 K, B ≤ 7 T, differing in Voigt-...
ELECTRONIC AND PHONON-RAMAN-SPECTRA OF THE RARE-EARTH-TRICHLORIDES. (1969)
Koningstein, J. A., Mace, G., Schaack, G.
Author Institution: Department of Chemistry, Carleton University