93 citations · 935 across the 30 of their papers we have counts for
30 papers
Optical phonons, spin correlations, and spin-phonon coupling in the frustrated pyrochlore magnets CdCr2O4 and ZnCr2O4
Ch. Kant, J. Deisenhofer, T. Rudolf +7
We report on infrared, Raman, magnetic susceptibility, and specific heat measurements on CdCr2O4 and ZnCr2O4 single crystals. We estimate the nearest-neighbor and next-nearest neig…
Lattice and electronic anomalies of CaFe_2As_2 studied by Raman spectroscopy
K. -Y. Choi, D. Wulferding, P. Lemmens +3
We report inelastic light scattering experiments on CaFe_2As_2 in the temperature range of 4 to 290 K. In in-plane polarizations two Raman-active phonon modes are observed at 189 a…
Microscopic Evidence of Spin State Order and Spin State Phase Separation in Layered Cobaltites RBaCo2O5.5 with R=Y, Tb, Dy, and Ho
H. Luetkens, M. Stingaciu, Yu. G. Pashkevich +6
We report muon spin relaxation measurements on the magnetic structures of RBaCo_2O_5.5 with R=Y, Tb, Dy, and Ho. Three different phases, one ferrimagnetic and two antiferromagnetic…
Hole stripe and orbital fluctuating state in LaMnO () unveiled by Raman spectroscopy
Yu. G. Pashkevich, V. P. Gnezdilov, P. Lemmens +8
Giant softening by 30 cm of the 490- and 620-cm modes is observed by Raman scattering measurements below the Curie temperature of single crystalline LaMnO ($0…
Existence of orbital polarons in ferromagnetic insulating LaSrMnO (0.110.14) evidenced by giant phonon softening
K. -Y. Choi, P. Lemmens, G. Güntherodt +6
We present an inelastic light scattering study of single crystalline (LaPr)SrMnO (, and ,). A giant softe…
Quantum phase transition in the dioptase magnetic lattice
C. Gros, P. Lemmens, K. -Y. Choi +3
The study of quantum phase transitions, which are zero-temperature phase transitions between distinct states of matter, is of current interest in research since it allows for a des…