146 citations · 477 across the 7 of their papers we have counts for
7 papers
Phase separation in iron chalcogenide superconductor Rb0.8+xFe1.6+ySe2 as seen by Raman light scattering and band structure calculations
Yu. Pashkevich, V. Gnezdilov, P. Lemmens +7
We report Raman light scattering in the phase separated superconducting single crystal Rb0.77Fe1.61Se2 with Tc = 32 K. The spectra have been measured in a wide temperature range 3K…
Muon-spin-rotation study of the magnetic structure in the tetragonal antiferromagnetic state of weakly underdoped BaKFeAs
B. P. P. Mallett, Yu. G. Pashkevich, A. Gusev +2
With muon spin rotation (SR) we studied the transition between the orthorhombic antiferromagnetic (o-AF) and the tetragonal antiferromagnetic (t-AF) states of a weakly underdop…
Interplay between lattice and spin states degree of freedom in the FeSe superconductor: dynamic spin state instabilities
Vladimir Gnezdilov, Yurii G. Pashkevich, Peter Lemmens +5
Polarized Raman-scattering spectra of superconducting, single-crystalline FeSe evidence pronounced phonon anomalies with temperature reduction. A large 6.5% hardening of the B_1g(F…
Coexistence of Superconductivity and Magnetism in FeSe_1-x under Pressure
M. Bendele, A. Ichsanow, Yu. Pashkevich +7
An extended investigation of the electronic phase diagram of FeSe up to pressures of \,GPa by means of ac and dc magnetization, zero field muon spin rotation (Z…
Anomalous optical phonons in FeTe pnictides: spin state, magnetic order, and lattice anharmonicity
V. Gnezdilov, Yu. Pashkevich, P. Lemmens +8
Polarized Raman-scattering spectra of non-superconducting, single-crystalline FeTe are investigated as function of temperature. We have found a relation between the magnitude of or…
Interplay of Rare Earth and Iron magnetism in RFeAsO with R = La, Ce, Pr, and Sm: A muon spin relaxation study and symmetry analysis
H. Maeter, H. Luetkens, Yu. G. Pashkevich +11
We report zero field muon spin relaxation (muSR) measurements on RFeAsO with R = La, Ce, Pr, and Sm. We study the interaction of the FeAs and R (rare earth) electronic systems in t…