46 citations · 247 across the 11 of their papers we have counts for
11 papers
Flat-band spin dynamics and phonon anomalies of the saw-tooth spin-chain system FeO(SeO)
V. P. Gnezdilov, Yu. G. Pashkevich, V. S. Kurnosov +11
Fe ions form saw-tooth like chains along the axis of the oxo-selenite FeO(SeO) and an onset of long-range magnetic order is observed for temperatur…
Optical phonon dynamics and electronic fluctuations in the Dirac semimetal Cd3As2
A. Sharafeev, V. Gnezdilov, R. Sankar +2
Raman scattering in the three-dimensional Dirac semimetal Cd3As2 shows an intricate interplay of electronic and phonon degrees of freedom. We observe resonant phonon scattering due…
Longitudinal magnon, inversion breaking and magnetic instabilities in the pseudo-Kagome francisites Cu3Bi(SeO3)2O2X with X=Br, Cl
V. Gnezdilov, Yu. Pashkevich, V. Kurnosov +6
We performed Raman studies and a dielectric characterization of the pseudo-kagome Cu3Bi(SeO3)2O2X (X = Cl, Br). These compounds share competing nearest-neighbour ferromagnetic exch…
Coupling of spin and lattice modes in the S=1/2 two-dimensional antiferromagnet KVO with magneto-dielectric couplings
K. -Y. Choi, P. Lemmens, V. P. Gnezdilov +2
Lattice dynamics and magnetic excitations are investigated to elucidate the origin of magneto-dielectric effects in the S=1/2 two-dimensional quantum spin compound KVO.…
Dynamical lattice instability versus spin liquid state in a frustrated spin chain system
V. Gnezdilov, P. Lemmens, Yu. G. Pashkevich +4
The low-dimensional s=1/2 compound (NO)[Cu(NO3)3] has recently been suggested to follow the Nersesyan-Tsvelik model of coupled spin chains. Such a system shows unbound spinon excit…
Interplay of Spin and Lattice Degrees of Freedom in the Frustrated Antiferromagnet CdCr_2O_4: High-field and Temperature Induced Anomalies of the Elastic Constants
Subhro Bhattacharjee, S. Zherlitsyn, O. Chiatti +7
Temperature and magnetic field studies of the elastic constants of the chromium spinel CdCr_2O_4 show pronounced anomalies related to strong spin-phonon coupling in this frustrated…
Spectral sensitive phonon wipeout due to a fluctuating spin state in a Fe2+ coordination polymer
V. Gnezdilov, P. Lemmens, P. Scheib +7
Raman scattering in the spin-crossover system [Fe(pmd)(H2O){Au(CN)2}2]*H2O reveals a complex three-phase spin-state transition in contrast to earlier observations in magnetization…
Iron pnictides: Single crystal growth and effect of doping on structural, transport and magnetic properties
G. L. Sun, D. L. Sun, M. Konuma +6
We demonstrate the preparation of large, free standing iron pnictide single crystals with a size up to 20 x 10 x 1 mm3 using solvents in zirconia crucibles under argon atmosphere.…
Magnetic crossover and complex excitation spectrum of the ferromagnetic/antiferromagnetic spin-1/2 chain system alpha-TeVO4
V. Gnezdilov, P. Lemmens, A. A. Zvyagin +5
We report magnetic susceptibility, specific heat, and Raman scattering investigations of alpha-TeVO4 containing V-O edge-sharing chains. These chains promote a system of ferromagne…
Evidence for local lattice distortions in giant magnetocapacitive CdCr2S4
V. Gnezdilov, P. Lemmens, Yu. G. Pashkevich +6
Raman scattering experiments on CdCr2S4 single crystals show pronounced anomalies in intensity and frequency of optical phonon modes with an onset temperature T*=130 K that coincid…
Orbiton-mediated multi-phonon scattering in LaSrMnO
K. -Y. Choi, P. Lemmens, G. Güntherodt +6
We report on Raman scattering measurements of single crystalline LaSrMnO (=0, 0.06, 0.09 and 0.125), focusing on the high frequency regime. We observe multi-phon…