174 citations · 987 across the 24 of their papers we have counts for
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Localization effects in the disordered Ta interlayer of multilayer Ta-FeNi films: Evidence from dc transport and spectroscopic ellipsometry study
N. N. Kovaleva, D. Chvostova, O. Pacherova +4
Using dc transport and wide-band spectroscopic ellipsometry techniques, we study localization effects in the disordered metallic Ta interlayer of different thickness in the multila…
Raman scattering study and lattice-dynamics calculations in YTiO3: Precursor of the magnetic phase transition in the phonon anomalies
N. N. Kovaleva, O. E. Kusmartseva, A. Maljuk
The origin of the low-temperature ferromagnetic instability in YTiO3 driven by the interplay between lattice, orbital, spin, and charge degrees of freedom is on the background of l…
Control of Mooij correlations at the nanoscale in the disordered metallic Ta - nanoisland FeNi multilayers
N. N. Kovaleva, F. V. Kusmartsev, A. B. Mekhiya +12
Localisation phenomena in highly disordered metals close to the extreme conditions determined by the Mott-Ioffe-Regel (MIR) limit when the electron mean free path is approximately…
Optical evidence of quantum rotor orbital excitations in orthorhombic manganites
N. N. Kovaleva, K. I. Kugel, Z. Potucek +8
In magnetic compounds with Jahn-Teller (JT) ions (such as Mn3+ or Cu2+), the ordering of the electron or hole orbitals is associated with cooperative lattice distortions. There the…
Formation of metallic magnetic clusters in a Kondo-lattice metal: Evidence from an optical study
N. N. Kovaleva, K. I. Kugel, A. V. Bazhenov +5
Magnetic materials are usually divided into two classes: those with localised magnetic moments, and those with itinerant charge carriers. We present a comprehensive experimental (s…
Low-energy Mott-Hubbard excitations in LaMnO_3 probed by optical ellipsometry
N. N. Kovaleva, Andrzej M. Oles, A. M. Balbashov +4
We present a comprehensive ellipsometric study of an untwinned, nearly stoichiometric LaMnO_3 crystal in the spectral range 1.2-6.0 eV at temperatures 20 K < T < 300 K. The complex…