Boris M. Nekrasov

Scattering in the dual regime of Yang-Baxter deformed O ( 2 N ) sigma models

Alexey S. Bychkov, Boris M. Nekrasov

We continue to explore the previously suggested dual regime of Yang-Baxter (YB) deformed O ( 2 N ) sigma models, which is a new one-parametric deformation of the O ( 2 N ) model. It can be obtained from the conventional YB …

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Soft mode behavior in transition metal doped SrTiO3 thin films on MgO substrates

Alexander V. Melentev, Elena S. Zhukova, Boris M. Nekrasov, Vasily S. Stolyarov et autres

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Soft Mode Behavior in Transition Metal Doped SrTiO3 Thin Films on MgO Substrates

Alexander V. Melentev, Elena S. Zhukova, Boris M. Nekrasov, Vasily S. Stolyarov et autres

The ferroelectric soft mode in polycrystalline pristine SrTiO3 and weakly doped SrTiO3:M (M = 2 at % Fe, Ni, Mn, Co) thin films on (001) MgO substrates has been studied using time-domain terahertz spectroscopy. Spectra of real and imaginary parts of film …

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Transition metal-doped SrTiO 3 : when does a tiny chemical impact have such a great structural response?

Mikhail V. Talanov, Adam I. Stash, С. А. Иванов, Elena S. Zhukova et autres

Weak (2 at%) doping of SrTiO 3 by Mn, Ni and Fe leads to radically different changes in structural and dielectric properties, demonstrating clear signs of pseudo Jahn–Teller effect, the first-order Jahn–Teller effect and defect-induced distortion.

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Terahertz ferroelectric soft mode in weakly doped SrTiO3: M thin films (M=Mn, Ni, Fe, Co)

Elena S. Zhukova, Boris M. Nekrasov, Marina Tyunina, Volha Vetokhina et autres

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Priroda dielektricheskoy relaksatsii v monokristallakh SrTiO3:Mn

Mikhail V. Talanov, Elena S. Zhukova, Boris M. Nekrasov, M. Savinov et autres

Dielectric spectra of SrTiO3 and SrTiO3:Mn single crystals have been studied in the frequency range of 10‒3000 cm–1 and in the temperature range of 5–297 K using time-domain terahertz spectroscopy and Fourier-transform infrared spectroscopy. A comparative analysis of the experimental results made …

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Thickness dependent superconductivity in MoRe films studied by terahertz spectroscopy

Elena S. Zhukova, Boris M. Nekrasov, Lenar S. Kadyrov, Alexander V. Melentev et autres

Terahertz time-domain spectroscopy is used to perform the first detailed studies of the electrodynamic properties of MoRe (60%/40%) films with thicknesses ranging from 10 to 100 nm. Films are prepared by magnetron sputtering technique on silicon substrates. The critical temperatures vary from …

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Nature of Dielectric Relaxation in SrTiO3:Mn Single Crystals

Mikhail V. Talanov, Elena S. Zhukova, Boris M. Nekrasov, M. Savinov et autres

Dielectric spectra of SrTiO3 and SrTiO3:Mn single crystals have been studied in the frequency range of 10‒3000 cm–1 and in the temperature range of 5–297 K using time-domain terahertz spectroscopy and Fourier-transform infrared spectroscopy. A comparative analysis of the experimental results made …

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THZ, RF AND X-RAY SPECTROSCOPY OF MN-DOPED SRTIO SINGLE CRYSTALS

Mikhail V. Talanov, Adam I. Stash, С. А. Иванов, Elena S. Zhukova et autres

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Octahedra-Tilted Control of Displacement Disorder and Dielectric Relaxation in Mn-Doped SrTiO 3 Single Crystals

Mikhail V. Talanov, Adam I. Stash, С. А. Иванов, Elena S. Zhukova et autres

Strontium titanate SrTiO 3 (STO) is a canonical example of a quantum paraelectric, and its doping with manganese ions unlocks its potential as a quantum multiferroic candidate. However, to date, the specifics of incorporation of the manganese ion into the perovskite lattice …

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