85 citations · 281 across the 30 of their papers we have counts for
30 papers
Resonant cooling of nuclear spins by optically-oriented holes in MAPbI perovskite crystals
Mladen Kotur, Dmitri R. Yakovlev, Nataliia E. Kopteva +3
Resonant cooling of nuclear spins by photogenerated spin-oriented holes is demonstrated for MAPbI perovskite crystals. It is evidenced by Hanle-effect measurements under helici…
Hyperfine versus exchange interaction in the spin dynamics of spatially indirect excitons in CsPbI perovskite nanocrystals
Timur S. Shamirzaev, Nataliia E. Kopteva, Dmitry S. Smirnov +7
We study the dynamics of recombination, optical orientation, and optical alignment of excitons in ensembles of CsPbI nanocrystals (NCs), synthesized in a glass matrix. In lar…
Layer-dependent Landé -factors of electrons, holes, and excitons in two-dimensional Ruddlesden-Popper lead halide perovskites
Nataliia E. Kopteva, Dmitri R. Yakovlev, Mikhail O. Nestoklon +9
Two-dimensional Ruddlesden-Popper lead halide perovskites provide a valuable platform for tailoring charge and spin properties through quantum confinement and reduced symmetry. Whi…
Hyperfine interaction of electrons and holes with nuclei probed by optical orientation in MAPbI perovskite crystals
Mladen Kotur, Nataliia E. Kopteva, Dmitri R. Yakovlev +3
Optical orientation of electron and hole spins by circularly polarized light is investigated for MAPbI single crystals. The Hanle and polarization recovery effects measured in…
Magnetoluminescence of ZnMnSe/BeMnTe heterostructures with type-II band alignment at millikelvin temperatures
Dennis Kudlacik, Linda Kersting, Nataliia E. Kopteva +3
The magneto-optical properties of a ZnMnSe/BeMnTe diluted magnetic semiconductor heterostructure with type-II band alignment are investigated a…
Exciton spin structure in lead halide perovskite semiconductors explored via the spin dynamics in magnetic field
Vladimir L. Zhiliakov, Nataliia E. Kopteva, Irina A. Yugova +3
We theoretically investigate the spin structure and spin dynamics of excitons in bulk lead halide perovskite semiconductors with cubic, tetragonal, and orthorhombic crystal symmetr…
Non-local synchronization of continuous time crystals in a semiconductor
Alex Greilich, Nataliia E. Kopteva, Vladimir L. Korenev +6
Synchronization resulting in unified collective behavior of the individual elements of a system that are weakly coupled to each other has long fascinated scientists. Examples range…
Dynamic polarization of nuclear spins by optically-oriented electrons and holes in lead halide perovskite semiconductors
Mladen Kotur, Pavel S. Bazhin, Kirill V. Kavokin +4
A theory of dynamic polarization of the nuclear spin system via optically-oriented charge carriers in lead halide perovskites is developed and compared with the experiments perform…
Confined acoustic phonons in CsPbI3 nanocrystals explored by resonant Raman scattering on excitons
Carolin Harkort, Ina V. Kalitukha, Nataliia E. Kopteva +8
Optical properties of the lead halide perovskites nanocrystals are controlled by confined excitons and rich spectrum of confined acoustic and optical phonons. We study experimental…
Efficient launch of shear phonons in photostrictive halide perovskites
Dmytro Horiachyi, Mikhail O. Nestoklon, Ilya A. Akimov +10
Optical generation of transverse coherent phonons by femtosecond light pulses is appealing for high-speed sub-THz active control of material properties. Lead-free double perovskite…
Resonant spin amplification and accumulation in MAPbI single crystals
Erik Kirstein, Dmitri R. Yakovlev, Evgeny A. Zhukov +4
Quantum technologic and spintronic applications require reliable semiconducting materials that enable a significant, long-living spin polarization of electronic excitations and off…
Optical orientation of excitons and charged carriers in MAPbI perovskite single crystals in the orthorhombic phase
Nataliia E. Kopteva, Dmitri R. Yakovlev, Eyüp Yalcin +6
Optical orientation of exciton and carrier spins by circularly polarized light is the basic phenomenon in the spin physics of semiconductors. Here, we investigate spin orientation…
Coherent spin dynamics of electrons and holes photogenerated with large kinetic energy in lead halide perovskite crystals
Evgeny A. Zhukov, Dmitri R. Yakovlev, Erik Kirstein +4
The coherent spin dynamics of electrons and holes are studied in a FA0.9Cs0.1PbI2.8Br0.2 perovskite bulk crystal, using time-resolved Kerr ellipticity in a two-color pump-probe sch…
Effect of crystal symmetry of lead halide perovskites on the optical orientation of excitons
Nataliia E. Kopteva, Dmitri R. Yakovlev, Eyüp Yalcin +8
The great variety of lead halide perovskite semiconductors represents an outstanding platform for studying crystal symmetry effects on the spin-dependent properties. Access to them…
Exploring nonlinear dynamics in periodically driven time crystal: from synchronized to chaotic motion
Alex Greilich, Nataliia E. Kopteva, Vladimir L. Korenev +1
The coupled electron-nuclear spin system in an InGaAs semiconductor as testbed of nonlinear dynamics can develop auto-oscillations, resembling time-crystalline behavior, when conti…
Optical spin orientation of localized electrons and holes interacting with nuclei in an FACsPbIBr perovskite crystal
Dennis Kudlacik, Nataliia E. Kopteva, Mladen Kotur +8
Optical orientation of carrier spins by circularly polarized light is the basic concept and tool of spin physics in semiconductors. We study the optical orientation of electrons an…
Hole spin coherence in InAs/InAlGaAs self-assembled quantum dots emitting at telecom wavelengths
E. Evers, N. E. Kopteva, V. Nedelea +6
We report measurements of the longitudinal and transverse spin relaxation times of holes in an ensemble of self-assembled InAs/InAlGaAs quantum dots (QDs), emitting in the telecom…
Continuous time crystal in an electron-nuclear spin system: stability and melting of periodic auto-oscillations
A. Greilich, N. E. Kopteva, A. N. Kamenskii +3
Crystals spontaneously break the continuous translation symmetry in space, despite the invariance of the underlying energy function. This has triggered suggestions of time crystals…
Evidencing the squeezed dark nuclear spin state in lead halide perovskites
E. Kirstein, D. S. Smirnov, E. A. Zhukov +6
Coherent many-body states are highly promising for robust and scalable quantum information processing. While far-reaching theoretical predictions have been made for various impleme…
Coherent Spin Dynamics of Electrons in Two-Dimensional (PEA)PbI Perovskites
Erik Kirstein, Evgeny A. Zhukov, Dmitri R. Yakovlev +6
The versatile potential of lead halide perovskites and two-dimensional materials is merged in the Ruddlesen-Popper perovskites having outstanding optical properties. Here, the cohe…
Mode locking of hole spin coherences in CsPb(Cl,Br) perovskite nanocrystals
E. Kirstein, N. E. Kopteva, D. R. Yakovlev +8
The spin physics of perovskite nanocrystals with confined electrons or holes is attracting increasing attention, both for fundamental studies and spintronic applications. Here, sta…
The Landé factors of electrons and holes in lead halide perovskites: universal dependence on the band gap
E. Kirstein, D. R. Yakovlev, M. M. Glazov +16
The Landé or -factors of charge carriers are decisive for the spin-dependent phenomena in solids and provide also information about the underlying electronic band structure. We…
Zeeman and Davydov splitting of Frenkel excitons in the antiferromagnet CuBO
N. E. Kopteva, D. Kudlacik, D. R. Yakovlev +4
The optical spectra of antiferromagnetic copper metaborate CuBO are characterized by an exceptionally rich structure of narrow absorption lines due to electronic transition…
Shielding of external magnetic field by dynamic nuclear polarization in (In,Ga)As quantum dots
E. Evers, N. E. Kopteva, I. A. Yugova +3
The dynamics of the coupled electron-nuclear spin system is studied in an ensemble of singly-charged (In,Ga)As/GaAs quantum dots (QDs) using periodic optical excitation at 1 GHz re…