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331.
V. S. Zakhvalinskii I. M. Golev L. V. Borisenko T. V. Prokopova A. N. Khmara E. A. Pilyuk D. A. Kolesnikov 《Bulletin of the Russian Academy of Sciences: Physics》2016,80(9):1115-1118
Layers of porous silicon (PS), multilayered ZnO films, and heterostructures based on them are obtained. The surface morphology, chemical and phase composition of the PS layers and ZnO films, and the transverse cleavage of ZnO–PS nanocomposite, are investigated via energy-dispersive X-ray spectral analysis (EDX), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The current–voltage characteristics of Al/Ag/p-Si(100)/PS/ZnO/Ag/Al and Al/Ag/p-Si(100)/PS/ZnO/SiC/Ag/Al heterostructures are studied. 相似文献
332.
Drüschler M Borisenko N Wallauer J Winter C Huber B Endres F Roling B 《Physical chemistry chemical physics : PCCP》2012,14(15):5090-5099
Ionic liquids are of high interest for the development of safe electrolytes in modern electrochemical cells, such as batteries, supercapacitors and dye-sensitised solar cells. However, electrochemical applications of ionic liquids are still hindered by the limited understanding of the interface between electrode materials and ionic liquids. In this article, we first review the state of the art in both experiment and theory. Then we illustrate some general trends by taking the interface between the extremely pure ionic liquid 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate and an Au(111) electrode as an example. For the study of this interface, electrochemical impedance spectroscopy was combined with in situ STM and in situ AFM techniques. In addition, we present new results for the temperature dependence of the interfacial capacitance and dynamics. Since the interfacial dynamics are characterised by different processes taking place on different time scales, the temperature dependence of the dynamics can only be reliably studied by recording and carefully analysing broadband capacitance spectra. Single-frequency experiments may lead to artefacts in the temperature dependence of the interfacial capacitance. We demonstrate that the fast capacitive process exhibits a Vogel-Fulcher-Tamman temperature dependence, since its time scale is governed by the ionic conductivity of the ionic liquid. In contrast, the slower capacitive process appears to be Arrhenius activated. This suggests that the time scale of this process is determined by a temperature-independent barrier, which may be related to structural reorganisations of the Au surface and/or to charge redistributions in the strongly bound innermost ion layer. 相似文献
333.
Kordyuk AA Borisenko SV Zabolotnyy VB Geck J Knupfer M Fink J Büchner B Lin CT Keimer B Berger H Pan AV Komiya S Ando Y 《Physical review letters》2006,97(1):017002
Applying the Kramers-Kronig consistent procedure, developed earlier, we investigate in detail the formation of the quasiparticle spectrum along the nodal direction of high-Tc cuprates. The heavily discussed "70 meV kink" on the renormalized dispersion exhibits a strong temperature and doping dependence when purified from structural effects such as bilayer splitting, diffraction replicas, etc. This dependence is well understood in terms of fermionic and bosonic constituents of the self-energy. The latter follows the evolution of the spin-fluctuation spectrum, emerging below some doping dependent temperature and sharpening below Tc, and is mainly responsible for the formation of the kink in question. 相似文献
334.
Trinckauf J Hänke T Zabolotnyy V Ritschel T Apostu MO Suryanarayanan R Revcolevschi A Koepernik K Kim TK Zimmermann MV Borisenko SV Knupfer M Büchner B Geck J 《Physical review letters》2012,108(1):016403
We present angle-resolved photoemission studies of (La{1-z}Pr{z}){2-2x}Sr{1+2x}Mn{2}O{7} with x=0.4 and z=0.1, 0.2, and 0.4 along with density functional theory calculations and x-ray scattering data. Our results show that the bilayer splitting in the ferromagnetic metallic phase of these materials is small, if not completely absent. The charge carriers are therefore confined to a single MnO{2} layer, which in turn results in a strongly nested Fermi surface. In addition to this, the spectral function also displays clear signatures of an electronic ordering instability well below the Fermi level. The increase of the corresponding interaction strength with z and its magnitude of ~400 meV make the coupling to a bare phonon highly unlikely. Instead we conclude that fluctuating order, involving electronic and lattice degrees of freedom, causes the observed renormalization of the spectral features. 相似文献
335.
We propose the methods for studying electrokinetic phenomena in magnetic colloidal systems (magnetic fluids), which make it
possible to use the magnetic properties of particles of the disperse phase. Electrophoresis and the sedimentation potential
in a kerosene-based magnetic fluid are studied. It is shown that only a small part (approximately one-thousandth) of all disperse
particles in the magnetic fluid under investigation are charged, the sign of the particle charge being negative. 相似文献
336.
A survey devoted to A0-condensate in gauge theories at high temperature is presented. Both theoretical foundations of the spontaneously generated condensate and known methods of its calculation are discussed. As the most important consequence, the SU (N) global symmetry breakdown is investigated in detail. The influence of A0 on matter fields is studied in different aspects. Some new results concerning this subject are reported as well. 相似文献