Yu. V. Gulyaev

Research Field

The influence of external factors on electron field emission from thin film nanofilament carbon structures

Л. А. Чернозатонский Z. Ya. Kosakovskaya Yu. V. Gulyaev N.I. Sinitsyn G.V. Torgashov

The influence of temperature and residual gas pressure on the field emission of thin-film nanotube carbon structures has been studied. These structures are shown to exhibit low work functions. They are promising for fabrication of effective low-voltage field emitters and low-temperature thermal emitters.

Carbon fibers

10.1109/ivmc.1995.487067

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Low-loss optical waveguides in ZnS X Se 1-x /GaAs heteroepitaxial structures

Soviet physics. Doklady (1988)

Yu. V. Gulyaev L. Zakharov П. И. Кузнецов Yu. L. Kopylov В. Б. Кравченко

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Current-induced inverse population of spin subbands in magnetic junctions

JETP Letters (2007)

Yu. V. Gulyaev P. E. Zilberman А. И. Крикунов A. I. Panas É. M. Éphshteĭn

Antiparallel (mathematics)

Spin Current

10.1134/s002136400703006x

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Leaky Stoneley waves at a moving interphase boundary

Acoustical Physics (2001)

Yu. V. Gulyaev N. S. Shevyakhov

Interphase

10.1134/1.1403544

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On the scaling properties of two unidirectionally coupled period-doubling systems in the presence of noise

Technical Physics Letters (2001)

Yu. V. Gulyaev Yu. V. Kapustina А. П. Кузнецов С. П. Кузнецов

10.1134/1.1424406

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Spin-Injection Stimulated Radiation of Terahertz Waves in Magnetic Junctions (“Twaser” Action)

Diffusion and defect data, solid state data. Part B, Solid state phenomena/Solid state phenomena (2015)

A.V. Chernych S. G. Chigarev Yu. V. Gulyaev Г. М. Михайлов A. I. Panas

We report on apparently the first observation of terahertz stimulated radiation in magnetic junctions due to nonequilibrium spins injected by current at room temperatures. The contact between ferromagnetic layers is investigated and so the contact between ferromagnetic and antiferromagnetic layers. The current flowing in the structure creates an inversed population of spin energy levels. After a placing of such a structure in a resonator positive feedback and stimulated emission appears. When current is growing, we observe the relatively narrow (in frequencies) peak - analogous to laser generation but at terahertz frequencies. For the higher currents we observe the picture of electromagnetic turbulence.

Spin wave

10.4028/www.scientific.net/ssp.233-234.399

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A diffusion model of microwave gas discharge in a magnetic field for the case of distributed injection of energy

Doklady Physics (1998)

Yu. V. Gulyaev I. D. Cherkasov R. K. Yafarov

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Interaction and navigation of robots based on ultrawideband direct chaotic communication

Journal of Communications Technology and Electronics (2016)

Yu. V. Gulyaev A. S. Dmitriev В. А. Лазарев Т. И. Мохсени Maxim Popov

Narrowband

Mobile Robot Navigation

10.1134/s1064226916080040

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Research of the field emission of fractal blads patterns of large length

Yu. V. Gulyaev V.N. Koro Yu. A. Grigor’ev G.A. Rehen

The looking up of effective, cost-effective (cold) sources of intensive beam couplings is one of actual problems of modern vacuum micro- and nanoelectronics. As far as it is known, the difficulties of deriving of large absolute values of a current of field emission are connected to extremely small values of the effective area of emission component, which forms 10/sup -6/ to 10/sup -8/ part from the area of a cathodic substrate. One of methods of increasing of the effective area of emission is the transferring from regular bivariate tips of gratings to surface patterns blade or planar-end configuration with extended fractal boundaries. Apparently, that substantial surface micro- and nanostructure from this or that fraction can be referred to natural fractals. As it was shown, field emission properties of close set film and monolithic carbon patterns on conductive substrates can be essentially improved by a simple vacuum discharge converting 2D pattern with mean values of a period 65-70 nm, altitude 7-8 nm, and radius of curvature of tops 2-3 nm, in discontinuous branching.

Radius of curvature

10.1109/ivesc.2004.1414140

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Work function estimate for electrons emitted from nanotube carbon cluster films

Journal of Vacuum Science & Technology B Microelectronics and Nanometer Structures Processing Measurement and Phenomena (1997)

Yu. V. Gulyaev N.I. Sinitsyn G.V. Torgashov Sh. T. Mevlyut A. I. Zhbanov

Relying on the obtained theoretical and experimental results the electronic work function from a nanotube carbon film was estimated. It was shown that these structures have an electronic work function that is substantially lower than that for graphite. The influence of the film surface relief on its emission was regarded.

Carbon fibers

10.1116/1.589329

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Citations (36)

Yu. V. Gulyaev

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