A5006150669- Magnetic properties of thin films
- Quantum and electron transport phenomena
- Magneto-Optical Properties and Applications
- Advanced Memory and Neural Computing
- Neural Networks and Reservoir Computing
- Advancements in Semiconductor Devices and Circuit Design
- Semiconductor materials and devices
- Multiferroics and related materials
- Magnetic Field Sensors Techniques
- Quantum-Dot Cellular Automata
- Thermal properties of materials
- Magnetic Properties and Applications
- Magnetic and transport properties of perovskites and related materials
- Semiconductor Quantum Structures and Devices
- Photonic and Optical Devices
- Physics of Superconductivity and Magnetism
- Graphene research and applications
- Quantum Computing Algorithms and Architecture
- Ferroelectric and Negative Capacitance Devices
- Ferroelectric and Piezoelectric Materials
- Thermal Radiation and Cooling Technologies
- Optical Network Technologies
- Advanced Fiber Optic Sensors
- Photonic Crystal and Fiber Optics
- Quantum Information and Cryptography
University of California, Riverside
2015-2024
Institute of Radio-Engineering and Electronics
2016-2021
Yuri Gagarin State Technical University of Saratov
2021
Saratov State University
2018-2021
Istituto Officina dei Materiali
2018
University of Perugia
2018
Georgia State University
2017
Universidade Federal do Rio de Janeiro
2017
Oakland University
2016
University of California, Los Angeles
2002-2011
We describe and analyse possible approaches to magnonic logic circuits basic elements required for circuit construction. A distinctive feature of the circuitry is that information transmitted by spin waves propagating in magnetic waveguides without use electric current. The latter makes it exploit wave phenomena more efficient data transfer enhanced functionality. schemes general computing special task processing. functional throughput gates estimated compared with conventional...
Magnonics addresses the physical properties of spin waves and utilizes them for data processing. Scalability down to atomic dimensions, operation in GHz-to-THz frequency range, utilization nonlinear nonreciprocal phenomena, compatibility with CMOS are just a few many advantages offered by magnons. Although magnonics is still primarily positioned academic domain, scientific technological challenges field being extensively investigated, proof-of-concept prototypes have already been realized...
In this work, we report on the demonstration of voltage-driven spin wave excitation, where waves are generated by multiferroic magnetoelectric (ME) cell transducers driven an alternating voltage, rather than electric current. A element consisting a magnetostrictive Ni film and piezoelectric [Pb(Mg1/3Nb2/3)O3](1−x)–[PbTiO3]x substrate was used for purpose. By applying AC voltage to piezoelectric, oscillating field is created within material, which results in strain-induced magnetic anisotropy...
We propose a concept of magnetic logic circuits engineering, which takes an advantage magnetization as computational state variable and exploits spin waves for information transmission. The consist magneto-electric cells connected via wave buses. present the result numerical modeling showing cell switching function amplitude well phase wave. phase-dependent makes it possible to engineer gates by exploiting buses passive elements providing certain phase-shift propagating waves. library...
In this work, we present experimental data demonstrating the possibility of using magnonic holographic devices for pattern recognition. The prototype eight-terminal device consists a magnetic matrix with micro-antennas placed on periphery to excite and detect spin waves. principle operation is based effect wave interference, which similar optical devices. Input information encoded in phases waves generated several edges matrix, while output corresponds amplitude inductive voltage produced by...
In this work, we consider the possibility of building magnetic analog logic devices utilizing spin wave interference for special task data processing. As an example, a multi-terminal magnonic matrix switch comprising multiferroic elements and two-dimensional grid waveguides connected via four-terminal cross-junctions. The are placed on periphery used as input/output ports signal conversion among electric domains. Data processing is accomplished use within matrix. We present results numerical...
Graphene revealed a number of unique properties beneficial for electronics. However, graphene does not have an energy band-gap, which presents serious hurdle its applications in digital logic gates. The efforts to induce band-gap via quantum confinement or surface functionalization resulted breakthrough. Here we show that the negative differential resistance experimentally observed field-effect transistors “conventional” design allows construction viable non-Boolean computational...
Holography is a technique based on the wave nature of light which allows us to utilize interference between object beam and coherent background. usually associated with images being made from light, however, this only narrow field holography. The first holograms were designed for use electron microscopes it was not until decade later advent laser that optical holographic popularized. Multiple other fields have had major contributions by using produce holograms, including acoustic used in...
We describe and analyze magnonic logic circuits enabling parallel data processing on multiple frequencies. The combine bi-stable (digital) input/output elements an analog core. transmission within the part is accomplished by spin waves, where 0 1 are encoded into phase of propagating wave. latter makes it possible to utilize a number bit carrying frequencies as independent information channels. operation illustrated numerical modeling. also present estimates potential functional throughput...
We propose and analyze a spin wave amplifier aimed to enhance the amplitude of propagating via magnetoelectric effect. The is two-layer multiferroic structure, which comprises piezoelectric ferromagnetic materials. By applying electric field layer, stress produced. In turn, changes direction easy axis in layer. rotation frequency same as through As result this two-stage process, can be amplified depending on angle rotation. present results numerical simulations illustrating operation...
We describe a spin wave modulator - spintronic device aimed to control propagation by an electric field. The consists of ferromagnetic film serving as bus combined with synthetic multiferroic comprising piezoelectric and magnetostrictive materials. Its operation is based on the stress-mediated coupling between By applying field layer, stress produced. In turn, changes direction easy axis in layer affects transport. present experimental data prototype consisting [Pb(Mg1/3Nb2/3)O3](1-x)...
We report results of an investigation the temperature dependence magnon and phonon frequencies in NiO. A combination Brillouin - Mandelstam Raman spectroscopies allowed us to elucidate evolution spectral signatures from zone center (GHz range) second-order peaks boundary (THz range). The temperature-dependent behavior bands NiO spectrum indicates presence antiferromagnetic (AF) order fluctuation or a persistent AF state at temperatures above Neel (T=523 K). Tuning intensity excitation laser...
We propose and develop reversible magnetic logic gates based on spin wave interference. The consist of passive elements including waveguides, cross-junctions, phase shifters. Logic 0 1 are encoded in the propagating (0 or π). There different possible input-output trajectories for waves, where some contain shifters others do not. In each case, particular trajectory resultant output depend input combination. redirection takes place cross junctions. Two waves coming to a junction in-phase...
We propose logic gates and circuits implemented with 2-D charge density wave (CDW) devices, which operate at room temperature. The 1T-TaS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> devices exhibit a voltage triggered phase transition between the nearly commensurate incommensurate CDW states, is accompanied by an abrupt change of resistance hysteresis. unique output characteristics such allow for building without any transistors....
We report the fabrication and performance of all-metallic three-terminal devices with tantalum diselenide thin-film conducting channels. For this proof-of-concept demonstration, layers 2H-TaSe2 were exfoliated mechanically from single crystals grown by chemical vapor transport method. Devices nanometer-scale thicknesses exhibit strongly non-linear current-voltage characteristics, unusual optical response, electrical gating at room temperature. have found that drain-source current in...
We propose an oscillatory neural network implemented with two-dimensional (2-D) tantalum disulfide devices operating in the change density wave regime at room temperature. An elementary cell of consists two 1T-TaS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> connected series. Such a has constant output and states. All cells have same bias voltage. There is current flowing through mode. The oscillations occur certain voltage due to...
We present a feasibility study of logic circuits utilizing spin waves for information transmission and processing. As an alternative approach to the transistor-based architecture, with wave bus do not use charge as carrier. In this work we describe general concept illustrate its performance by numerical simulations based on available experimental data. Theoretical estimates results signal attenuation, phase velocity, minimum energy required per bit in are obtained. The transport parameters...
In this paper, we present recent developments in magnonic holographic memory devices exploiting spin waves for information transfer. The comprise a magnetic matrix and wave-generating/detecting elements placed on the edges of waveguides. consists grid waveguides connected via cross junctions. Magnetic are incorporated within junction, while read-in read-out accomplished by propagating through We experimental data spin-wave propagation NiFe yttrium iron garnet Y <sub...
Abstract We describe a magnetic field sensor based on spin wave interferometer. Its sensing element consists of cross junction with four micro-antennas fabricated at the edges. Two these antennas are used for excitation while two other detection inductive voltage produced by interfering waves. waves propagating in orthogonal arms may accumulate significantly different phase shifts depending magnitude and direction external field. This phenomenon is utilized sensing. The sensitivity attains...
Determining the prime factors of a given number N is problem, which requires super-polynomial time for conventional digital computers. A polynomial-time algorithm was invented by P. Shor quantum However, realization computers associated with significant technological challenges in achieving and preserving entanglement. Prime factorization can be also solved using classical wave interference without In this work, we present experimental data showing utilizing spin interference. The includes...