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2 edition of Coherent relaxation and acceleration of atoms in nonequilibrium crystals found in the catalog.

Coherent relaxation and acceleration of atoms in nonequilibrium crystals

V. I. Sugakov

Coherent relaxation and acceleration of atoms in nonequilibrium crystals

by V. I. Sugakov

  • 295 Want to read
  • 25 Currently reading

Published by Academy of Sciences of Ukraine, Institute for Nuclear Research in Kiev .
Written in English

    Subjects:
  • Crystals -- Defects.,
  • Relaxation (Nuclear physics),
  • Collisional excitation.

  • Edition Notes

    Other titlesKogerentnai͡a︡ relaksat͡s︡ii͡a︡ i uskorenie atomov v neravnovesnykh kristallakh
    StatementV.I. Sugakov.
    SeriesPreprint KINR ;, 93-10
    Classifications
    LC ClassificationsQD921 .S83 1993
    The Physical Object
    Pagination17, [2] p. :
    Number of Pages17
    ID Numbers
    Open LibraryOL422086M
    LC Control Number98126977

    @article{osti_, title = {Intermolecular electron transfer from intramolecular excitation and coherent acoustic phonon generation in a hydrogen-bonded charge-transfer solid}, author = {Rury, Aaron S., E-mail: [email protected] and Sorenson, Shayne and Dawlaty, Jahan M.}, abstractNote = {Organic materials that produce coherent lattice phonon excitations in response to external stimuli may. Analysis of experimental data by different authors shows that diffusion coefficients of substitution atoms and interstitials in this temperature range significantly increase depending on dislocation density and grain boundaries length. Diffusion acceleration in defects area of crystal structure is described in [6,8,10,13,20]. The dislocations.

    Photonic band gap (PBG) structures in photonic crystals (PCs) together with the characteristic dispersion properties have stimulated considerable interest in the study of fundamental photonic science and also in the development of new photonic technology 1,2, most significant new features induced by the PBG are the inhibition of atom spontaneous emission and the localization of light 4,5,6.   A phonon (from the Greek, sound) is a quantum of vibration that propagates in a discrete medium in the form of waves owing to the interaction between the atoms [14, 15].We can associate a quasiparticle, a phonon, having the energy and quasimomentum with each such wave. Phonons in a solid arise from the quantization of the elastic deformation field, when a spatially ordered system of atoms.

    Optically induced spin-transfer probed by energy and spin-resolved transient absorption spectroscopy (Conference Presentation) Paper Author(s): Felix Willems, Clemens von Korff Schmising, Christian Strüber, Daniel Schick, W. Dieter Engel, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Germany); J. Kay Dewhurst, Max-Planck-Institut für Mikrostrukturphysik. Relaxation process of electrons in the L valley governs ν c. Another model is that the energy relaxation time is governed by relaxation process of electrons in the L valley [50]. The electrons start to be accelerated at the bottom of the Γ valley, scattered into the L valley, relax and dwell there, and, then, scattered back to the Γ.


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Coherent relaxation and acceleration of atoms in nonequilibrium crystals by V. I. Sugakov Download PDF EPUB FB2

adshelp[at] The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86ACited by: 3. Molecular dynamics simulations of coherent optical photon emission from shock waves in crystals Evan J. Reed,1,2,* Marin Soljačić,2 Richard Gee,1 and J.

Joannopoulos2 1Lawrence Livermore National Laboratory, Livermore, CaliforniaUSA 2Center for Materials Science and Engineering and Research Laboratory of Electronics, Massachusetts Institute of Technology.

Summary form only given. A coherent acceleration of atoms can be realized by an adiabatic sequence of Bragg reflections from an accelerating standing light wave. The arrangement of laser beams for such an acceleration is shown. The atom is illuminated by two counterpropagating laser beams.

The fixed frequency of the pump laser /spl omega//sub 1/ is far detuned (/spl Delta/=/spl omega//sub 1. 1. Introduction. With the technology of laser cooling blooming, the internal quantum state of atom has been precisely manipulated.Thus, the precise measurements based on atom interference have been developing rapidly, due to the better coherence of cold atoms, like gravity acceleration, gravitational constant G, fine structure constant, time frequency standard, by: 1.

In the DAM, the Hamiltonian, Φ, is given by (2) Φ= 1 4 ∑ i=1 N ∑ j=1 m k ij (r ij −a ij) 2 + ∑ l E S l, where N is the total number of atoms, m the number of interacting atoms with the ith atom, k ij the spring constant between ith and jth atom, r ij the distance, a ij is r ij at stress-free state, and E l S is the interfacial energy Cited by: 9.

The relaxation of nonequilibrium phonons was also studied in recent publication [48]. In addition to electronelectron and electron-phonon collisions, the phonon-phonon collisions were considered.

Black phosphorus has recently attracted significant attention for its highly anisotropic properties. A variety of ultrafast optical spectroscopies has been applied to probe the carrier response to photoexcitation, but the complementary lattice response has remained unaddressed.

Here we employ femtosecond electron diffraction to explore how the structural anisotropy impacts the lattice dynamics. Vibrational relaxation and dephasing of two-phonon bound states in molecular crystals Article (PDF Available) in Physical review.

B, Condensed matter 42(4) September with 32 Reads. Coherent provides a comprehensive portfolio of laser-based technologies including lasers, laser sub-systems, and laser machines for a broad range of commercial, industrial, and scientific applications.

From cutting the strongest steel to investigating a single cell, we enable the success of our customers. Explore the latest full-text research PDFs, articles, conference papers, preprints and more on ATOMS IN MOLECULES.

Find methods information, sources, references or conduct a literature review on. There are two atoms in each unit cell, and the center of inversion symmetry lies midway between them.

The Brillouin zone (BZ) of the rhombohedral crystal is a slightly squashed version of the BZ of an fcc crystal. With two atoms in each unit cell, bismuth has six phonon branches, among which three are acoustic and three are optical. We apply a single-cycle THz pulse E THz with amplitude up to ~ kV cm −1, which selectively excites coherent oscillations of \({E}_{u}^{1}\) phonons, shown in.

First, consider the case of a simple harmonic oscillator, as shown in Figure (a).The equation of motion of a weight attached to a spring is generally expressed as () m x ¨ + kx = 0, where x is the displacement of the weight from its equilibrium position, and x ¨ is its second time derivative. In this case, m and k are the mass of the weight and the spring constant, respectively, and.

Books. Publishing Support. Login. However, the non-equilibrium physics of these systems, in particular in the regime where coherent and dissipative processes contribute on equal footing, is yet far from being understood.

Pichler H, Daley A J and Zoller P Nonequilibrium dynamics of bosonic atoms in optical lattices. PHYSICAL REVIEW B 84, () Nonequilibrium quasiparticle relaxation dynamics in single crystals of hole- and electron-doped BaFe 2As 2 Darius H.

Torchinsky, 1James W. McIver, David Hsieh, G. Chen,2 J. Luo,2 N. Wang,2 and Nuh Gedik1,* 1Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts,USA 2Beijing National Laboratory for. The preparation of SiC crystals doped with various impurities introduced during the process of sublimation growth and diffusion is described.

The growth of SiC crystals was carried out by a sublimation-sandwich method, proposed by us in Crystals of the n- and p-type conductivity with maximum content of electrically active impurities (of the order of cm−3) were obtained.

The concept of quasiparticles in solid-state physics is an extremely powerful tool for describing complex many-body phenomena in terms of single-particle excitations1.

Introducing a simple. Volume 43A, number 6 PHYSICS LETTERS 23 April THE COHERENT EXCITATION OF ATOMS MOVING THROUGH A CRYSTAL EXPERIMENTAL RESULTS V.V. OKOROKOV, D.L. TOLCHENKOV, I.S. KHIZHNYAKOV Yu.N. CHEBLUKOV and LAPITSKY Institute of Theoretical and Experimental Physics, Moscow, USSR G.A.

IFEROV and Yu.N. This book gives a good review of the state of art of the modern spectroscopy of scintillators and provides timing properties of the scintillation materials under wide debates.

Study of the transient phenomena is a powerful tool which is applied in chemistry, biology and semiconductor physics. where α is absorption coefficient (in cm −1), hv is photon energy, kθ x is energy of the momentum conserving (MC) phonons involved in the electronic transition, E gc (x) is the bandgap and A is a constant.

Actually more than one phonon participates in the indirect electronic transitions. These several MC phonons have a common reduced wave-vector, but they have different energies.

The U.S. Department of Energy's Office of Scientific and Technical Information.II. VO 2 CRYSTALLOGRAPHY AND BASIC STRUCTURAL DYNAMICS. The two thermodynamically stable structures involved in the phased transition of VO 2 are depicted in Fig.

Fig the transition temperature, which is about K for stoichiometric single crystals, the vanadium atoms arrange into pairs in a monoclinic phase M 1 (Fig. 1(a)), 14 whereas above the transition temperature. Optical Levitation and Applications. The next advance in optical trapping and manipulation was the demonstration of the optical levitation trap in air, under conditions in which gravity plays a significant role ().In the levitation trap, as shown in Fig.

Fig.2, 2, a single vertical beam confines a macroscopic particle at a point E where gravity and the upward scattering force balance.