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Showing 1 to 20 of 64 for “"structural transition"”.

  1. CHARGE ORDER AND STRUCTURAL TRANSITION IN TOPOLOGICAL SEMIMETAL FAMILY AAL4

    Saraf, Prathum2023

    … order, respectively. SrAl$_4$ hosts a second transition at 94K that is hysteretic in temperature and is a structural transition to a monoclinic structure. Here I report on the charge density wave in SrAl$_4$ and the effect of the structural transition on the physical and electronic properties …

    maryland Repository record

  2. Light-induced structural transition and reflectivity of a silica-gallium interface

    Albanis, VassiliosUniversity of Southampton2003

    … 12 °C to 36 °C, across the solid to melt phase transition. Transient pump-probe reflectivity measurements revealed the dynamics of a silica-gallium interface reflectivity change in the visible part of the spectrum for the first time. Reflectivity rise times of a few ps were observed and the …

    soton Repository record

  3. Structural transition across the Appalachian Fold Front in North Central Pennsylvania

    Decker, Robert W. (Robert Wayne), 1927-Massachusetts Institute of Technology1951

    Thesis. (M.S.) Massachusetts Institute of Technology. Dept. of Geology, 1951.

    mit Repository record

  4. Elucidation of Charge Density Wave Stability and Defect Interactions in the Highly-Ordered Structural Transition Metal Dichalcogenide System 1T-TaS2

    Engen, Paige2023

    … CDW stability using high-resolution and in situ transition electron microscopy (TEM).Direct observation of the CDWs allows for characterizing the interaction between the superlattice and the underlying lattice, including topological defects. Various methods have been used to visualize the CDW …

    umn Repository record

  5. Studies on Aperiodic and Quasiperiodic Crystals

    Mertz, John EdwardUniversity of Illinois at Urbana-Champaign2015

    … that the one-component quasicrystal undergoes a structural transition to an aperiodic crystal near $\rho \cong$ 1.03. In the binary quasicrystal there was not a pronounced structural transition, but rather local regions of stability and instability. In both the one- and two-component aperiodic …

    uiuc Repository record

  6. Transport and thermodynamic studies of the superconductors A3T4Sn13 and YFe2Ge2

    Chen, XiaoyeUniversity of Cambridge2017

    … in the order parameter associated with the transition and often, as a result, display interesting properties. In this dissertation, we have used a variety of experimental probes such as Shubnikov-de Haas quantum oscillations, thermal conductivity and heat capacity, to better understand two …

    cambridge Repository record

  7. A powder neutron scattering study of magnetism in potassium copper trifluoride as a function of hydrostatic pressure

    Nguyen, Brian Tuan-anhUniversity of Illinois at Urbana-Champaign2019

    … to be modified at P ~ 7 kbar due to a glassy structural transition. Single crystal studies by Alexander Thaler of the MacDougall lab indicated relative peak intensities of the (001) and (003) magnetic Bragg peaks were not suppressed with pressure. Interestingly, the suppression of the (201) …

    uiuc Repository record

  8. Thermal expansion and magnetostriction studies on iron pnictides

    Wang, LiranTechnische Universität Dresden

    … on this material. The lattice effects at the structural and the magnetic phase transition have been investigated and the phase diagram upon F-doping has been studied. A main result is the observation of a previously unknown fluctuation regime for the doping level $\mathnormal{x}\leqslant$ 0.04 …

    qucosa-diss

  9. COMPOSITION AND PRESSURE DEPENDENT STUDY ON WEYL SEMIMETAL Mo1-xWxTe2

    Dahal, RabinUniversity of Houston2020

    … up to 650 K at ambient pressure reveal that the structural transition temperature (Ts) increases linearly with increasing W content in Mo1−xWxTe2. The observed Ts of MoTe2 at ambient pressure is 249 K and that of WTe2 is 613 K. Temperature- dependent synchrotron XRD measurements further confirm …

    houston Repository record

  10. Kinetochore Structural Plasticity and its Regulation in <i>Saccharomyces cerevisiae</i>

    Dhatchinamoorthy, KarthikThe Open University2018

    … yeast, <i>S.cerevisiae</i>, to elucidate a novel structural transition of the kinetochore. During anaphase, the microtubule undergoes rapid depolymerization. Kinetochore tracking of microtubule during this phase is critical for chromosome segregation, but how this tracking is achieved is not well …

    the-open-u Repository record

  11. Raman scattering studies of spinels CoV2O4 and MnV2O4

    Byrum, Taylor MUniversity of Illinois at Urbana-Champaign2016

    … phonon in order to determine the material's structural properties and explore coupling between the lattice and other degrees of freedom. Temperature-dependent studies confirm that the cubic symmetry of CoV2O4 is retained down to low temperatures (T = 7 K), unlike other spinel vanadates. The …

    uiuc Repository record

  12. Superlattice formation in group IV-B transition metal dichalcogenides

    Woo, Ka-Chiu Eddie2011

    … up into several additional modes below the phase transition. In the infrared study, there is a dramatic shift in the Drude edge as well as new absorption peaks at low temperature. These observed phenomena are related to the energy gap which opens up in the band structure below the phase transition …

    uiuc Repository record

  13. The Solid State Ferric Spin-Crossover Transition: Spectroscopic, Magnetic, and Structural Investigations (Moessbauer, Epr, High, Low)

    Timken, Mark DarrellUniversity of Illinois at Urbana-Champaign2014

    … undergo a thermally discontinuous spin-crossover transition (T(,c)(TURN)230K). Thermal hysteresis ((DELTA)T(,c)(TURN)12K) and the sensitivity of the transition to sample perturbations indicate that the spin-state transformation involves a first-order structural transition. A single-crystal X-ray …

    uiuc Repository record

  14. Superconductivity in the proximity of a quantum critical point

    Logg, Peter WilliamUniversity of Cambridge2015

    … fermionic system, the suppression of continuous transitions to absolute zero can result in a low temperature quantum fluid which deviates strongly from typical metallic behaviour; unconventional superconductivity can be induced by the strange metal region surrounding the zero-temperature phase …

    cambridge Repository record

  15. High-temperature superconductivity in a family of iron pnictide materials

    Gillett, JackUniversity of Cambridge2011

    … two, most notably the lack of a splitting of the structural and magnetic transitions in the first species. I also discuss the effect of pressure, which can lead to superconductivity in lightly doped samples for very modest pressures; and annealing, which increases transition temperatures within …

    cambridge Repository record

  16. Structural and Elastic Properties of Degenerate SnO Monolayers at Finite Temperature

    Sharmin, Afsana2024

    … such as FeS and FeSe mono-layers undergo structural and superconducting phase transitions that are tunable by doping. Representing another material platform with a litharge structure but without valence d-electrons, SnO monolayers also display a structural ground state with a degenerate …

    arkansas Repository record

  17. Exploring the pressure- and magnetic-field-induced phases of orbital-ordering KCuF3 and single molecule magnet Mn12-acetate: Crystal growth and Raman scattering studies

    Yuan, ShiUniversity of Illinois at Urbana-Champaign2014

    … softening below the putative orbital-ordering transition—suggesting that a lattice instability persists below this transition—and a previously unidentified tetragonal-to-orthorhombic structural transition near TS=50 K at temperatures slightly higher than the onset of Néel order, TN=40 K. A …

    uiuc Repository record

  18. Unexpected mechanical properties of nucleic acids

    Drozdetski, Aleksander VladimirovichVirginia Tech2016

    … screening, RNA actually becomes stiffer due to a structural transition from the internal binding of the counterions.

    vt Repository record

  19. Computational Study of Carbon-Based Low-Dimensional Materials on Structures, Properties and Applications

    Liu, MingjieRice University2016

    … performance and intriguing metal-insulator transition under tension has been demonstrated. The properties of proposed 1D boron nanostructures have also been investigated and a constant-tension structural transition between two boron phases has been revealed. Secondly, two examples for the …

    rice Repository record

  20. Crystal Growth, Atomic Ordering, Phase Transitions in Pseudobinary Constituents of the Metastable Quaternary (gallium-Antimony)(1-X)(germanium(2)(1-Y)tin(2y))(x) (Semiconductor, Sputtering, Ion Bombardment, X-Ray Diffraction, Electron Microscopy)

    Shah, Syed Ismat UllahUniversity of Illinois at Urbana-Champaign2014

    … analyses are used to show that an order-disorder structural transition from zincblende to diamond occurs in metastable (GaSb)(,1-x)(Ge(,2))(,x) and (GaSb)(,(1-x))(Ge(,2(1-y))Sn(,2y))(,x) alloys at a critical composition x(,c) even though the short-range order remains perfect throughout, i.e., …

    uiuc Repository record

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