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Showing 1 to 20 of 34 for “"charge density waves"”.
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Conduction noise in sliding charge-density waves
The conduction noise from sliding charge-density waves (CDWs) is studied in NbSe$\sb3$ and K$\sb{0.3}$MoO$\sb3$ (blue bronze). A statistical analysis of the fluctuations in the noise is presented: the probability distributions of the fluctuating spectral components, the power spectra of these …
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Conduction noise in sliding charge-density waves
The conduction noise from sliding charge-density waves (CDWs) is studied in NbSe3 and Ko.3Mo03 (blue bronze). A statistical analysis of the fluctuations in the noise is presented: the probability distributions of the fluctuating spectral components, the power spectra of these fluctuations (i.e. the …
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Investigation of elastic effects of sliding charge-density waves
… softening associated with the sliding of a charge-density wave (CDW), driven by an electric field, is investigated in o-TaS$\sb3$ by use of a vibrating-reed technique. Experiments performed with a dc sliding CDW find the magnitude of the change in Young's modulus, Y, to be proportional to …
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An Nmr Test of Mcmillan's Theory of Incommensurate Charge Density Waves
… to test McMillan's proposal regarding charge density waves (CDW). We compare the temperature dependence of the NMR lineshape from 4.2 K to 130 K with predictions based on McMillan's theory, utilizing the recent x-ray diffraction results of Fleming, Moncton, McWhan, and DiSalvo. We …
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Fluctuation conductivity from charge density waves in pseudo-one-dimensional systems
… Fröhlich conductivity model, which describes a charge-density-wave phenomenon which can lead to enhanced electrical conductivity in pseudo-one-dimensional systems. The experimental facts concerning pseudo-one-dimensional systems which may illustrate aspects of the Fröhlich mechanism are …
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A NMR test of McMillan's theory of incommensurate charge density waves
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-17T16:02:12Z No. of bitstreams: 1 1981_couturie.pdf: 1565475 bytes, checksum: 903ed887d6da78e22132b287b555a60a (MD5)
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Charge Density Waves and Superconductivity in Rare Earth Compounds from First Principles
… strong electron-phonon coupling also leads to charge density waves and structural distortions which compete with superconductivity. To better understand this competition, I use first-principles simulations to study rare-earth tritellurides (RTe3) and doped rare-earth trihydrides (RH3), which …
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Structure and motion of charge density waves, and NMR study of NbSe3
"The author reports Nb93 NMR studies of the charge density wave (COW) conductor, NbSe3 , using aligned, multicrystalline samples, observing the NMR with and without current flow in the crystals. Above 144 K, where no COW's are present, an orientation and field-dependence NMR study is presented. …
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X-ray scattering studies of charge density waves in cuprate and pnictide superconductors
This Dissertation was approved for publication on 2020-12-17 at 08:47.
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Studies of charge density waves in reduced dimensions by surface x-ray scattering
The student, Xinyue Fang, accepted the attached license on 2017-10-12 at 23:43.
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Structure and Motion of Charge Density Waves: An Nmr Study of Niobium-Selenide(3)
The author reports Nb('93) NMR studies of the charge density wave (CDW) conductor, NbSe(,3), using aligned, multicrystalline samples, observing the NMR with and without current flow in the crystals.
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Transport studies and phenomenological model for sliding charge-density waves in quasi-one-dimensional conductors
… examining the dynamics of one-dimensional charge-density wave (CDW) condensates are reported. Results using rf and dc, linear and nonlinear electrical transport techniques have been obtained at temperatures below the CDW transition in the quasi-one-dimensional materials o-TaS$\sb3$, …
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Time resolved dynamics of charge density waves in solids : an uncorrelated and a correlated case
Charge density wave (CDW) is a periodic charge modulation in a metal, induced by electron-phonon or electron-electron interaction, which breaks the translational symmetry of the underlying electron gas. The charge density wave order is ubiquitous among condensed matter systems, and its equilibrium …
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Quantum Tunneling of Charge-Density Waves in Quasi-One-Dimensional Conductors (Trichalcogenide, Tantalum Trisulfide, Niobium-Triselenide)
The charge-density wave (CDW) dynamics of the linear chain compound orthorhombic TaS(,3) is characterized by extensive measurements of dc conductivity, ac admittance, direct mixing, harmonic mixing, second harmonic generation, and third harmonic generation as functions of dc bias voltage, applied …
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Light scattering from tantalum diselenide
… Below a 120 K phase transition, incommensurate charge density waves appear which introduce .additional structure into the Raman spectra. The charge density waves become commensurate below a 110 K phase transition, with a consequent tripling of the size of the unit cell. Several Raman-active …
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ΜΕΛΕΤΗ ΤΟΥ ΜΟΝΤΕΛΛΟΥ HUBBARD ΓΙΑ ΕΛΚΤΙΚΑ ΔΥΝΑΜΙΚΑ ΜΕΤΑΞΥ ΤΩΝ ΗΛΕΚΤΡΟΝΙΩΝ
… BETWEEN MAGNETISM THEORY SUPERCONDUCTIVITY AND CHARGE DENSITY WAVES, CONTRIBUTES TO THE UNIFIED UNDERSTANDING OF THESE IMPORTANT PHENOMENA. FOR THE SPECIAL CASE OF 1 ELECTRON PER LATTICESITE THE EQUIVALENT HEISENBERG HAMILTONIAN WAS STUDIED. THE RESULT IS THAT OURONE-DIMENSIONAL SYSTEM IS …
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Magnetic Penetration Depth Analysis of Unconventional Superconductors
… arises from novel methods such as charge density waves.
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Correlated dynamics of quantum wires and cigar shaped atomic gases
… Luttinger liquid (TLL) theory, are spin and charge density waves, traveling at different velocities (the spin velocity is smaller, the charge velocity greater than the Fermi velocity). These velocities are parameters of <br>the TLL theory and there is no straightforward way to extract them …
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Exploring linear and nonlinear electromagnetic responses in topological materials
… begin this research topic by understanding how charge-density waves impact electric field-induced transport in the topological system: the Weyl semimetal.Research over the past several years has reinvigorated the examination of how charge-density waves interact with topology. This renewed …
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Emergent properties of misfit layer compounds from first principles.
… (TMDs). They host Ising superconductivity, charge density waves, and good thermoelectricity. However, research has mostly focused on specific compounds and trial-and-error synthesis, making the design of misfits’ emergent properties hindered by a lack of a global picture. Our work offers an …
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