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Showing 1 to 20 of 324 for “"charge density"”.
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Low frequency charge-density wave dynamics
The low frequency dynamics of the charge-density waves in NbSe$\sb3$ and TaS$\sb3$ were investigated using low frequency conductance fluctuations. Simultaneous measurements of the fluctuations in the voltage and the differential resistance revealed a theory of threshold voltage fluctuations can …
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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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Experimental charge density studies of highly polar bonds
… question the experimentally determined electron density was analyzed using Bader’s theory of ‘Atoms in Molecules’ (AIM). This allows a quantitative evaluation of properties derived from the electron density, such as the Laplacian, the ellipticitiy and the ratio of the highest charge concentration …
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Photoemission Studies of Novel Charge Density Wave Systems
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-23T18:44:52Z No. of bitstreams: 1 Kidd_Timothy.pdf: 17087980 bytes, checksum: fe906676ec83edda201c0d424afa9f10 (MD5)
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Charge-Density-Wave Transport in Quasi - One-Dimensional Conductors
… remarkable collective-transport properties of charge-density-wave (CDW) conductors is presented. Measurements of current oscillations observed in response to applied dc voltages and of mode-locking phenomena observed in response to combined ac and dc voltages indicate a nearly complete analogy …
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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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Compartmentalization evaluated to explain discrepancies calculating cartilage fixed charge density
… as a means of measuring cartilage fixed charge density - a known indicator of cartilage condition. Similar calculations of fixed charge density from proton (in the presence of gadopentetate) NMR observations and the same model were highly correlated with, but 50% below, values derived …
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Titanium nitride as an electrode material for high charge density applications
… were studied in this thesis towards improving charge density of electrodes. Titanium nitride (TiN) was sputtered in a custom designed pattern of electrodes with silicon as substrate, at a deposition rate of 2 A /sec. Atomic Force Microscopy (AFM) analysis of TiN film showed a smooth surface for …
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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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Scanning tunneling microscopy of quasi-one-dimensional charge-density wave materials
Restriction data tranferred 2014-07-01T11:19:18-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission
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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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The Experimental Determination of Valence Charge Density in Tetracyanoethyleneoxide by Diffraction Methods
Made available in DSpace on 2014-12-10T23:01:16Z (GMT). No. of bitstreams: 1 7212288.pdf: 4897217 bytes, checksum: aa701933ca3d072cd73421a2abd4fbd0 (MD5) Previous issue date: 1971
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Growth dynamics, charge density, and structure of polyamide thin-film composite membranes
… (MPD) monomer concentrations on the polyamide charge concentration in the near-surface region by X-ray photoelectron spectroscopy (XPS) and in the bulk by RBS; and (3) proposing a technique for measuring polyamide structures using wide-angle X-Ray scattering (WAXS). While developing these …
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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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Emergence of charge density wave domain walls above the superconducting dome in TiSe2
… ordered state, such as antiferromagnetism, charge density wave (CDW), or stripe order. This suggests a fundamental connection between SC and fluctuations in some other order parameter. 1T-TiSe2 is a prototypical CDW material in the transtion-metal dichalcogenide family and was previously …
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