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Showing 1 to 20 of 79 for “"Charge density wave"”.
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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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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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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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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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Charge density wave incommensuration in tise2 systems measured with hard x-ray scattering
… phases that order around it. Characterizing the charge order in modulated superconductors provides essential information that could reveal a common underlying mechanism. We performed low temperature experiments on 1T-TiSe 2 crystals tuned by three parameters: pressure, copper intercalation, and …
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Light scattering studies of magnetostructural phases in Mn3O4 and charge density wave melting in ZrTe3
… Mn3O4, as well as the pressure-induced charge-ordered to superconducting transition in ZrTe3. In Mn3O4, I examine the differences in magnetic and structural order between two distinct orthorhombic phases which are descended from the paramagnetic tetragonal phase. These two orthorhombic …
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Synthesis of 1T-Tantalum (IV) Sulfide and observation of charge density wave using scanning tunneling microscopy
… A particular example is the existence of a charge density wave (CDW) in 1T-Tantalum (IV) Sulfide (1T-TaS2). A member of the transition metal dichalcogenide (TMDC) family, 1T-TaS2 exhibit a periodic modulation of electronic charge density. Unlike bulk semiconductor or metals, lattice …
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The Premartensitic Transitions of Titanium Nickel: Observation of a Charge Density Wave in a Binary Alloy
The appearance of a charge-density wave (CDW) and associated phase transitions has been identified in TiNi(Fe), a binary alloy. Bulk thermal and transport measurements have revealed that the "pre-martensitic instability" is composed of two distinct phase transitions. In TiNi(3.2% Fe), these occur …
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The Premartensitic Transitions of Titanium Nickel: Observation of a Charge Density Wave in a Binary Alloy
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2011-06-08T18:25:00Z No. of bitstreams: 1 1981_meichle.pdf: 5427373 bytes, checksum: e5297eaac99a6c38e92d60ee6827498e (MD5)
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Design of Resistivity Instrumentation for a He3 Cryostat and its Application to the Charge Density Wave Superconductor CuxTiSe2
Fermi patches in quasi-two dimensional charge density waves (CDW) have not described the connection to superconductivity (SC) according to theory adequately at this point in time. The connection between CDW and SC in the quasi-two dimensional material CuxTiSe2 is an interesting one which might …
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An X-ray study of charge-density-wave pinning and a measurement of the thermal conductivity in blue bronze
Two different aspects of the charge-density-wave (CDW) state were studied in the quasi-onedimensional metal blue bronze (Ko.3oMo03). In the primary experiment reported in this thesis, pinning of the CDW phase by lattice imperfections was examined. Pinning determines most of the dynamics of CDW …
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Elucidation of Charge Density Wave Stability and Defect Interactions in the Highly-Ordered Structural Transition Metal Dichalcogenide System 1T-TaS2
… disulfide (1T-TaS2) has a rich and complex charge density wave (CDW) phase character that has been broadly studied. CDWs are a highly correlated state between electron density and lattice distortion, originally predicted to only exist in one dimension. The discovery of CDWs in …
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Discovery of a Pseudogap Attributed to Charge Density Wave Order at the β-β′ Phase Transition in As2Te3 and the Influence of Cu and Ge Doping on its Properties
… β-As2Te3 to β'-As2Te3 phase transition is due to charge density wave order. This charge density wave transition is observed to be tunable with both Ge and Cu doping, with evidence indicating that the increase in the number of charge carriers due to doping drives the transition temperature lower …
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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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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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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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A Correlated 1-D Monatomic Condensed Matter System: Experiment and Theory
… demonstrates that this 1-D system undergoes a charge density wave instability, which is a first for such a 1-D phenomenon on a metallic substrate. It is determined experimentally that this 1-D system undergoes an electronic phase transition at a temperature of about 85K, in which the higher …
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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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