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Showing 1 to 20 of 68 for “"incommensurate"”.
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Incommensurate crystal optics
Contains fulltext : mmubn000001_121504395.pdf (Publisher’s version ) (Open Access)
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Optical and morphological aspects of incommensurate crystals
Contains fulltext : mmubn000001_19834032x.pdf (Publisher’s version ) (Open Access)
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An Nmr Test of Mcmillan's Theory of Incommensurate Charge Density Waves
… hypothesis of ""discommensuration""--that the incommensurate CDW is best described by commensurate regions separated by regions of phase slip."
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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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Structure-property relationships and phase stability in the tin-modified lead zirconate titanate crystalline solution series
… were done as a function of titanium content. An incommensurate phase was observed across much of the compositional range and was defined by the appearance of superlattice reflections along the $$ direction which were not rational multiples of the fundamental periodicity along that direction. The …
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Effects of fractional time derivatives in predator-prey models
… each species. This system is referred to as an incommensurate system. We will explain how the different fractional orders affect the stability of this model. Then, in order to see if this change in stability is a more general result, we will consider a plant-herbivore incommensurate system and …
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Elastic and inelastic X-ray scattering studies of the low dimensional spin-1/2 quantum magnet TiOCl
… 65 K and 92 K is characterized by a novel incommensurate state. The incommensurate reflections appear at ( ... ). The temperature dependence of the intensity of the incommensurate peaks shows a more gradual onset, with no thermal hysteresis. The incommensurate wavevectors change …
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Rhetorical Perspectivism: an Epistemologically Meaningful Response to Incommensurability
… conflicting knowledge claims are considered incommensurate conflicts. This study is designed to investigate the relationship between communication and knowledge and suggest an epistemologically meaningful response to incommensurability. Rhetorical perspectivism is reviewed as a theory of …
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Nuclear Forward-Scattering of Synchrotron Radiation From Krypton: First Observation and Application to the Study of Lattice Dynamics in Near-Monolayer Krypton-on-Graphite
… at low temperatures through the commensurate-incommensurate transition of Kr-on-graphite shows a dramatic decrease and slow recovery in the transition region. This behavior is shown to be consistent with a simple calculation of the interaction energy of the incommensurate layer.</p> <p>The …
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High-pressure states of bismuth
… interpenetrate, but the lattice parameters are incommensurate. This crystal thus lacks a single unit cell - an unexpected complexity for a simple element. The discovery of such unusual structures in elements is a new phenomenon and their physical properties are rather unexplored. We present …
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Investigation of Frustrated Quasi-One-Dimensional Quantum Spin-Chain Materials
… antiferromagnetically below TN = 1.8 K with an incommensurate helicoidal magnetic structure. CuSb2O4 is characterized by ferromagnetic nearest-neighbour and antiferromagnetic next-nearest-neighbour spin-exchange interactions with Jnn/Jnnn = -1.8. A (H, T) magnetic phase diagram was constructed …
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Angle-resolved photoemission studies of quantum-electronic coherence in metallic thin-film systems
… than the photoemission escape depth and an incommensurate Ag/Pb interface. The simulations presented quantify the coherent coupling of the Ag and Pb electronic structures, affording a useful and non-invasive means for accessing deeply buried structures. This demonstrated exploitation of …
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Inelastic light scattering studies of quantum phase transitions in CuxTiSe2 and multiferroic TbMnO3
… caused, by a magnetic phase transition from an incommensurate spiral magnetic arrangement of the Mn3+ ions to a commensurate magnetic phase as a function of applied field. We use Raman scattering to carefully probe this magnetic-field-tuned phase transition in microscopic detail. Our measurements …
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Phase diagram for the S equals one-half and J equals three-halves Kondo lattice model
… wave ordering of both commensurate and incommensurate varieties. In S=1/2, the magnetic phase exhibits a spike in critical temperature at half-filling. In J=3/2, the Kondo phase is reentrant at weaker coupling but not at stronger coupling.
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Studies of Topology and Order in Frustrated Spin Systems
… (b) we identify a possible mechanism of how incommensurate ordering can emerge in strongly correlated systems and show explicitly how it works in toy models of quantum frustration, such as quantum dimer models, (c) we study the quantum entanglement entropy of different topological phases in …
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Raman Scattering From the Superconductor Niobium-Diselenide
At 33 K 2H-NbSe(,2) distorts into an incommensurate charge density wave (CDW) state. The Raman spectrum shows amplitude modes of A and E symmetry near 40 cm('-1) induced by the CDW. At 7 K this material becomes superconducting, and at 2 K we observe additional Raman peaks near 20 cm('-1), one each …
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Generation du feu or incommensurable interpretations? A study of officer enlisted man relations in the French army during the First World War.
… hierarchy was reproduced in the ranks, producing incommensurate experiences that served to maintain a gulf between officers and enlisted men. At the same time, French Third Republican culture inculcated a sense of service and duty to the state. With these factors in mind, we may ask the question …
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X-ray and neutron scattering studies of the Rb₂MnF₄ and Cu₁âõxMgx̳GeO₃ in an external magnetic field
… x-ray scattering measurements of the high-field incommensurate phase in doped CuGeO3. Random-field behavior, including Lorentzian-squared lineshapes, the changing of a first order transition to second-order, and critical destruction of long-range order is observed in this continuous order …
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Emergence of charge density wave domain walls above the superconducting dome in TiSe2
… at P = 3 GPa we observed a weakly first order, incommensurate CDW phase, suggesting the presence of a Lifshitz tricritical point somewhere above the superconducting dome. Our study suggests that SC in 1T-TiSe2 may not be directly connected to the QCP of the CDW order, but to the formation of CDW …
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The magnetic properties of the cuprate superconductors
… spin susceptibility that has correlations incommensurate with the lattice as measured in neutron scattering experiments is found to be in conflict with the measured nuclear magnetic relaxation rates. The author reports on calculations of the electron spin susceptibility for the …
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