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Showing 1 to 14 of 14 for “"QCP"”.
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Development of High-Pressure Calorimetry Techniques and Calorimetry Study of the Heavy-Fermion Superconductor CeSb2
… magnetic transition to a quantum critical point (QCP) and the material becomes an unconventional superconductor. Applying the new calorimetry technique, we discover two magnetic transitions in this phase. We track these transitions as further pressure pushes them together and towards the QCP. The …
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Emergence of charge density wave domain walls above the superconducting dome in TiSe2
… the existence of a quantum critical point (QCP) at $P_c = 5.1 +- 0.2 GPa, which is more than 1 GPa beyond the end of the SC region. Unexpectedly, at P = 3 GPa we observed a weakly first order, incommensurate CDW phase, suggesting the presence of a Lifshitz tricritical point somewhere above …
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Quantum simulations on square and triangular Hubbard models
… results show there is a quantum critical point (QCP) beneath the superconducting dome. The QCP is a zero-temperature instability which separates the Fermi liquid and pseudogap regions and exhibits the quantum _x001D_fluctuations which may lead to a high superconducting transition temperature. …
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Brain-Computer Interface Fatigue in Children: Mechanisms and Impact
… such as quadriplegic cerebral palsy (QCP), are often unable to exercise such autonomy. Brain-computer interface (BCI) technology offer children with QCP unique opportunities for communication, environmental exploration, learning, and play. BCI research is rapidly developing but has …
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Dynamics on and of Complex Networks
… called the \emph{quadratic contact process} (QCP) involves ``birth'' and ``death'' events on a static network. </p><p>Vertices take on the binary states occupied(1) or vacant(0). </p><p>We consider two versions of the model -- Vertex QCP, and Edge QCP, corresponding to </p><p>birth events …
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Transport and thermodynamic studies of the superconductors A3T4Sn13 and YFe2Ge2
… in proximity to quantum critical points (QCPs) experience strong fluctuations 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 …
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Insulator-Superconductor Transitions in Two Dimensions
… conductivity near the quantum critical point (QCP) in the presence of dissipation. We show that sufficiently close to the QCP, Ohmic dissipation can change the dynamical critical exponent from z = 1 to z = 2 in the quantum critical (QC) regime. In the third part we show that the regularization …
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Strongly correlated electron behavior in transition metal intermetallics: enhanced thermoelectricity and quantum criticality in FeGa₃ and superconductivity in NiBi₃
… Such a model provides a novel mechanism for a FM-QCP. We also show evidence for a magnetic field-induced critical point in FeGa3. The Ge-doped sample with x = 0.05 is a paramagnetic metal, which shows typical FL behavior at low temperature. However, NFL behavior is observed with applying magnetic …
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Quantum liquid crystal phases and unconventional magnetism in electronic and atomic fermi systems
… studied. Close to the quantum critical point (QCP), the spectrum of fluctuations of the nematic phase has low-energy fluctuating stripes. I study the quantum critical behavior and find evidence that, contrary to the classical case, the gauge-type of coupling between the nematic and smectic is …
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Correlated low temperature states of YFe2Ge2 and pressure metallised NiS2
… to an antiferromagnetic quantum critical point (QCP). Existence of the latter is also indicated by the non-Fermi liquid T$^{3/2}$ behaviour of the low temperature resistivity. Below 1.8 K a superconducting phase develops in the material, making it a rare case of a non-pnictide and …
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Development and exploration of potential routes of discovery of new superconductors
… of searching for quantum critical points (QCPs) and possible superconductors by suppressing ferromagnetic states via chemical substitution and the application of pressure. The ferromagnetism in La(V<sub>>x<sub>Cr<sub>1-x<sub>)Ge<sub>3<sub> was successfully suppressed</p> <p>by pressure, …
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Model-based planning through constraint and causal order decomposition
… plan called a qualitative control plan (QCP) that provides additional execution robustness through temporal flexibility. We demonstrate the decomposed approach to Model-based planning on a scenario based on the ongoing Autonomous Sciencecraft Experiment, onboard EO-1 spacecraft. The EO-1 …
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Field-induced magnetic phase transitions and correlated electronic states in the hexagonal RAgGe and RPtIn series
… a magnetic field-induced quantum critical point QCP. In the former compound, a non-Fermi liquid-like NFL regime is apparent at intermediate fields, but such a behavior is more ambiguous in the YbPtIn. However, a small Pt-deficiency in flux-grown YbPt0.98In single crystals seems to stabilize, …
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Quantum electronic liquid crystals
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-23T19:39:33Z No. of bitstreams: 1 Lawler_Michael.pdf: 904294 bytes, checksum: 70bd50160bc3ec456d63a22b6083297a (MD5)