Výsledky vyhledávání - "Holmes Alexander T."

Akademický článek

Polarisation Development at the European Spallation Source

Publikováno v: EPJ Web of Conferences, Vol 286, p 03004 (2023)

To meet the ever-increasing user demand, eleven of the fifteen European Spallation Source (ESS) instruments under construction aim to offer polarised neutrons for user experiments. They include an imaging instrument, a SANS instruments, two reflectom

Externí odkaz: https://doaj.org/article/b0482c2b012e4f4f930afdce4b1e6c29

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Influence of the Fermi Surface Morphology on the Magnetic Field-Driven Vortex Lattice Structure Transitions in YBa$_{2}$Cu$_{3}$O$_{7-\delta}:\delta=$0, 0.15

Autor: Leos, Nikola Galvan, White, Jonathan S., Lim, Joshua A., Gavilano, Jorge L., Delley, Bernard, Lemberger, Louis, Holmes, Alexander T., Medarde, Marisa, Loew, Toshinao, Hinkov, Vladimir, Lin, Chengtian, Laver, Mark, Dewhurst, Charles D., Forgan, Edward M.

Publikováno v: J. Phys. Soc. Jpn. 84, 044709 (2015)

We report small-angle neutron scattering measurements of the vortex lattice (VL) structure in single crystals of the lightly underdoped cuprate superconductor YBa2Cu3O6.85. At 2 K, and for fields of up to 16 T applied parallel to the crystal c-axis,

Externí odkaz: http://arxiv.org/abs/1503.04042

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A Simple Bayesian Method for Improved Analysis of Quasi-2D Scattering Data

Autor: Holmes, Alexander T.

Publikováno v: Phys. Rev. B 90, 024514 (2014)

A new method is presented for the analysis of small angle neutron scattering data from quasi-2D systems such as flux lattices, Skyrmion lattices, and aligned liquid crystals. A significant increase in signal to noise ratio, and a natural application

Externí odkaz: http://arxiv.org/abs/1404.0833

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A 17 T horizontal field cryomagnet with rapid sample change designed for beamline use

Autor: Holmes, Alexander T., Walsh, Gary, Blackburn, Elizabeth, Forgan, Edward M., Savey-Bennett, Marc

We describe a new 17 T cryomagnet for neutron, x-ray or optical experiments with rapid in-situ sample change. Sample temperatures are controllable from < 2 K to 300 K in vacuum. Alternatively a room temperature bore insert can be used for experiments

Externí odkaz: http://arxiv.org/abs/1108.5913

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Valence Instability and Superconductivity in Heavy Fermion Systems

Autor: Holmes, Alexander T., Jaccard, Didier, Miyake, Kazumasa

Many cerium-based heavy fermion (HF) compounds have pressure-temperature phase diagrams in which a superconducting region extends far from a magnetic quantum critical point. In at least two compounds, CeCu2Si2 and CeCu2Ge2, an enhancement of the supe

Externí odkaz: http://arxiv.org/abs/cond-mat/0611429

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Valence fluctuation mediated superconductivity in CeCu2Si2

Autor: Holmes, Alexander T., Jaccard, Didier

It has been proposed that there are two types of superconductivity in CeCu2Si2, mediated by spin fluctuations at ambient pressure, and by critical valence fluctuations around a charge instability at a pressure P_v \simeq 4.5 GPa. We present in detail

Externí odkaz: http://arxiv.org/abs/cond-mat/0509787

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Spin and Valence-Fluctuation Mediated Superconductivity in Pressurized Fe and CeCu2(Si/Ge)2

Autor: Jaccard, D., Holmes, Alexander T.

We review the evidence supporting valence-fluctuation mediated superconductivity in CeCu2Si2 and CeCu2Ge2, where Tc reaches 2.4 K at high pressure. In these systems the valence and magnetic critical points, at p_V and p_c respectively, are well separ

Externí odkaz: http://arxiv.org/abs/cond-mat/0410143

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