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Showing 1 to 9 of 9 for “"superconducting energy gap"”.
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Effects of anisotropy of the superconducting energy gap
Various effects of anisotropy of the superconducting energy gap are theoretically considered. In order to estimate the effects of anisotropy upon the thermodynamic properties of pure, single-crystal superconductors, a factorable BCSlike model for the effective electron-electron matrix element Vp p …
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Using Phonon Imaging to Probe Anisotropy in the Superconducting energy Gap of Lead
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-11-14T18:20:59Z No. of bitstreams: 1 Short_Jonathan.pdf: 7409344 bytes, checksum: 92684f5b5180376dd3bbfabec50d734b (MD5)
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Probing the Superconducting Gap of Lead With Ballistic Phonons
… we extract consistent values of both the superconducting energy gap parameter and the superconducting phonon absorption coefficient for all phonon-imaging data. Measured values of the energy gap (Delta = 1.32+/-0.07 meV)are consistent with accepted values from tunneling measurements. …
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Anisotropy effects in the critical field of superconducting tin-indium alloys
… the critical-field curve, Hc versus T, for eight superconducting dilute alloys of indium in tin near the critical temperature and at low temperatures extending to about 0.30 K. The effective magnitude of the superconducting energy gap is sensitive to the direction of the electron momentum relative …
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Investigations of Crossed Andreev Reflection in Hybrid Superconductor-Ferromagnet Structures
… wires placed at a distance less than the superconducting coherence length. This thesis searches for signatures of this process, called crossed Andreev reflection (CAR), in three device geometries. The first devices studied are lateral spin valves. In these structures, when electrons with …
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Low temperature anomalies in niobium, vanadium and tantalum
The specific heats of superconducting Nb, V and Ta and of normal Ta have been measured in the temperature range 0.05 - 2 K in an outgassed condition and with H or D added as interstitial solutes. The presence of H or D in these bcc transition metals produces an isotope dependent specific heat …
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Far infrared reflectance and optical properties of organic superconductor (TMTSF)2ClO4 /
… near 24 K, and the sample is expected to be superconducting below 1.2 K, while fast cooling yields an insulating state at low temperatures. Upon the slow cooling the reflectance shows dependence with temperature and exhibits the 28 cm- 1 feature reported previously [1]. Thermoreflectance for …
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MICROWAVE STUDY OF THE PROPERTIES OF UNCONVENTIONAL SUPERCONDUCTING SYSTEMS
… used to characterize properties of conventional superconducting systems. Examples include characterizing the magnetic penetration depth of bulk crystals and thin films, residual resistance of superconducting radio-frequency cavity systems for use in particle accelerators, and resonance properties …
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Imaging topological superconductivity in UTe_2
… has ignited a new wave of interest in p-wave superconducting states as it offers the exciting prospect of measuring unusual surface electronic states, such as zero-energy Andreev bound states, and helical or chiral topological surface states. The latter state being a prerequisite for …