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Creator | Title | Description | Subject | Date |
401 |
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Symko, Orest George | Magnetic shielding and relaxation characteristics of superconducting YBa2Cu3O7 tubes | High-7c superconducting tubes have been developed for magnetic shielding of SQUIDs at 77 K. The characteristics of such tubes show that adequate shielding exists for magnetic fields up to a critical field determined by the current density of the tube. Relaxation phenomena with two different time de... | YBa2Cu3O7 tubes; High-Tc; SQUID | 1989 |
402 |
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Mattis, Daniel C. | Magnetic susceptibilities of finite Ising chains in the presence of defect sites | Any antiferromagnet with zero net magnetic moment exhibits limited response to an external homogeneous magnetic field. This changes dramatically in the presence of defect sites, even those that carry no spin. We examine the excess susceptibilities, longitudinal and transverse, due to one or more d... | Antiferromagnets; Defects; Ising chain; Longitudinal field; Transverse field | 2007-12 |
403 |
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Rogachev, Andrey | Magnetic-field dependent differential capacitance of polymer diodes | Using admittance spectroscopy, we found that bipolar organic diodes based on pi-conjugated polymer, 2-methoxy-5-(20-ethylhexyloxy), MEH-PPV, have strong divergent contribution to the device differential capacitance. It is positive at low bias voltages, turns negative at intermediate biases, and beco... | | 2012-01-01 |
404 |
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Rogachev, Andrey | Magnetic-field enhancement of superconductivity in ultranarrow wires | We study the effect of an applied magnetic field on sub-10-nm wide MoGe and Nb superconducting wires. We find that magnetic fields can enhance the critical supercurrent at low temperatures, and do so more strongly for narrower wires. We conjecture that magnetic moments are present, but their pair-... | Ultranarrow wires; Magnetic-field enhancement | 2006-09 |
405 |
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Vardeny, Zeev Valentine | Magnetic-field-dependent carrier injection at La2/3Sr1/3MnO3/ and organic semiconductors interfaces | We have fabricated organic diodes utilizing several ∏-conjugated organic semiconductors (OSEC) as spacer layers between La2=3Sr1=3MnO3 (LSMO) and various metallic electrodes, and measured their magnetoresistance (MR) and magnetoelectroluminescence (MEL) responses. The devices exhibit large negat... | Organic diodes; pi-conjugated organic semicondutors; OSEC; LSMO; MR; Magnetoelectroluminescence; MEL | 2005-07 |
406 |
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Mattis, Daniel C. | Magnetization of Ising model in nonzero magnetic field | Knowing only the zero-field magnetization (e.g., Yang's result) of the Ising model in any number of dimensions, one can construct a lower bound on m(h), the magnetization in finite field. Knowledge of u, the internal energy per bond, enables a more efficient lower bound to be constructed. Both are ... | Magnetization; Griffiths inequality | 1969 |
407 |
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Vardeny, Zeev Valentine | Magneto-optical studies of photoexcitations in C61 | We have used a variety of cw optical and optically detected magnetic-resonance techniques to characterize long-lived photoexeitations in methanofullerene (C6 1) as a dispersion in polystyrene glass, at temperatures below 10 K. We identify triplet excitons with zero-field-splitting (ZFS) parameters... | Photoexcitations; C61; Methanofullerene | 1993-12 |
408 |
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Vardeny, Zeev Valentine | Magnetoconductance response in unipolar and bipolar organic diodes at ultrasmall fields | We measured magnetoconductance (MC) response in a number of unipolar and bipolar organic diodes based on rr-conjugated polymers and small molecules at fields |B|< 100 mT and various bias voltages and temperatures. Similar to magneto-electroluminescence, the MCðBÞ response in bipolar diodes shows a... | | 2010-08 |
409 |
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Wu, Yong-Shi | Manifestations of Berry's topological phase for the photon | Recently, Berry recognized in quantum mechanics a topological phase factor arising from the adiabatic transport of a system around a closed circuit, which is essentially the Aharonov-Bohm effect in parameter space. Here we consider manifestations of this phase factor for a photon in a state of adia... | Aharonov-Bohm effect; Optical fibers; Waveguide | 1986-08 |
410 |
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Williams, Clayton C. | Mapping of mobile charges on insulator surfaces with the electrostatic force microscope | Migration of surface ions in lateral fields on insulator surfaces may modify the electrical characteristics of underlying semiconductor structures causing device instabilities. A high sensitivity electrostatic force microscope is used to image the movement and spatial distribution of surface ions on... | Insulator surfaces; Surface ions; Electrostatic force microscope | 1993 |
411 |
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Dawson, Kyle | Masses of high-redshift clusters via SZ effect observations | We present Sunyaev-Zel'dovich Effect (SZE) observations of distant, highly X-ray luminous clusters of galaxies. We use the SZE data to constrain their total masses, independent of X-ray observations. To do this, we assume the clusters have the same gas mass fraction as that derived from SZE measure... | Sunyaev-Zel'dovich Effect; X-rays; Redshift | 2002 |
412 |
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Wu, Yong-Shi | Massless fermions and Kaluza-Klein theory with torsion | A pure Kaluza-Klein theory contains no massless fermion in four-dimensional theory. We investigate the effect of introducing torsion on the internal manifold and find that there are massless fermions. The hope is that given an isometry group the representation to which these fermions belong is fixe... | Massless fermions; Four-dimensional theory; Torsion | 1984 |
413 |
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Wu, Yong-Shi | Master ward identity for nonlocal symmetries in D = 2 principal chiral models | We derive, in path integral approach, the (anomalous) master Ward identity associated with an infinite set of nonlocal conservation laws in two-dimensional principal chiral models. | | 1997-11 |
414 |
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Wu, Yong-Shi | Matrix compactification on orientifolds | Generalizing previous results for orbifolds, in this paper we describe the compactification of the matrix model on an orientifold which is a quotient space Rd/G as a Yang-Mills theory residing on a quantum space. The information of the compactification is encoded in the action of the discrete symmet... | Spacetime; Orientifolds; Compactification; Quantum space | 1999-06 |
415 |
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Mattis, Daniel C. | Mattis and Pan reply | After several independent calculations failed to confirm our published1 numbers on the ground-state energy of the s = 1/2 antiferromagnet in two dimensions, we checked our computer programs and found some deplorable errors introduced in proceeding from one dimension to two. | Ground-state energy; Antiferromagnets; Long-range order | 1988 |
416 |
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Sokolsky, Pierre | Measurement of elastic νμ and ν̄μ scattering on protons | We have measured elastic vµ and vµ scattering on protons at the Brookhaven National Laboratory Alternating Gradient Synchrotron. We find RNC = σ (νµp → vµp)/σ (vµp -* vµp) = 0.44 ±0.12 and Rvµ = σ (vµp → vµp)/σ (vµn → µ-p) =0.11 ±0.03. The elastic Q2 distribution is in good a... | | 1981-09 |
417 |
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Williams, Clayton C. | Measurement of in-plane magnetization by force microscopy | We present data which show that the magnetic force microscope is capable of detecting the component of the magnetic field parallel to the surface of a sample under study. Images of bits in a Co-alloy thin-film disk and of laser-written bits in a TbFe film were taken with a magnetized tip tilted at ... | Co-alloy disc; Magnetization | 1988 |
418 |
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Sokolsky, Pierre | Measurement of the flux of ultra high energy cosmic rays by the stereo technique | The High Resolution Fly's Eye (HiRes) experiment has measured the flux of ultrahigh energy cosmic rays using the stereoscopic air fluorescence technique. The HiRes experiment consists of two detectors that observe cosmic ray showers via the fluorescence light they emit. HiRes data can be analyzed i... | Ultrahigh energy cosmic rays; Fluorescence; Energy spectrum; GZK cutoff | 2009-08 |
419 |
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Kieda, David B.; Bergman, Douglas R.; Sokolsky, Pierre | Measurement of the flux of ultrahigh energy cosmic rays from monocular observations by the high resolution fly's eye experiment | We have measured the cosmic ray spectrum above 10^172 eV using the two air-fluorescence detectors of the High Resolution Fly's Eye observatory operating in monocular mode.We describe the detector, phototube, and atmospheric calibrations, as well as the analysis techniques for the two detectors.We ... | High Resolution Fly's Eye; Ultrahigh energy cosmic rays | 2004-04 |
420 |
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Sokolsky, Pierre | Measurement of the flux of ultrahigh energy cosmic rays from monocular observations by the High Resolution Fly's Eye experiment | We have measured the cosmic ray spectrum above 1017.2 eV using the two air-fluorescence detectors of the High Resolution Fly's Eye observatory operating in monocular mode.We describe the detector, phototube, and atmospheric calibrations, as well as the analysis techniques for the two detectors.We fi... | Extensive air showers; Fluorescence; Energy spectrum | 2004-04 |
421 |
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Gondolo, Paolo | Measurement of the gluon parton distribution function at small x with neutrino telescopes | We analyze the possibility that neutrino telescopes may provide an experimental determination of the slope λ of the gluon distribution in the proton at momentum fractions x smaller than the accelerator reach. The method is based on a linear relation between λ and the spectral index (slope) of th... | Neutrino telescopes; Charm | 2001-01 |
422 |
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Gerton, Jordan | Measurements of collective collapse in a Bose-Einstein condensate with attractive interactions | The occupation number of a magnetically trapped Bose-Einstein condensate is limited for atoms with attractive interactions. It has been predicted that, as this limit is approached, the condensate will collapse by a collective process. The measured spread in condensate number for samples of 7Li atom... | | 1999-02 |
423 |
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DeTar, Carleton | Measuring the hadronic spectrum of the quark plasma | In an effort to characterize the large-scale structure and composition of the Q C D plasma at zero baryon-number density in the vicinity of the high-temperature phase transition, we have carried out a numerical simulation in SU(3) lattice gauge theory with four flavors of low-mass staggered fermions... | Quark plasma; Gluon plasma; Hadronic matter; Deconfinement; Chiral symmetry; Phase transitions | 1987-11 |
424 |
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Gondolo, Paolo | Measuring the prompt atmospheric neutrino flux with down-going muons in neutrino telescopes | In the TeV energy region and above, the uncertainty in the level of prompt atmospheric neutrinos would limit the search for diffuse astrophysical neutrinos. We suggest that neutrino telescopes may provide an empirical determination of the flux of prompt atmospheric electron and muon neutrinos by mea... | Neutrino telescopes; Prompt flux | 2003-01 |
425 |
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Vardeny, Zeev Valentine | Mechanically stretchable and reversibly deformable liquid metal-based plasmonics | We demonstrate that liquid metals are attractive materials for active plasmonic devices at terahertz frequencies. Using a liquid metal injected into an elastomeric mold, we measure the static and stretched transmission properties of aperture arrays. | | 2012-01-01 |