A5111822166- Organic and Molecular Conductors Research
- Magnetism in coordination complexes
- Physics of Superconductivity and Magnetism
- Advanced Chemical Physics Studies
- Molecular Junctions and Nanostructures
- Inorganic Chemistry and Materials
- Solid-state spectroscopy and crystallography
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Optical Network Technologies
- Iron-based superconductors research
- Inorganic Fluorides and Related Compounds
- Fullerene Chemistry and Applications
- Quantum and electron transport phenomena
- Organometallic Compounds Synthesis and Characterization
- Advanced Photonic Communication Systems
- Photonic and Optical Devices
- Chemical Thermodynamics and Molecular Structure
- Rare-earth and actinide compounds
- Advanced Condensed Matter Physics
- Force Microscopy Techniques and Applications
- Catalysis and Oxidation Reactions
- Organometallic Complex Synthesis and Catalysis
- Plant biochemistry and biosynthesis
- Crystal structures of chemical compounds
- Mass Spectrometry Techniques and Applications
Northwestern College - Iowa
2024
OFS (United States)
2016
Optical Fiber Solutions (Denmark)
2011-2014
Institute of Electrical and Electronics Engineers
2013
Technical University of Denmark
2007-2011
University Hospitals Cleveland Medical Center
1964-2009
Danish Geotechnical Society
2008
Lawrence Livermore National Laboratory
2004
University of Oklahoma Health Sciences Center
2000
National Center for Agricultural Utilization Research
1979-1999
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new ambient-pressure organic superconductor, .kappa.-(ET)2Cu[N(CN)2]Br, with the highest transition temperature yet observed (inductive onset Tc = 11.6 K, resistive 12.5 K)Aravinda M. Kini, Urs Geiser, Hau H. Wang, K. Douglas Carlson, Jack Williams, W. Kwok, G. Vandervoort, James E. Thompson, Daniel L. Stupka, and Cite this: Inorg. Chem. 1990, 29, 14, 2555–2557Publication Date (Print):July 1, 1990Publication History Published online1 May...
Recent advances in the design and synthesis of organic synthetic metals have yielded materials that highest superconducting transition temperatures (T(c) approximately 13 kelvin) reported for these systems. These crystal structures consisting alternating layers donor molecules inorganic anions. Organic superconductors various electronic magnetic properties are similar to those copper oxide (which high T(c) values); similarities include highly anisotropic conductivities, critical fields,...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganic superconductors: structural aspects and design of new materialsJack M. Williams, Mark A. Beno, Hau H. Wang, Peter C. W. Leung, Thomas J. Emge, Urs Geiser, K. Douglas CarlsonCite this: Acc. Chem. Res. 1985, 18, 9, 261–267Publication Date (Print):September 1, 1985Publication History Published online1 May 2002Published inissue 1 September 1985https://pubs.acs.org/doi/10.1021/ar00117a001https://doi.org/10.1021/ar00117a001research-articleACS...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAmbient-pressure superconductivity at 2.7 K and higher temperatures in derivatives of (BEDT-TTF)2IBr2: synthesis, structure, detection superconductivityJack M. Williams, Hau H. Wang, Mark A. Beno, Thomas J. Emge, L. Sowa, P. T. Copps, F. Behroozi, N. Hall, K. Douglas Carlson, G. W. CrabtreeCite this: Inorg. Chem. 1984, 23, 24, 3839–3841Publication Date (Print):November 1, 1984Publication History Published online1 May 2002Published inissue 1...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxygen content of superconducting perovskites, lanthanum strontium copper oxide La2-xSrxCuOy and yttrium barium YBa2Cu3OyEvan H. Appelman, Lester R. Morss, Aravinda M. Kini, Urs Geiser, A. Umezawa, G. W. Crabtree, K. Douglas CarlsonCite this: Inorg. Chem. 1987, 26, 20, 3237–3239Publication Date (Print):October 1, 1987Publication History Published online1 May 2002Published inissue 1 October 1987https://doi.org/10.1021/ic00267a003Request reuse...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthetic metals based on bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF): synthesis, structure, and ambient-pressure superconductivity in (BEDT-TTF)2I3Jack M. Williams, T. J. Emge, H. Wang, A. Beno, P. Thomas Copps, L. N. Hall, K. Douglas Carlson, G. W. CrabtreeCite this: Inorg. Chem. 1984, 23, 17, 2558–2560Publication Date (Print):August 1, 1984Publication History Published online1 May 2002Published inissue 1 August...
We report the successful transmission of ten 494.85 Gbit/s DWDM signals on standard 50 GHz ITU-T grid over 32 × 100 km ultra-large-area (ULA) fiber. A net spectral efficiency (SE) 8.25 b/s/Hz was achieved, after excluding 20% soft-decision forward-error-correction (FEC) overhead. Such a result accomplished by use recently proposed polarization-division-multiplexed (PDM) time-domain hybrid 32-64 quadrature-amplitude-modulation (QAM) format, along with improved carrier frequency and phase...
Magnetization measurements at ambient pressure on \ensuremath{\kappa}-(ET${)}_{2}$Cu[N(CN${)}_{2}$]Cl, an organic salt that is superconducting under (${\mathit{T}}_{\mathit{c}}$=12.8 K 0.3 kbar), reveal antiferromagnetic transition near 45 and, for the first time in this class of materials, a 22 to state displaying weak ferromagnetic hysteresis with saturation moment (8\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}4}$)${\mathrm{\ensuremath{\mu}}}_{\mathit{B}}$/formula. This...
The magnetic-field penetration depth \ensuremath{\lambda} in the organic superconductors \ensuremath{\kappa}-(BEDT-TTF${)}_{2}$ Cu(NCS${)}_{2}$ and Cu[N(CN${)}_{2}$]Br has been measured over a wide temperature region 20 mK\ensuremath{\le}T\ensuremath{\le}15 K via muon-spin-relaxation technique. Linear variation of with T at low temperatures, found both systems, is consistent anisotropic superconducting pairings line nodes energy gap. In latter compound, we observe flux depinning...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSuperconductivity at 2.8 K and 1.5 kbar in .kappa.-(BEDT-TTF)2Cu2(CN)3: the first organic superconductor containing a polymeric copper cyanide anionUrs Geiser, Hau H. Wang, K. Douglas Carlson, Jack M. Williams, Henry A. Charlier Jr., James E. Heindl, George Yaconi, Bradley J. Love, Michael W. Lathrop, Cite this: Inorg. Chem. 1991, 30, 12, 2586–2588Publication Date (Print):June 1, 1991Publication History Published online1 May 2002Published inissue 1...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAmbient-pressure superconductivity at the highest temperature (5 K) observed in an organic system: .beta.-(BEDT-TTF)2AuI2Hau H. Wang, Mark A. Beno, Urs Geiser, Millicent Firestone, Kevin S. Webb, L. Nunez, G. W. Crabtree, K. Douglas Carlson, Jack M. Williams, and Cite this: Inorg. Chem. 1985, 24, 16, 2465–2466Publication Date (Print):July 1, 1985Publication History Published online1 May 2002Published inissue 1 July...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe first ambient pressure organic superconductor containing oxygen in the donor molecule, .beta.m-(BEDO-TTF)3Cu2(NCS)3, Tc = 1.06 KMark A. Beno, Hau H. Wang, Aravinda M. Kini, K. Douglas Carlson, Urs Geiser, W. Kwok, James E. Thompson, Jack Williams, Jingqing Ren, and Myung Hwan WhangboCite this: Inorg. Chem. 1990, 29, 9, 1599–1601Publication Date (Print):May 1, 1990Publication History Published online1 May 2002Published inissue 1...
Approximate wavefunctions for the low-lying 1Σ+ state of titanium monoxide molecule have been calculated by method Roothaan at three internuclear distances about minimum potential energy curve. Basis orbitals were chosen to represent principal effects distortion and polarization atomic constituents a very limited set basis orbitals. The calculations yield approximate Hartree—Fock molecular constants binding energies state, 3Δ ground other excited states relative state. An empirical estimate...
This article describes measurements and analysis of the infrared absorption spectra monomer dimer species transition-metal dihalides in region 520–40 cm−1. Experiments have been carried out on MnCl2, FeCl2, CoCl2, NiCl2, NiBr2 isolated argon matrices at 4°K. For monomers, following ν2 bending frequencies (cm−1) observed: 83 (MnCl2), 88 (FeCl2), 94.5 (CoCl2), 85 (NiCl2), 69 (NiBr2). In addition to these, ν3 observed. These data are compatible with a linear structure, but connection other...
Approximate wavefunctions for ScO have been calculated by the method of Roothaan to establish ground-state assignment molecule. Experimental analysis leads a 4Σ ground state, but this has questioned. The with limited basis in matrix Hartree—Fock approximation at three internuclear distances about minimum binding-energy curve. Basis functions Slater type were selected include effects distortion and polarization. Preliminary final calculations every stage computation yielded 2Σ+ state...
The paramagnetic Meissner effect (PME), or Wohlleben effect, in which the field-cooled magnetization of superconducting samples is below ${\mathit{T}}_{\mathit{c}}$, has been reported to occur some a variety high-${\mathit{T}}_{\mathit{c}}$ cuprate superconductors. It proposed that arose granular hole-doped cuprates from current loops with \ensuremath{\pi} phase shifts order parameter at grain-boundary junctions. argued such behavior would be expected d-wave superconductor, but not...
We have performed measurements of the surface impedance in normal and superconducting states title compounds millimeter wave-frequency range (1--3 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$), evaluated complex conductivity for different crystallographic orientations. Above transition temperature, materials behave like metals with a scattering rate approximately 20 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$. In state electrodynamics is good agreement calculations based on BCS ground state:...
We report a determination of the temperature dependence upper critical magnetic fields ${\mathit{H}}_{\mathit{c}2}$ for \ensuremath{\kappa}-(BEDT-TTF${)}_{2}$Cu[N(CN${)}_{2}$]Br, with use dc-magnetization measurements that show well-defined diamagnetic onset. find large slopes -20 T/K and -2.2 H\ensuremath{\parallel}ac H\ensuremath{\parallel}b, respectively, which lead to coherence lengths 37 4 \AA{}. There is unusual structure in possible dimensional crossover at...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-Tc superconductors: selective preparation and characterization of tetragonal orthorhombic (93 K superconductor) phases yttrium barium copper oxide (YBa2Cu3O7-x)Aravinda M. Kini, Urs Geiser, Huey Chuen I. Kao, K. Douglas Carlson, Hau H. Wang, Marilyn R. Monaghan, Jack WilliamsCite this: Inorg. Chem. 1987, 26, 12, 1834–1836Publication Date (Print):June 1, 1987Publication History Published online1 May 2002Published inissue 1 June...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBand electronic structures of the ambient pressure organic superconductors .beta.-(ET)2X (X = I3-, IBr2-)Myung Hwan Whangbo, Jack M. Williams, Peter C. W. Leung, Mark A. Beno, Thomas J. Emge, Hau H. Wang, K. Douglas Carlson, and G. CrabtreeCite this: Am. Chem. Soc. 1985, 107, 20, 5815–5816Publication Date (Print):October 1, 1985Publication History Published online1 May 2002Published inissue 1 October 1985https://doi.org/10.1021/ja00306a047Request...
Abstract Since 1963, production of all epoxy esters has ranged from 60 to 150 million lb annually, a steady 7% the 1 2 billion annual plasticizer production. Growth rates in averaged 4.3% for plasticizers, 3.8% and 5.0% epoxidized soybean oil (ESBO). ESBO accounted 70–76% total ester (1963–1982). The natural liquid Vernonia galamensis seed, with oxirane value (4.1%) viscosity (100 cps) similar some commercial fatty but molecular weight vegetable oils, combines properties both types. Chemical...