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Bauer, S. E.,Wright, D. L.,Koch, D.,Lewis, E. R.,McGraw, R.,Chang, L.-S.,Schwartz, S. E.,Ruedy, R. Copernicus GmbH 2008 Atmospheric Chemistry and Physics Vol.8 No.20
<P>Abstract. A new aerosol microphysical module MATRIX, the Multiconfiguration Aerosol TRacker of mIXing state, and its application in the Goddard Institute for Space Studies (GISS) climate model (ModelE) are described. This module, which is based on the quadrature method of moments (QMOM), represents nucleation, condensation, coagulation, internal and external mixing, and cloud-drop activation and provides aerosol particle mass and number concentration and particle size information for up to 16 mixed-mode aerosol populations. Internal and external mixing among aerosol components sulfate, nitrate, ammonium, carbonaceous aerosols, dust and sea-salt particles are represented. The solubility of each aerosol population, which is explicitly calculated based on its soluble and insoluble components, enables calculation of the dependence of cloud drop activation on the microphysical characterization of multiple soluble aerosol populations. A detailed model description and results of box-model simulations of various aerosol population configurations are presented. The box model experiments demonstrate the dependence of cloud activating aerosol number concentration on the aerosol population configuration; comparisons to sectional models are quite favorable. MATRIX is incorporated into the GISS climate model and simulations are carried out primarily to assess its performance/efficiency for global-scale atmospheric model application. Simulation results were compared with aircraft and station measurements of aerosol mass and number concentration and particle size to assess the ability of the new method to yield data suitable for such comparison. The model accurately captures the observed size distributions in the Aitken and accumulation modes up to particle diameter 1 μm, in which sulfate, nitrate, black and organic carbon are predominantly located; however the model underestimates coarse-mode number concentration and size, especially in the marine environment. This is more likely due to oversimplifications of the representation of sea salt emissions - sea salt emissions are only calculated for two size classes - than to inherent limitations of MATRIX. </P>
Heavy flavor properties of jets produced inpp¯interactions ats=1.8TeV
Acosta, D.,Ambrose, D.,Anikeev, K.,Antos, J.,Apollinari, G.,Arisawa, T.,Artikov, A.,Azfar, F.,Azzi-Bacchetta, P.,Bacchetta, N.,Barnes, V. E.,Barnett, B. A.,Barone, M.,Bauer, G.,Bedeschi, F.,Behari, S. American Physical Society 2004 PHYSICAL REVIEW D - Vol.69 No.7
Ni<sub>2</sub>X<sub>2</sub> (X=pnictide, chalcogenide, or B) based superconductors
Ronning, F.,Bauer, E.D.,Park, T.,Kurita, N.,Klimczuk, T.,Movshovich, R.,Sefat, A.S.,Mandrus, D.,Thompson, J.D. Elsevier 2009 Physica. C, Superconductivity Vol.469 No.9
<P>We review the properties of Ni-based superconductors which contain Ni2X2 (X = As, P, Bi, Si, Ge, B) planes, a common structural element found also in the recently discovered FeAs superconductors. Strong evidence for the fully gapped nature of the superconducting state has come from field dependent thermal conductivity results on BaNi2As2. Coupled with the lack of magnetism. the majority of evidence suggests that the Ni-based compounds are conventional elect ron-phonon mediated superconductors. However, the increase in T-c in LaNiAsO with doping is anomalous, and mimics the behavior in LaFeAsO. Furthermore, comparisons of the properties of Ni- and Fe-based systems show many similarities, particularly with regards to structure-property relationships. This suggests a deeper connection between the physics of the FeAs superconductors and the related Ni-based systems which deserves further investigation. (C) 2009 Elsevier B.V. All rights reserved.</P>
Development of the heavy-fermion state inCe2IrIn8and the effects of Ce dilution in(Ce1−xLax)2IrIn8
Ohishi, K.,Heffner, R. H.,Ito, T. U.,Higemoto, W.,Morris, G. D.,Hur, N.,Bauer, E. D.,Sarrao, J. L.,Thompson, J. D.,MacLaughlin, D. E.,Shu, L. American Physical Society 2009 Physical review. B, Condensed matter and materials Vol.80 No.12
The magnetic instability of Yb<sub>2</sub>Pd<sub>2</sub>(In,Sn) in a non-Fermi liquid environment
Bauer, E,Hilscher, G,Michor, H,Paul, Ch,Aoki, Y,Sato, H,Adroja, D T,Park, J-G,Bonville, P,Godart, C,Sereni, J,Giovannini, M,Saccone, A IOP Pub 2005 Journal of physics, an Institute of Physics journa Vol.17 No.11
<P>Various concentrations of the solid solution Yb<SUB>2</SUB>Pd<SUB>2</SUB>In<SUB>1−<I>x</I></SUB>Sn<SUB><I>x</I></SUB> ranging from <I>x</I> = 0 to 1 with the tetragonal Mo<SUB>2</SUB>FeB<SUB>2</SUB>-type structure were prepared and their physical properties were studied by means of bulk and spectroscopic measurements as a function of temperature, pressure and magnetic fields. Results deduced from these studies indicate a slight variation of the valency of the Yb ions, from <img SRC='http://ej.iop.org/images/0953-8984/17/11/032/cm192308ieqn1.gif' ALIGN='MIDDLE' ALT='\nu \approx 2.9 '/> for both border compounds to &ngr; = 3 at <I>x</I> = 0.6. This variation gives rise to the appearance of long range magnetic order in a narrow concentration region around <I>x</I> = 0.6, while both border compounds remain non-magnetic. The outstanding concentration dependence for the ordered regime may be indicative of two quantum critical points, a novel feature not yet observed in Yb compounds. </P>
Cosmology from cosmic shear with Dark Energy Survey Science Verification data
Abbott, T.,Abdalla, F. B.,Allam, S.,Amara, A.,Annis, J.,Armstrong, R.,Bacon, D.,Banerji, M.,Bauer, A. H.,Baxter, E.,Becker, M. R.,Benoit-Lé,vy, A.,Bernstein, R. A.,Bernstein, G. M.,Bertin, E.,Bl American Physical Society 2016 Physical Review D Vol.94 No.2
<P>We present the first constraints on cosmology from the Dark Energy Survey (DES), using weak lensing measurements from the preliminary Science Verification (SV) data. We use 139 square degrees of SV data, which is less than 3% of the full DES survey area. Using cosmic shear 2-point measurements over three redshift bins we find sigma(8)(Omega(m)/0.3)(0.5) = 0.81 +/- 0.06 (68% confidence), after marginalizing over 7 systematics parameters and 3 other cosmological parameters. We examine the robustness of our results to the choice of data vector and systematics assumed, and find them to be stable. About 20% of our error bar comes from marginalizing over shear and photometric redshift calibration uncertainties. The current state-of-the-art cosmic shear measurements from CFHTLenS are mildly discrepant with the cosmological constraints from Planck CMB data; our results are consistent with both data sets. Our uncertainties are similar to 30% larger than those from CFHTLenS when we carry out a comparable analysis of the two data sets, which we attribute largely to the lower number density of our shear catalogue. We investigate constraints on dark energy and find that, with this small fraction of the full survey, the DES SV constraints make negligible impact on the Planck constraints. The moderate disagreement between the CFHTLenS and Planck values of sigma(8)(Omega(m)/0.3)(0.5) is present regardless of the value of w.</P>
Shubnikov-de Haas Oscillation in PuIn3
Yoshinori Haga,Eric D. Bauer,Paul H. Tobash,Jeremy N. Mitchell,Oscar Ayala-Valenzuela,Ross D. McDonald,Charles H. Mielke,Zachary Fisk 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
The Fermi surface of PuIn3 is investigated using flux-grown single crystals. Shubnikov-de Haas(SdH) oscillations were detected by means of the skin-depth measurement using a proximitydetector-oscillator circuit. Angular dependence of the SdH frequency which corresponds to theextremal cross-sectional area of Fermi surface agrees well with the previous magnetic susceptibilitymeasurement using conventional field-modulation method. The SdH oscillation suddenly vanisheswhen the magnetic field is tilted from the cubic [111] direction.
Hg을 도핑한 무거운 페르미온 초전도체 $CeRhIn_5$의 압력에 따른 변화
서순범,주솔,박두선,Seo, S.,Ju, S.,Bauer, E.D.,Thompson, J.D.,Park, T. 한국초전도학회 2012 Progress in superconductivity Vol.14 No.1
The heavy-fermion compound $CeRhIn_5$ is a prototypical antiferromagnet where Ce 4f moments align antiferromagnetically below 3.8 K. When doped with Hg, the antiferromagnetic transition $T_N$ initially decreases, becomes flat, and increases again with further increasing Hg concentration. Here we report pressure effects on the electrical resistivity of a 0.45 % Hg-doped $CeRhIn_5$, where $T_N$ is 3.4 K and the magnetic structure is same as that of the undoped compound with Q=(1/2, 1/2, 0.298). With increasing pressure, $T_N$ is suppressed and a superconducting state emerges. The temperature dependence of the electrical resistivity near an optimal pressure shows a power-law behavior that deviates from a $T^2$ dependence, indicating presence of abundant quantum fluctuations near the optimal pressure.