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21. Spin-transfer dynamics in spin valves with out-of-plane magnetized CoNi free layers
Topic: Condensed Matter Physics
Published: 1/29/2010
Authors: William H Rippard, Alina M Deac, Matthew R Pufall, Justin M Shaw, Mark W Keller, Stephen E Russek, Gerrit E Bauer, Claudio Serpico
Abstract: We have measured spin-transfer-induced dynamics in magnetic nanocontact devices having a perpendicularly magnetized Co/Ni free layer and an in-plane magnetized CoFe fixed layer. The frequencies and powers of the excitations agree well with the predic ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903981

22. Effects of magnetism and electric field on the energy gap of bilayer graphene nanoflakes
Topic: Condensed Matter Physics
Published: 1/13/2010
Author: Hongki Min
Abstract: We study the effect of magnetism and perpendicular external electric field strengths on the energy gap of length confined bilayer graphene nanoribbons (or nanobars) using a first principles density functional electronic structure method and a semi-lo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903804

23. Electrical Characterization of Soluble Anthradithiophene Derivatives
Topic: Condensed Matter Physics
Published: 11/19/2009
Authors: Brad Conrad, Calvin Chan, Marsha A. Loth, John E Anthony, David J Gundlach
Abstract: Organic semiconductors remain an active subject for device physics and material science because of their varied electrical properties and potential for low-cost, high-throughput roll-to-roll processing. Several high-mobility oligomers, such as pen ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905388

24. Origin of Universal Optical Conductivity and Optical Stacking Sequence Identification in Multilayer Graphene
Topic: Condensed Matter Physics
Published: 8/6/2009
Authors: Hongki Min, Allan H. MacDonald
Abstract: We predict that the optical conductivity of normal graphene multilayers is close to {sigma}^duni^=({pi}/2) e^u2^/h per layer over a broad range of frequencies. The origin of this behavior is an emergent chiral symmetry which is present in normal N-l ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902107

25. The-Final-State Symmetry of Na 1s Core-shell Excitons in NaCl and NaF
Topic: Condensed Matter Physics
Published: 7/8/2009
Authors: Eric L Shirley, K. P. Nagle, G T Seidler, T. T. Fister, J. A. Bradley, F. C. Brown
Abstract: We report measurements of the Na 1s contribution to the nonresonant inelastic x-ray scattering (NRIXS) from NaCl and NaF. Prior x-ray absorption studies have observed two pre-edge excitons in both materials. The momentum transfer-dependence (q-depe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901581

26. Josephson phase qubit circuit for the evaluation of advanced tunnel barrier materials
Topic: Condensed Matter Physics
Published: 11/21/2008
Authors: Jeffrey S. Kline, Haohua Wang, Seongshik Oh, John M Martinis, David P Pappas
Abstract: We have found that crystalline Josephson junctions have critical current density control problems which decrease circuit yield. We present a qubit circuit designed to accommodate a factor-of-five variation in critical current density for the evaluati ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33165

27. Ultra-high resolution alpha particle spectroscopy using calorimetry
Topic: Condensed Matter Physics
Published: 9/23/2008
Authors: Robert Daniel Horansky, Joel Nathan Ullom, James A Beall, Gene C Hilton, Kent D Irwin, Don Dry, Beth Hastings, Stephen Lamont, Clifford R Rudy, Michael W Rabin
Abstract: Calorimetry has been used since the late 1700?s to measure the heat output of physical processes ranging from chemical reactions to the respiration of organisms . Calorimetry is performed by measuring the temperature change caused by heat release int ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32940

28. Shear Thinning Near the Critical Point of Xenon
Topic: Condensed Matter Physics
Published: 4/17/2008
Authors: Robert F Berg, Michael R Moldover, M Yao, G A Zimmerli
Abstract: We measured shear thinning, a viscosity decrease ordinarily associated with complex liquids, near the critical point of xenon. The data span the range of reduced shear rates: 0.001 < {gamma}{tau} < 700, where {gamma}{tau} is the shear rate scal ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830987

29. Temperature-Dependent Behavior of PbSc^d1/2^Nb^d1/2^O^d3^ From First Principles
Topic: Condensed Matter Physics
Published: 7/1/2001
Authors: Eric J Cockayne, Benjamin P Burton, L Bellaiche
Abstract: We study the ferroelectric phase transition in PbSc1/2Nb1/2O3 (PSN) using a first-principles effective Hamiltonian approach. Results for PSN with NaCl-type ordering of Sc and Nb on the B sites shows that a Pb-centered effective Hamiltonian is approp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850498

30. Observations and modeling of normal-metal/insulator/superconductor refrigerator cooling from 300 mK to below 100 mK
Topic: Condensed Matter Physics
Published: Date unknown
Authors: Galen C O'Neil, Peter J Lowell, Joel Nathan Ullom, Jason M Underwood
Abstract: In a refrigerator, heat is moved from one system to another and this movement requires an additional dissipated power. It is desirable to both isolate the cooled system, so that its temperature may differ from the bath, and to heatsink the heated sys ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909267



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