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Showing 13 to 24 of 372 entries
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Nuclear stopping in Au+Au collisions at square root of S(NN)=200 GeV.

Physical review letters

Bearden IG, Beavis D, Besliu C, Budick B, Bøggild H, Chasman C, Christensen CH, Christiansen P, Cibor J, Debbe R, Enger E, Gaardhøje JJ, Germinario M, Hagel K, Hansen O, Holm A, Holme AK, Ito H, Jipa A, Jundt F, Jørdre JI, Jørgensen CE, Karabowicz R, Kim EJ, Kozik T, Larsen TM, Lee JH, Lee YK, Løvhøiden G, Majka Z, Makeev A, Mikelsen M, Murray M, Natowitz J, Nielsen BS, Norris J, Olchanski K, Ouerdane D, Płaneta R, Rami F, Ristea C, Röhrich D, Samset BH, Sandberg D, Sanders SJ, Scheetz RA, Staszel P, Tveter TS, Videbaek F, Wada R, Yin Z, Zgura IS.
PMID: 15447397
Phys Rev Lett. 2004 Sep 03;93(10):102301. doi: 10.1103/PhysRevLett.93.102301. Epub 2004 Aug 30.

Transverse momentum spectra and rapidity densities, dN/dy, of protons, antiprotons, and net protons (p-p) from central (0%-5%) Au+Au collisions at square root of S(NN)=200 GeV were measured with the BRAHMS experiment within the rapidity range 0

One-dimensional PtO2 at Pt steps: formation and reaction with CO.

Physical review letters

Wang JG, Li WX, Borg M, Gustafson J, Mikkelsen A, Pedersen TM, Lundgren E, Weissenrieder J, Klikovits J, Schmid M, Hammer B, Andersen JN.
PMID: 16384475
Phys Rev Lett. 2005 Dec 16;95(25):256102. doi: 10.1103/PhysRevLett.95.256102. Epub 2005 Dec 15.

Using core-level spectroscopy and density functional theory we show that a one-dimensional (1D) oxide structure forms at the steps of the Pt(332) surface after exposure. The 1D oxide is found to be stable in an oxygen pressure range, where...

Small-number statistics near the clustering transition in a compartmentalized granular gas.

Physical review. E, Statistical, nonlinear, and soft matter physics

Mikkelsen R, van der Weele K, van der Meer D, van Hecke M, Lohse D.
PMID: 15903663
Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Apr;71(4):041302. doi: 10.1103/PhysRevE.71.041302. Epub 2005 Apr 08.

Statistical fluctuations are observed to profoundly influence the clustering behavior of granular material in a vibrated system consisting of two connected compartments. When the number of particles N is sufficiently large ( N approximately 300 is sufficient), the clustering...

Charged meson rapidity distributions in central Au+Au collisions at square root(sNN) = 200 GeV.

Physical review letters

Bearden IG, Beavis D, Besliu C, Budick B, Bøggild H, Chasman C, Christensen CH, Christiansen P, Cibor J, Debbe R, Enger E, Gaardhøje JJ, Germinario M, Hagel K, Hansen O, Holm A, Holme AK, Ito H, Jipa A, Jundt F, Jørdre JI, Jørgensen CE, Karabowicz R, Kim EJ, Kozik T, Larsen TM, Lee JH, Lee YK, Løvhøiden G, Majka Z, Makeev A, Mikelsen M, Murray M, Natowitz J, Nielsen BS, Norris J, Olchanski K, Ouerdane D, Płaneta R, Rami F, Ristea C, Röhrich D, Samset BH, Sandberg D, Sanders SJ, Sheetz RA, Staszel P, Tveter TS, Videaek F, Wada R, Yin Z, Zgura IS.
PMID: 15904216
Phys Rev Lett. 2005 Apr 29;94(16):162301. doi: 10.1103/PhysRevLett.94.162301. Epub 2005 Apr 28.

We have measured rapidity densities dN/dy of pi+/- and K+/- over a broad rapidity range (-0.1 < y < 3.5) for central Au + Au collisions at square root(sNN) = 200 GeV. These data have significant implications for the...

Picosecond coherent optical manipulation of a single electron spin in a quantum dot.

Science (New York, N.Y.)

Berezovsky J, Mikkelsen MH, Stoltz NG, Coldren LA, Awschalom DD.
PMID: 18420929
Science. 2008 Apr 18;320(5874):349-52. doi: 10.1126/science.1154798.

Most schemes for quantum information processing require fast single-qubit operations. For spin-based qubits, this involves performing arbitrary coherent rotations of the spin state on time scales much faster than the spin coherence time. By applying off-resonant, picosecond-scale optical pulses,...

Low temperature Ga surface diffusion from focused ion beam milled grooves.

Nanotechnology

Mikkelsen A, Hilner E, Andersen JN, Ghatnekar-Nilsson S, Montelius L, Zakharov AA.
PMID: 19620748
Nanotechnology. 2009 Aug 12;20(32):325304. doi: 10.1088/0957-4484/20/32/325304. Epub 2009 Jul 21.

Ga diffusion from focused ion beam (FIB) milled grooves has been studied using x-ray photoemission electron microscopy (XPEEM) and mirror electron microscopy (MEM). We analyze the surface chemistry of the FIB structures measuring the Ga presence in the top...

Zero-field optical manipulation of magnetic ions in semiconductors.

Nature materials

Myers RC, Mikkelsen MH, Tang JM, Gossard AC, Flatté ME, Awschalom DD.
PMID: 18278049
Nat Mater. 2008 Mar;7(3):203-8. doi: 10.1038/nmat2123. Epub 2008 Feb 17.

Controlling and monitoring individual spins is desirable for building spin-based devices, as well as implementing quantum information processing schemes. As with trapped ions in cold gases, magnetic ions trapped on a semiconductor lattice have uniform properties and relatively long...

Analysis of job strain effects.

Occupational and environmental medicine

Mikkelsen S, Bonde JP, Andersen JH.
PMID: 21715440
Occup Environ Med. 2011 Oct;68(10):786. doi: 10.1136/oemed-2011-100203. Epub 2011 Jun 29.

No abstract available.

The Rh(100)-(3 × 1)-2O structure.

Journal of physics. Condensed matter : an Institute of Physics journal

Gustafson J, Lundgren E, Mikkelsen A, Borg M, Klikovits J, Schmid M, Varga P, Andersen JN.
PMID: 22565149
J Phys Condens Matter. 2012 Jun 06;24(22):225006. doi: 10.1088/0953-8984/24/22/225006. Epub 2012 May 08.

The O adsorption on Rh(100) has been studied using high resolution core level spectroscopy, low energy electron diffraction and scanning tunnelling microscopy. In addition to the well known (2 × 2), (2 × 2)-pg and c(8 × 2) structures...

Strong Schottky barrier reduction at Au-catalyst/GaAs-nanowire interfaces by electric dipole formation and Fermi-level unpinning.

Nature communications

Suyatin DB, Jain V, Nebol'sin VA, Trägårdh J, Messing ME, Wagner JB, Persson O, Timm R, Mikkelsen A, Maximov I, Samuelson L, Pettersson H.
PMID: 24488034
Nat Commun. 2014;5:3221. doi: 10.1038/ncomms4221.

Nanoscale contacts between metals and semiconductors are critical for further downscaling of electronic and optoelectronic devices. However, realizing nanocontacts poses significant challenges since conventional approaches to achieve ohmic contacts through Schottky barrier suppression are often inadequate. Here we report...

Direct imaging of atomic scale structure and electronic properties of GaAs wurtzite and zinc blende nanowire surfaces.

Nano letters

Hjort M, Lehmann S, Knutsson J, Timm R, Jacobsson D, Lundgren E, Dick KA, Mikkelsen A.
PMID: 23941328
Nano Lett. 2013 Sep 11;13(9):4492-8. doi: 10.1021/nl402424x. Epub 2013 Aug 15.

Using scanning tunneling microscopy and spectroscopy we study the atomic scale geometry and electronic structure of GaAs nanowires exhibiting controlled axial stacking of wurtzite (Wz) and zinc blende (Zb) crystal segments. We find that the nonpolar low-index surfaces {110},...

Electroformation of Janus and patchy capsules.

Nature communications

Rozynek Z, Mikkelsen A, Dommersnes P, Fossum JO.
PMID: 24853057
Nat Commun. 2014 May 23;5:3945. doi: 10.1038/ncomms4945.

Janus and patchy particles have designed heterogeneous surfaces that consist of two or several patches with different materials properties. These particles are emerging as building blocks for a new class of soft matter and functional materials. Here we introduce...

Showing 13 to 24 of 372 entries