Search Results - (Author, Cooperation:D. C. Ralph)
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1Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2018-03-06Publisher: American Physical Society (APS)Print ISSN: 0031-9007Electronic ISSN: 1079-7114Topics: PhysicsKeywords: Condensed Matter: Electronic Properties, etc.Published by: -
2Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2018-10-04Publisher: American Physical Society (APS)Print ISSN: 1098-0121Electronic ISSN: 1095-3795Topics: PhysicsKeywords: MagnetismPublished by: -
3Latest Papers from Table of Contents or Articles in PressA. R. Mellnik ; J. S. Lee ; A. Richardella ; J. L. Grab ; P. J. Mintun ; M. H. Fischer ; A. Vaezi ; A. Manchon ; E. A. Kim ; N. Samarth ; D. C. Ralph
Nature Publishing Group (NPG)
Published 2014Staff ViewPublication Date: 2014-07-25Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsPublished by: -
4Latest Papers from Table of Contents or Articles in PressL. Liu ; C. F. Pai ; Y. Li ; H. W. Tseng ; D. C. Ralph ; R. A. Buhrman
American Association for the Advancement of Science (AAAS)
Published 2012Staff ViewPublication Date: 2012-05-05Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
5Latest Papers from Table of Contents or Articles in PressJ. T. Heron ; J. L. Bosse ; Q. He ; Y. Gao ; M. Trassin ; L. Ye ; J. D. Clarkson ; C. Wang ; J. Liu ; S. Salahuddin ; D. C. Ralph ; D. G. Schlom ; J. Iniguez ; B. D. Huey ; R. Ramesh
Nature Publishing Group (NPG)
Published 2014Staff ViewPublication Date: 2014-12-19Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsPublished by: -
6Latest Papers from Table of Contents or Articles in PressStaff View
Publication Date: 2011-06-10Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsPublished by: -
7Articles: DFG German National LicensesStaff View
ISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: We present measurements demonstrating current-induced magnetic domain switching, and also other magnetic excitations, in point-contact devices containing alternating ferromagnetic (F) and noble metal (N) layers, for perpendicular currents ∼109 A/cm2. For F/N/F trilayers in which one F layer is much thinner than the other, we can controllably switch the magnetic moments in the two F layers parallel with a current bias of one sign, and switch them antiparallel with a reversed current. For thicker magnetic films, and for thin films in the presence of a saturating magnetic field, we observe nonhysteretic current-induced changes in resistance, which can be understood as current-induced spin-wave excitations. These observations are in agreement with a model of current-induced magnetic reorientations caused by local exchange forces between conduction electrons and the magnetic moments. © 2000 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesJohnson, K. S. ; Berggren, K. K. ; Black, A. ; Black, C. T. ; Chu, A. P. ; Dekker, N. H. ; Ralph, D. C. ; Thywissen, J. H. ; Younkin, R. ; Tinkham, M. ; Prentiss, M. ; Whitesides, G. M.
Woodbury, NY : American Institute of Physics (AIP)
Published 1996Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: This letter describes the fabrication of ∼80 nm structures in silicon, silicon dioxide, and gold substrates by exposing the substrates to a beam of metastable argon atoms in the presence of dilute vapors of trimethylpentaphenyltrisiloxane, the dominant constituent of diffusion pump oil used in these experiments. The atoms release their internal energy upon contacting the siloxanes physisorbed on the surface of the substrate, and this release causes the formation of a carbon-based resist. The atomic beam was patterned by a silicon nitride membrane, and the pattern formed in the resist material was transferred to the substrates by chemical etching. Simultaneous exposure of large areas (44 cm2) was also demonstrated. © 1996 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesDeshmukh, Mandar M. ; Ralph, D. C. ; Thomas, M. ; Silcox, J.
Woodbury, NY : American Institute of Physics (AIP)
Published 1999Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: We describe tests of a technique to fabricate nanostructures by the evaporation of metal through a stencil mask etched in a suspended silicon nitride membrane. Collimated evaporation through the mask gives metal dots less than 15 nm in diameter and lines 15–20 nm wide. We have investigated the extent of hole clogging and the factors which determine the ultimate resolution of the technique. © 1999 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesPetta, Jason R. ; Salinas, D. G. ; Ralph, D. C.
Woodbury, NY : American Institute of Physics (AIP)
Published 2000Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: We present results from nanometer-scale tunnel junctions fabricated using organic self-assembled monolayers (SAMs) as tunnel barriers. Single junctions have resistances consistent with tunneling through a single layer of molecules. In several devices, a gold nanoparticle nucleated within the SAM barrier. Such samples allow a sensitive test of mechanical stability—some are sufficiently stable to permit the observation of electron tunneling through individual electron-in-a-box states at low voltages and mK temperatures. We also observe anomalous transport characteristics at larger voltages, which may be due to the motion of the gold nanoparticle within the monolayer. © 2000 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesKiselev, S. I. ; Sankey, J. C. ; Krivorotov, I. N. ; Emley, N. C. ; Schoelkopf, R. J. ; Buhrman, R. A. ; Ralph, D. C.
[s.l.] : Macmillian Magazines Ltd.
Published 2003Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] The recent discovery that a spin-polarized electrical current can apply a large torque to a ferromagnet, through direct transfer of spin angular momentum, offers the possibility of manipulating magnetic-device elements without applying cumbersome magnetic fields. However, a central question ...Type of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesStaff View
ISSN: 1573-7357Source: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract We discuss single-electron tunneling measurements at dilutionrefrigerator temperatures on metallic grains, sufficientlysmall that the quantum levels of the conduction electrons canbe resolved. These measurements directly reveal the energyeigenvalues of the electrons in a grain that typicallycontains a few thousand conduction electrons. Suchmeasurements were first carried out a few years ago by Ralph,et al. on nanograins of Al. More recently, this workhas been extended to measurements on nanoparticles of theheavy metal Au by Davidović and on nanoparticles ofalloys of Al and Au by Salinas, et al. This morerecent work has pointed up the need to go beyond the simplestindependent-electron model, to include the Coulomb interactionbetween electrons and also nonequilibrium electronpopulations. These interactions cause the energy levels tomerge into a continuum above the Thouless energy and can causea single quasiparticle level to show up as a cluster ofresonances. The strong spin-orbit interaction in Au cancause levels to split in magnetic fields with a g-factor of∼0.3, instead of the free electron g=2. In addition,there is evidence for a proliferation of low-lying energylevels suggestive of system spin values greater than1/2 induced by the exchangeinteraction. This paper will review the evolving progress thathas been made in interpreting these observations.Type of Medium: Electronic ResourceURL: