Search Results - (Author, Cooperation:D. B. Mitzi)

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  1. 1
    M. Graetzel ; R. A. Janssen ; D. B. Mitzi ; E. H. Sargent
    Nature Publishing Group (NPG)
    Published 2012
    Staff View
    Publication Date:
    2012-08-17
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    http://www.nature.com/

    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Dessau, D. S. ; Wells, B. O. ; Shen, Z.-X. ; Spicer, W. E. ; Arko, A. J. ; List, R. S. ; Olson, C. G. ; Eom, C. B. ; Mitzi, D. B. ; Kapitulnik, A. ; Geballe, T. H.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1991
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    We have used high-resolution photoemission spectroscopy to search for a proximity effect induced superconducting gap in gold overlayers on c-axis single crystals of Bi2Sr2CaCu2O8 and a-axis thin films of YBa2Cu3O7. These two junction types give us a representative sampling of very well characterized near-ideal interfaces (gold/c-axis Bi2Sr2CaCu2O8) and junctions in which the geometry more strongly favors the existence of the proximity effect but the interfacial quality may not be as ideal (gold/a-axis YBa2Cu3O7). In neither of these junction types did we observe any evidence for a proximity effect induced gap, and we place an upper limit of approximately 5 meV on its existence in the junctions that we have studied.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.104301

    Articles: DFG German National Licenses
  3. 3
    Dessau, D. S. ; Shen, Z.-X. ; Wells, B. O. ; Spicer, W. E. ; List, R. S. ; Arko, A. J. ; Bartlett, R. J. ; Fisk, Z. ; Cheong, S-W. ; Mitzi, D. B. ; Kapitulnik, A. ; Schirber, J. E.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1990
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    High-resolution photoemission has been used to probe the electronic structure of the gold/Bi2Sr2CaCu2O8 and gold/EuBa2Cu3O7−δ interface formed by a low-temperature (20 K) gold evaporation on cleaved high quality single crystals. We find that the metallicity of the EuBa2Cu3O7−δ substrate in the near surface region (∼5 A(ring)) is essentially destroyed by the gold deposition, while the near surface region of Bi2Sr2CaCu2O8 remains metallic. This has potentially wide ranging consequences for the applicability of the different types of superconductors in real devices.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.104219

    Articles: DFG German National Licenses
  4. 4
    Fanton, J. T. ; Mitzi, D. B. ; Kapitulnik, A. ; Khuri-Yakub, B. T. ; Kino, G. S. ; Gazit, D. ; Feigelson, R. S.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1989
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    We demonstrate a photothermal method for making point measurements of the thermal conductivities of high Tc superconductors. Images made at room temperature on polycrystalline materials show the thermal inhomogeneities. Measurements on single-crystal Bi2Sr2CaCu2Ox compounds reveal a very large anisotropy of about 7:1 in the thermal conductivity.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.101843

    Articles: DFG German National Licenses
  5. 5
    Lindberg, P. A. P. ; Shen, Z.-X. ; Wells, B. O. ; Mitzi, D. B. ; Lindau, I. ; Spicer, W. E. ; Kapitulnik, A.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1988
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The surface structure of Bi2Sr2CaCu2O8+δ has been studied using low-energy electron diffraction (LEED). Sharp diffraction spots indicative of a well-ordered surface are observed. The LEED patterns unequivocally show that this type of material preferentially cleaves along the a-b planes of the nearly tetragonal unit cell. A superstructure extending along one of the axes in the a-b plane (b) is found to have a periodicity of 27±0.5 A(ring), in good agreement with earlier studies of the three-dimensional crystal structure. We conclude that the superstructure at the surface is nonlocal in character and reflects the long-range superlattice of the bulk along the b axis. Intensity modulations of the diffraction spots oriented along the b axis are also reported and discussed in terms of the cell dimension of the unit cell along the b axis.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.100532

    Articles: DFG German National Licenses
  6. 6
    Lindberg, P. A. P. ; Shen, Z.-X. ; Wells, B. O. ; Dessau, D. S. ; Borg, A. ; Lindau, I. ; Spicer, W. E. ; Mitzi, D. B. ; Kapitulnik, A.

    Woodbury, NY : American Institute of Physics (AIP)
    Published 1989
    Staff View
    ISSN:
    1077-3118
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Polarization-dependent angle-resolved photoemission experiments in the constant final state mode (absorption measurements) were performed on single crystals of the Bi-based 2212 material using synchrotron radiation in the photon energy range 10–40 eV. Evidence of polarization-dependent transitions due to Bi 5d→6p, Sr 4p→4d, and Ca 3p→3d excitations is observed. The data show that the electronic charge is highly localized to the layers of the crystal structure, thus providing a direct spectroscopic confirmation of the two-dimensional nature of these types of materials. Polarization-sensitive absorption signals at 14–15 eV attributed to Bi 6s→6p transitions show that the density of states (DOS) of the Bi 6pz holes peaks at about 0.7 eV higher energy than the DOS of the Bi 6px,y holes.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.101889

    Articles: DFG German National Licenses
  7. 7
    Bishop, D. J. ; Gammel, P. L. ; Murray, C. A. ; Mitzi, D. B. ; Kapitulnik, A.

    Oxford, UK : Blackwell Publishing Ltd
    Published 1990
    Staff View
    ISSN:
    1749-6632
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Natural Sciences in General
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1111/j.1749-6632.1990.tb22701.x

    Articles: DFG German National Licenses
  8. 8
    Lindberg, P. A. P. ; Wells, B. O. ; Shen, Z.-X. ; Dessau, D. S. ; Lindau, I. ; Spicer, W. E. ; Mitzi, D. B. ; Kapitulnik, A.

    [S.l.] : American Institute of Physics (AIP)
    Published 1990
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    Photoemission results from Al and Rb interfaces with single crystals of Bi2Sr2CaCu2O8 high-temperature superconductors are reported. The Al and Rb adsorbates are found to react quite differently with the Bi2Sr2CaCu2O8 substrate. While adatoms of Rb significantly affect only the Bi and O atoms in the top atomic layer, the Al adsorbate profoundly disrupts the bonding character of the whole Bi2Sr2CaCu2O8 material. For Al, the Bi and Cu states are strongly reduced, and the Sr and O states show evidence of oxidized components. In addition, Al causes a strong out-diffusion of oxygen from the bulk. The differences in the reactivity of Al and Rb are discussed in terms of the different mobility of the two atoms.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1063/1.345480

    Articles: DFG German National Licenses
  9. 9
    Mitzi, D. B. ; Feild, C. A. ; Harrison, W. T. A. ; Guloy, A. M.

    [s.l.] : Nature Publishing Group
    Published 1994
    Staff View
    ISSN:
    1476-4687
    Source:
    Nature Archives 1869 - 2009
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Notes:
    [Auszug] Synthesis of the tin(n) organic-based layered perovskites is performed in an argon atmosphere to prevent oxidation. Unlike the oxide perovskites, where high temperatures are generally required for stabilization, these complex perovskites form near room temperature. First, separate solutions of SnI2 ...
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1038/369467a0

    Articles: DFG German National Licenses
  10. 10
    Takigawa, M. ; Mitzi, D. B.
    Springer
    Published 1994
    Staff View
    ISSN:
    1573-7357
    Keywords:
    74.72 Bk ; 76.60 Cq ; 76.60 Es
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract We report recent NMR results in cuprates. The oxygen Knight shift and the Cu nuclear spin-lattice relaxation rate in Bi2.1Sr1.94Ca0.88Cu2.07O8+δ single crystals revealed a gapless superconducting state, which can be most naturally explained by a d-wave pairing state and the intrinsic disorder in this material. The Cu nuclear spin-spin relaxation rate in underdoped YBa2Cu3O6.63 shows distinct temperature dependence from the spin-lattice relaxation rate, providing direct evidence for a pseudo spin-gap near the antiferromagnetic wave vector.
    Type of Medium:
    Electronic Resource
    URL:
    http://dx.doi.org/10.1007/BF00754926

    Articles: DFG German National Licenses