• Conference Object  

      ARPES studies of the superconducting gap in high-temperature superconductors 

      Ding, H.; Norman, M. R.; Giapintzakis, John; Campuzano, Juan C.; Claus, H.; Wuehl, H.; Randeria, M.; Bellman, A.; Yokoya, T.; Takahashi, T.; Mochiku, T.; Kadowaki, Kazuo; Ginsberg, Don M. (Affiliation: Argonne Natl. Lab. and Univ. of, Illinois/Chicago, Chicago, IL, USA, United StatesCorrespondence Address: Ding, H.Argonne Natl. Lab. and Univ. of, Illinois/Chicago, Chicago, IL, USAUnited States, 1996)
      Using high resolution angle-resolved photoemission spectroscopy (ARPES), we measure the superconducting gap and its momentum dependence in the high temperature superconductors Bi 2Sr 2CaCu 2O 8 (Bi2212) and YBa 2Cu 3O 6.95 ...
    • Article  

      Disorder-induced vortex phase transition in untwinned YBa2Cu3O7-δ crystal 

      Giller, D.; Giapintzakis, John; Shaulov, A.; Yeshurun, Y. (2000)
      Local magnetic measurements in an untwinned YBa2Cu3O7-δ crystal as a function of temperature, field and time reveal anomalies occurring along the same line BSS(T) in the field-temperature plane. We identify BSS(T) as a ...
    • Article  

      Progress in photothermal microscopy of YBa2Cu3O7-x 

      Studenmund, W. R.; Fishman, I. M.; Kino, G. S.; Giapintzakis, John (1998)
      We present recent differential optical reflectivity (DOR) measurements obtained at 633 nm (2.OeV), 780 nm (1.6eV), 1064 nm (1.16eV), and 1310nm (0.95 eV). We discuss calibration techniques which can correct for variations ...
    • Article  

      Tunneling in Pb-YBCO junctions: Determining the symmetry of the pairing state 

      Wollman, D. A.; Harlingen, D. J. Van; Giapintzakis, John; Ginsberg, D. M. (1995)
      We report on our efforts to understand the origin of supercurrent observed in c-axis tunnel junctions on YBCO [Sun A. G. et al., Phys. Rev. Lett. 72, 2267 (1994).] by studying the phase coherence of a-axis/c-axis and ...