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  • 1
    Electronic Resource
    Electronic Resource
    Vibrational predissociation of benzene dimers and trimers by the crossed laser-molecular beam technique (1981)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 85 (1981), S. 3327-3333 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j150622a024
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  • 2
    Electronic Resource
    Electronic Resource
    Characterization of the Ag/YBa2Cu3O7−x contact in thin films (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 6336-6340 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Silver (Ag) contacts to very thin superconducting YBa2Cu3O7−x films were prepared by thermal evaporation. The nature of the Ag/YBa2Cu3O7−x contact during thermal treatment was in situ investigated by a combination of three- and four-terminal resistance measurements. The experimental results suggested that the interaction between Ag and the YBa2Cu3O7−x film began at a temperature of around 370 °C. The contact resistance measurement for different films also demonstrated that the contact property was a strong function of the film quality and surface conditions. The lack of reproducibility in forming a low-resistance contact to very thin YBa2Cu3O7−x films and the high probability of degrading the film quality after thermal treatment of the contact might be due to the excess Ag doping in YBa2Cu3O7−x. Ag island formation, as revealed by scanning electron microscopy after thermal treatment of the contact, is a limitation of Ag for use as a good contact electrode for very thin superconducting films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346878
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  • 3
    Electronic Resource
    Electronic Resource
    Structural and electrical properties of YBa2Cu3O7−x films on SrTiO3(110) substrates (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 7167-7169 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The structural and electrical properties of in situ laser deposited thin films of YBa2Cu3O7−x on SrTiO3(110) substrates were studied as a function of deposition temperature. It was found that at low temperatures, grains with the 〈110〉 axis perpendicular to the substrate surface dominated. At higher temperatures, 〈103〉 perpendicular films were obtained. The Jc was found to be extremely anisotropic. For 〈103〉 perpendicular films at 70 K, the Jc's were found to be 0.85×106 A/cm2 and 5×102 A/cm2 along the substrate 〈100〉 and 〈110〉 directions, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349755
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  • 4
    Electronic Resource
    Electronic Resource
    Time-resolved resonant absorption study of 532-nm laser-generated plumes over YBa2Cu3O7 targets (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 6349-6354 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The number densities n(t) of the atomic species produced by pulsed-laser (532-nm) interaction with YBaCuO targets were measured using time-resolved resonant absorption spectroscopy. At ∼5 J/cm2 fluence and 0.8 mm above the target, the peak n(t) ranged from 1013 to 1015 cm−3. The distributions of the normal z-velocity component could be modeled by Gaussian functions, in agreement with the theory of supersonic nozzle beams and the more recent theory of Knudsen layer formation. Such theoretical fits gave most probable z velocities in the km/s range and Mach numbers as high as 7. Ba-ion z velocities were better fitted by a 4:7 mix of fast (∼3-km/s) and slow (∼2-km/s) components.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348835
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  • 5
    Electronic Resource
    Electronic Resource
    Noise measurement of YBa2Cu3O7−x and Ti2Ba2Ca2Cu3O10−x thin films (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 553-555 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The noise of YBa2Cu3O7−x and Tl2Ba2Cr2Cu3O10−x thin films in the frequency range from 0.5 Hz to 100 kHz was studied. In the normal state, it was found that 1/f noise dominated, with a magnitude strongly dependent on temperature. In the superconducting state, the noise was only observable at frequencies below 5 Hz with our present setup. Equilibrium thermal fluctuation noise was not observed in these films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347655
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  • 6
    Electronic Resource
    Electronic Resource
    Al/Au and Cu/Au bilayer-metal contacts to YBa2Cu3O7−x thin films (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 4082-4084 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electrical contact resistivities of both Al and Cu single layer contacts as well as Cu/Au and Al/Au bilayer metal contacts to YBa2Cu3O7−x (YBCO) thin film have been studied. It was found that aluminum and copper make poor electrical contacts to YBCO due to interface reactions. These contacts have large contact resistivity (10−1–1 Ω cm2), orders of magnitude higher than that of a gold/YBCO contact (10−6 Ω cm2). When an ultrathin Au interlayer (10–30 A(ring)) was inserted between an Al or Cu overlayer and a YBCO film, interface reaction was greatly reduced. The contact resistivities of Al/Au and Cu/Au bilayer-metal contacts dropped by five orders of magnitude when Au interlayer thickness was increased from 0 to 10 A(ring). With the gold interlayer thickness of 15 A(ring), the Al/Au and Cu/Au bilayer-metal contacts reached a minimum contact resistivity, approaching that of a thick single-layer Au metal contact.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350834
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  • 7
    Electronic Resource
    Electronic Resource
    Characterization and minimization of flicker in silicon light valves (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 831-837 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have performed systematic characterizations of flicker in silicon light valves. It was found that there were four conduction mechanisms accounting for the flicker. These four mechanisms were residual dc charge on the silicon surface, voltage holding capability of the liquid crystal cell, voltage holding capability of the silicon panel, and parasitic capacitor coupling of the pixel. Major causes of these four mechanisms were identified. Solutions of flicker minimization were obtained for each mechanism. Among these solutions, offset of common voltage was found very useful to compensate for residual dc charge and parasitic capacitor coupling. Frame rate multiplication was found very useful for the minimization of flicker due to low voltage holding capabilities of the liquid crystal cell and silicon panel. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1331073
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  • 8
    Electronic Resource
    Electronic Resource
    State-resolved ultrafast internal conversion in chromyl chloride (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 6771-6776 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The technique of infrared multiphoton ionization was used to obtain state specific internal conversion rates in CrO2 Cl2. Using tunable 10 ps dye laser pulses, different vibrational states in the B1 manifold were excited and the energy relaxation was monitored by an IR ps laser pulse. The relaxation can be characterized by a fast component, which is due to internal conversion to the 1 A1 state, and a slow component, which is due to cooling of the vibrationally hot 1 A1 ground state. The nonradiative energy transfer rate changes by almost three orders of magnitude for an excess vibrational energy change of merely 550 cm−1. The possibility of state specific pumping of 1 A1 is also pointed out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455351
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  • 9
    Electronic Resource
    Electronic Resource
    Transmissive liquid crystal cell parameters measurement by spectroscopic ellipsometry (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 80-85 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A powerful method for liquid crystal (LC) cell twist angle and retardation measurement is presented. This method is based on the spectroscopic ellipsometry. By varying the polarizer and analyzer angles only, a transmission spectrum containing null transmission at some particular wavelengths can be obtained. Analytical equations derived bases on a polarization analysis of twisted birefringent layers are then solved to give all the LC cell parameters. In general, the twist angle, twist sense, retardation, and the rubbing direction can all be determined. Measurement results on commercial liquid crystal display panels are presented. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1332800
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  • 10
    Electronic Resource
    Electronic Resource
    Parameter space representation of liquid crystal display operating modes (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 3687-3693 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A parameter space approach is used to represent the operation of all liquid crystal displays. The Jones matrix nematic is used to analyze the static optical properties of liquid crystal displays with any twist angle, cell thickness, natural birefringence, and polarizer angles. All the usual display modes such as 90° TN, ECB, OMI, SBE, and STN can be visualized on a simple parameter space diagram. Besides its pedagogical values, this formulation has the advantage of simplicity in showing the physics and operating conditions of supertwist as well as low twist liquid crystal displays. It can also be used to analyze novel situations such as reflective displays which do not require any back polarizer. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.363317
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