Auflistung nach Schlagwort "temperature dependence"

Auflistung nach Schlagwort "temperature dependence"

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  • AC and DC Conductivity in Nano- and Microcrystalline Li2O : B2O3 Composites: Experimental Results and Theoretical Models 
    Indris, Sylvio; Heitjans, Paul; Ulrich, Markus; Bunde, Armin (Berlin : Walter de Gruyter, 2005)
    We report on impedance measurements of nano- and microcrystalline composites of the Li ion conductor Li2O and the ionic insulator B2O3 as well as their interpretation in the frame of percolation models. In the experimental ...
  • Conductance fluctuations at the quantum Hall plateau transition 
    Hohls, Frank; Zeitler, U.; Haug, Rolf J. (College Park, MD : American Physical Society, 2002)
    We analyze the conductance fluctuations observed in the quantum Hall regime for a bulk two-dimensional electron system in a Corbino geometry. We find that characteristics like the power spectral density and the temperature ...
  • Depinning transitions between adsorbate chains coupled by Friedel oscillations 
    Godzik, G.; Block, T.; Pfnür, Herbert (College Park, MD : American Physical Society, 2003)
    The low coverage phase transitions of the p(8×1) and the p(5×1) chain structures of the Sr/Mo(112) system have been investigated with low-energy electron diffraction (LEED) at constant coverages. It turns out that both ...
  • O/Ni(111): Lateral interactions and binding-energy difference between fcc and hcp sites 
    Schwennicke, C.; Pfnür, Herbert (College Park, MD : American Physical Society, 1997)
    Based on low-energy electron diffraction structural investigations of ordered and disordered phases of O/Ni(111) that show that occupation of both fcc and hcp sites can be forced either by thermal activation or by coverage, ...
  • Restructuring of the Ge(100) surface by Na chains 
    Ernst, Wolfgang; Jonas, K.-L.; von Oeynhausen, V.; Tegenkamp, Christoph; Pfnür, Herbert (College Park, MD : American Physical Society, 2003)
    The Na-induced surface structures on Ge(100) at concentrations below 0.1 monolayer (ML) have been investigated with low-energy electron diffraction and with scanning tunneling microscopy (STM). Annealing and partial ...
  • Role of domain walls in the abnormal photovoltaic effect in BiFeO 3 
    Bhatnagar, Akash; Roy Chaudhuri, Ayan; Kim, Young Heon; Hesse, Dietrich; Alexe, Marin (London : Nature Publishing Group, 2013)
    Recently, the anomalous photovoltaic (PV) effect in BiFeO 3 (BFO) thin films, which resulted in open circuit voltages (V oc) considerably larger than the band gap of the material, has generated a revival of the entire field ...
  • Shot noise in resonant tunneling through a zero-dimensional state with a complex energy spectrum 
    Nauen, A.; Hohls, Frank; Könemann, J.; Haug, Rolf J. (College Park, MD : American Physical Society, 2004)
    We investigate the noise properties of a GaAs/AlxGa 1-xAs resonant-tunneling structure at bias voltages where the current characteristic is determined by single electron tunneling. We discuss the suppression of the shot ...
  • Structural modifications of quasi-one-dimensional submonolayers by impurity doping 
    Godzik, G.; Block, T.; Pfnür, Herbert (College Park, MD : American Physical Society, 2004)
    In this study, carried out by analysis of intensities and spot profiles in low energy electron diffraction, we investigated the influence of electronegative oxygen atoms as dopants on the long range order, the thermal ...