Copious electron emission from triglycine sulfate ferroelectric crystals

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  • V. D. Kugel
    Tel-Aviv University, Faculty of Engineering, Department of Electrical Engineering—Physical Electronics, Tel-Aviv 69978, Israel
  • G. Rosenman
    Tel-Aviv University, Faculty of Engineering, Department of Electrical Engineering—Physical Electronics, Tel-Aviv 69978, Israel
  • D. Shur
    Tel-Aviv University, Faculty of Engineering, Department of Electrical Engineering—Physical Electronics, Tel-Aviv 69978, Israel
  • Ya. E. Krasik
    Physics Department, Weizmann Institute of Science, Rehovot 76100, Israel

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<jats:p>It is shown experimentally that the electron charge emitted from triglycine sulfate pulse ferroelectric cathodes can be as large as 129 μC/cm2. This charge considerably exceeds the measured value of spontaneous polarization, Ps=2.8 μC/cm2. A bipolar voltage is found to facilitate the appearance of the electron emission. It is proposed that the source of the emission current is the plasma of uncompleted surface discharges. This plasma is initiated at the metal-vacuum-dielectric triple points both by the field electron emission and the electron emission stimulated by polarization switching.</jats:p>

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