ELECTRON-EMISSION FROM LINBO3 CRYSTALS WITH DOMAINS OF INVERTED POLARIZATION

Pyroelectrically induced electron emission (EE) is studied from LiNbO3 crystals with a layered domain structure fabricated under various dif fusion treatments. It is observed that the appearance of a thin opposi tely polarized surface layer at the +C-surface suppresses EE. For bido main configuration with equal thicknesses of the inverted and the orig inal domains EE occurs from the boundary between two domains. It is pr oposed that a potential barrier for emitted electrons depends strongly on the spontaneous polarization direction at a free polar surface,