Observation of Giant Isotope Effects Induced by Deuterium Ion Beam Irradiation of Zinc Oxide

摘要

Hydrogen introduction is a powerful method to control physical properties of materials. However conventional methods of hydrogen introduction are limited to a few materials and need very long time to introduce a large amount of hydrogen. Therefore, we have focused on a hydrogen ion beam irradiation for heavy hydrogen doping. Recently we have developed a hydrogen ion beam apparatus, by which low-temperature irradiation and in situ electrical resistivity measurement is available.1 By this apparatus, we observed an unforeseen thermal hysteresis of the resistivity of ZnO after irradiation at 50 K.1, 2 In this study, we have investigated isotope effects on the resistance change in a ZnO thin film by the low-temperature deuterium ion beam irradiation.