Microwave responses on locally modified Bi₂Sr₂CaCu₂O_8+δ by near-field microwave microscope

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• 作者：Tadashi Machida ; Shuuichi Ooi ; Minoru Tachiki ; Takashi Mochiku ; Takuya Kato ; Hideaki Sakata ; Kazuto Hirata
• 关键词：Near-field microwave microscope ; Scanning tunneling microscope ; Cuprate ; Anodic oxidation
• 刊名：Physica C
• 出版年：2010
• 出版时间：December 2010
• 年：2010
• 卷：470
• 期：Supplement 1
• 页码：S1021-S1022
• 全文大小：279 K

文摘

We have locally modified a cleaved surface of single crystalline Bi₂Sr₂CaCu₂O_8+δ by local anodic oxidation using scanning tunneling microscope-assisted near-field scanning microwave microscope (STM-assisted NSMM). After the modification, we have measured the resonant frequency and the quality factor of the microwave responses near the modified region at 7.31 GHz. The resonant frequency and the quality factor increase at the modified region. It has been confirmed that the STM-assisted NSMM enables us both to modify the sample surface and to measure the microwave impedance on the modified region in nanoscale.