Local Spectroscopy and Vortex-Core Imaging on ChemicallyWet-Etched Surfaces of YBa2Cu3Oy by Scanning Tunneling Microscopy/ Spectroscopy
Local Spectroscopy and Vortex-Core Imaging on ChemicallyWet-Etched Surfaces of YBa2Cu3Oy by Scanning Tunneling Microscopy/ Spectroscopy
复制标题
通过扫描隧道显微镜/光谱对 YBa2Cu3Oy 化学湿法蚀刻表面进行局部光谱和涡核成像
DOI：
10.1088/0953-2048/23/8/085004
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
and N. Kobayashi
中科院分区：
文献类型：
--
作者：
K. Shibata;T. Nishizaki;M. Maki;and N. Kobayashi
对YBa 2 Cu 3 Oy（YBCO）单晶的化学湿法腐蚀表面进行了低温扫描隧道显微镜/光谱分析。化学湿法刻蚀的YBCO表面是稳定的，在真空环境中，超导能隙谱观察到高空间均匀性的体超导转变温度，T{sub c}。当施加磁场时，在高达80 K的温度下检测到由于涡旋引起的局部电子调制，从而能够在高温（<T{sub c}）和磁场下对YBCO中的涡旋进行真实空间成像。此外，本地光谱揭示了由于弱杂质和这些杂质的涡旋钉扎的趋势与零偏异常的光谱。
Low-temperature scanning tunneling microscopy/spectroscopy has been performed on chemically wet-etched surfaces of YBa{sub 2}Cu{sub 3}O{sub y} (YBCO) single crystals. Chemically wet-etched YBCO surfaces are stable in ultrahigh vacuum environments, and superconducting gap spectra are observed with high spatial uniformity up to the bulk superconducting transition temperature, T{sub c}. When a magnetic field was applied, local electronic modulations due to vortices were detected up to 80 K, enabling the real-space imaging of vortices in YBCO at high temperatures (<T{sub c}) and magnetic fields. Furthermore, local spectroscopy revealed spectra with a zero-bias anomaly due to weak impurities and the tendency of vortex pinning by these impurities.