Supercell Structure on Continuous Growth of Bi2Sr2Ca1Cu2Ox Film
Supercell Structure on Continuous Growth of Bi2Sr2Ca1Cu2Ox Film
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Bi2Sr2Ca1Cu2Ox 薄膜连续生长的超晶胞结构
DOI：
10.1143/jjap.47.5602
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发表时间：
2008
影响因子：
1.5
通讯作者：
M. Yoshimoto
中科院分区：
文献类型：
--
作者：
S. Kaneko;K. Akiyama;T. Ito;Y. Hirabayashi;H. Funakubo;M. Yoshimoto
由多层结构引起的应变影响了在铜酸铋超导膜中晶胞被扭曲以形成结构调制（超晶胞; SC）的强度。与多层结构相反，应变将在单个厚膜中释放。为了研究应变对SC结构的影响，在MgO（001）衬底上制备了较厚的Bi 2Sr 2Ca 1Cu 2 Ox（Bi-2212）薄膜，并将厚膜中的SC结构与单层薄膜和多层膜中的SC结构进行了比较。随着薄膜厚度从几层增加到几十层，Bi-2212的另一相成为主导结构，它绕表面法线旋转32°。在厚膜中，畸变变弱，导致SC结构产生的弱卫星。
The strain induced by a multilayered structure affects how strongly unit cells are distorted to form structural modulations (supercell; SC) in bismuth cuprate superconducting films. On the contrary to the multilayered structure, the strain will be released in a single thick film. To investigate the effect of strain on the SC structure, a relatively thick Bi2Sr2Ca1Cu2Ox (Bi-2212) film was prepared on a MgO(001) substrate, and the SC structure in the thick film was compared with those in single thin film and the multilayered films. With the increase in film thickness from a few layers to a few tens of hundred layers, another phase of Bi-2212 became a dominant structure, which rotated around the surface normal with an angle of 32°. The distortion became weak in the thick film, resulting in the weak satellite generated by the SC structure.