Electronic structure of the CuO-chain layer in YBa2Cu3O7-δ studied by scanning tunneling microscopy -: art. no. 140511
Electronic structure of the CuO-chain layer in YBa2Cu3O7-δ studied by scanning tunneling microscopy -: art. no. 140511
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DOI：
10.1103/physrevb.65.140511
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发表时间：
2002-04-01
影响因子：
3.7
通讯作者：
Kobayashi, N
中科院分区：
文献类型：
--
作者：
Maki, M;Nishizaki, T;Kobayashi, N
低温扫描隧道显微镜测量了不同氧含量（6.65小于等于7- δ小于等于6.98）的yba2cu3o7 - δ单晶。在cuo链层中，由于一维费米表面的2k(F)不稳定性，我们观察到由电荷密度波（CDW）引起的掺杂相关电荷调制图像。即使在所谓的60-K T-c高原区域，cuo链层的CDW相关性也部分存在。我们的扫描隧道显微镜结果表明，没有氧空位的CuO链是1/4填充的，倾向于形成CDW态。
Low-temperature scanning tunneling microscopy measurements have been performed on YBa2Cu3O7-delta single crystals with various oxygen contents (6.65less than or equal to7-deltaless than or equal to6.98). In the CuO-chain layer, we observe the doping-dependent charge modulation images that are attributed to the charge-density wave (CDW) due to the 2k(F) instability of the one-dimensional Fermi surface. Even in the so-called 60-K T-c plateau region, the CDW correlation in the CuO-chain layer survives partially. Our scanning tunneling microscopy results indicate that the CuO chain without oxygen vacancies is 1/4 filled and prefers to form a CDW state.