Momentum density and Fermi surface of Nd2-xCexCuO4- delta.
Momentum density and Fermi surface of Nd2-xCexCuO4- delta.
复制标题
Nd2-xCexCuO4-δ 的动量密度和费米面。
DOI：
10.1103/physrevb.53.3613
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Péter
中科院分区：
文献类型：
--
作者：
Shukla;Barbiellini;Hoffmann;Manuel;Sadowski;Walker;Péter
高温正电子二维角相关湮没辐射（2D-ACAR）测量最近已成功地应用于YBa 2 Cu 3 O 7− δ费米面的部分映射。利用同样的原理，我们已经能够用体敏方法观察到Nd 2− x Ce x CuO 4− δ的费米面。虽然正电子被缺陷和相关效应捕获很强，但正电子2D-ACAR测量提供了来自费米表面的信号，与能带结构计算一致，证实了早期的表面敏感光电发射实验。
High-temperature positron two-dimensional angular correlation of annihilation radiation (2D-ACAR) measurements have recently been succesfully applied to map parts of the Fermi surface of YBa 2 Cu 3 O 7− δ. Using the same principle, we have been able to observe with a bulk sensitive method, the Fermi surface of Nd 2− x Ce x CuO 4− δ. Although positron trapping by defects and correlation effects are strong, positron 2D-ACAR measurements provide a signal from the Fermi surface which agrees with band-structure calculations, confirming earlier surface sensitive photoemission experiments.© 1996 The American Physical Society.