Ortho-II band folding in YBa2Cu3O7-δ films revealed by angle-resolved photoemission
Ortho-II band folding in YBa2Cu3O7-δ films revealed by angle-resolved photoemission
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DOI：
10.1103/physrevb.83.140511
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发表时间：
2011-04-22
影响因子：
3.7
通讯作者：
Patthey, L.
中科院分区：
文献类型：
--
作者：
Sassa, Y.;Radovic, M.;Patthey, L.
本文采用角分辨光电子能谱研究了脉冲激光沉积原位生长的YBa_2Cu_3O_（7-δ）薄膜。我们已经成功地产生了欠掺杂表面有序的CuO链内的氧空位，导致在一个明确的邻-II带的费米面折叠。这表明CuO链内的顺序影响CuO 2平面的电子性质。我们的研究结果突出的重要性，不仅有正确的表面载流子浓度，但也是一个非常有序和清洁的表面，以这种化合物的光电发射数据是代表的散装。
We present an angle-resolved photoelectron spectroscopy study of YBa2Cu3O7-delta films in situ grown by pulsed laser deposition. We have successfully produced underdoped surfaces with ordered oxygen vacancies within the CuO chains resulting in a clear ortho-II band folding of the Fermi surface. This indicates that order within the CuO chains affects the electronic properties of the CuO2 planes. Our results highlight the importance of having not only the correct surface carrier concentration, but also a very well ordered and clean surface in order that photoemission data on this compound be representative of the bulk.