Effect of Cleaving Temperature on the Surface and Bulk Fermi Surface of Sr2RuO4 Investigated by High Resolution Angle-Resolved Photoemission

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	Effect of Cleaving Temperature on the Surface and Bulk Fermi Surface of Sr2RuO4 Investigated by High Resolution Angle-Resolved Photoemission
	Liu, SY ; Zhang, WT ; Weng, HM ; Zhao, L ; Liu, HY ; Jia, XW ; Liu, GD ; Dong, XL ; Zhang, J ; Mao, ZQ ; Chen, CT ; Xu, ZY ; Dai, X ; Fang, Z ; Zhou, XJ
刊名	CHINESE PHYSICS LETTERS
	2012
卷号	29 期号:6
关键词	LAYERED SUPERCONDUCTOR SR2RUO4 VAN-HOVE SINGULARITY TRIPLET FERROMAGNETISM PEROVSKITE
ISSN号	0256-307X
通讯作者	Zhou, XJ: Chinese Acad Sci, Nat Lab Superconduct, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	High resolution angle-resolved photoemission measurements are carried out to systematically investigate the effect of cleaving temperature on the electronic structures and Fermi surfaces of Sr2RuO4. Unlike previous reports, which found that a high cleaving temperature can suppress the surface Fermi surface, we find that the surface Fermi surface remains obvious and strong in Sr2RuO4 cleaved at high temperature, even at room temperature. This indicates that cleaving temperature is not a key effective factor in suppressing surface bands. On the other hand, the bulk bands can be enhanced in an aged surface of Sr2RuO4 that has been cleaved and held for a long time. We have also carried out laser ARPES measurements on Sr2RuO4 by using a vacuum ultra-violet laser (photon energy at 6.994 eV) and found an obvious enhancement of bulk bands even for samples cleaved at low temperature. This information is important for realizing an effective approach to manipulating and detecting the surface and bulk electronic structure of Sr2RuO4. In particular, the enhancement of bulk sensitivity, along with the super-high instrumental resolution of VUV laser ARPES, will be advantageous in investigating fine electronic structure and superconducting properties of Sr2RuO4 in the future.
收录类别	SCI
资助信息	National Natural Science Foundation of China [10734120, 91021006]; National Basic Research Program of China [2011CB921703, 2011CB605903]
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/36374]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Liu, SY,Zhang, WT,Weng, HM,et al. Effect of Cleaving Temperature on the Surface and Bulk Fermi Surface of Sr2RuO4 Investigated by High Resolution Angle-Resolved Photoemission[J]. CHINESE PHYSICS LETTERS,2012,29(6).
APA	Liu, SY.,Zhang, WT.,Weng, HM.,Zhao, L.,Liu, HY.,...&Zhou, XJ.(2012).Effect of Cleaving Temperature on the Surface and Bulk Fermi Surface of Sr2RuO4 Investigated by High Resolution Angle-Resolved Photoemission.CHINESE PHYSICS LETTERS,29(6).
MLA	Liu, SY,et al."Effect of Cleaving Temperature on the Surface and Bulk Fermi Surface of Sr2RuO4 Investigated by High Resolution Angle-Resolved Photoemission".CHINESE PHYSICS LETTERS 29.6(2012).