Angle-resolved photoemission spectroscopy of non-cuprate two-dimensional perovskite superconductor Sr2RuO4

	Angle-resolved photoemission spectroscopy of non-cuprate two-dimensional perovskite superconductor Sr2RuO4
	Yokoya, T ; Chainani, A ; Takahashi, T ; Ding, H ; Campuzano, JC ; Kasai, M ; Tokura, Y
刊名	PHYSICA B
	1997
卷号	237 页码:377
关键词	SINGULARITY
ISSN号	0921-4526
通讯作者	Yokoya, T (reprint author), TOHOKU UNIV,DEPT PHYS,SENDAI,MIYAGI 98077,JAPAN.
中文摘要	We have performed high-resolution angle-resolved photoemission spectroscopy on single crystal Sr2RuO4 at low temperature. We observed that the dispersion of energy bands near the Fermi level (E-F) is about two times smaller than the band calculation. One band forms an extended van-Hove singularity (vHs) near E-F around the midpoint between Gamma and Z point like in cuprate superconductors, regardless of the character of electronic states near E-F. The observed Fermi surface topology (one electron-like Fermi surface sheet centered at Gamma point and two hole-like ones centered at X point) is qualitatively different from the calculated Fermi surface topology (two electron-like fermi sheets centered at Gamma point and one hole-like one centered at X point), though the observed total electron count seems to be conserved, These results suggest that the extended vHs may be a general electronic structure of correlated two-dimensional metals and the correlation effect may change the Fermi surface topology as well as the band dispersion.
收录类别	SCI
语种	英语
公开日期	2014-02-20
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57985]
专题	物理研究所_所内人员在其他单位发表论文题录信息_所内人员在其他单位发表论文题录信息_期刊论文
推荐引用方式 GB/T 7714	Yokoya, T,Chainani, A,Takahashi, T,et al. Angle-resolved photoemission spectroscopy of non-cuprate two-dimensional perovskite superconductor Sr2RuO4[J]. PHYSICA B,1997,237:377.
APA	Yokoya, T.,Chainani, A.,Takahashi, T.,Ding, H.,Campuzano, JC.,...&Tokura, Y.(1997).Angle-resolved photoemission spectroscopy of non-cuprate two-dimensional perovskite superconductor Sr2RuO4.PHYSICA B,237,377.
MLA	Yokoya, T,et al."Angle-resolved photoemission spectroscopy of non-cuprate two-dimensional perovskite superconductor Sr2RuO4".PHYSICA B 237(1997):377.