Intrinsic tunneling study of underdoped Bi2Sr2-xLaxCuO6+delta superconductors

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	Intrinsic tunneling study of underdoped Bi2Sr2-xLaxCuO6+delta superconductors
	Ren, JK ; Ren, YF ; Tian, Y ; Yu, HF ; Zheng, DN ; Zhao, SP ; Lin, CT
刊名	CHINESE PHYSICS B
	2011
卷号	20 期号:11
关键词	HIGH-T-C SINGLE-CRYSTALS PSEUDOGAP STATE SPECTROSCOPY BI2SR2CACU2O8+DELTA TEMPERATURE
ISSN号	1674-1056
通讯作者	Zhao, SP: Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China.
中文摘要	We report on a tunneling study of underdoped submicron Bi2Sr2-xLaxCuO6+delta (La-Bi2201) intrinsic Josephson junctions (IJJs), whose self-heating is sufficiently suppressed. The tunneling spectra are measured from 4.2 K up to the pseudogap opening temperature of T* = 260 K. The gap value found from the spectral peak position is about 35 meV and has a weak temperature dependence both below and above the superconducting transition temperature of T-c = 29 K. Since the superconducting gap should have a value of 10-15 meV, our results indicate that the pseudogap (similar to 35 meV) plays an important role in the underdoped La-Bi2201 intrinsic tunneling spectroscopy down to the lowest temperature of 4.2 K. However, the contribution of the superconducting gap can be separated by normalizing the spectra to the one near and above T-c, which shows that the IJJs can be a useful tool for the study of the electronic properties of the La-Bi2201 cuprate superconductors.
收录类别	SCI
资助信息	National Natural Science Foundation of China [10974242]; National Basic Research Program of China [2011CBA00106]
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/40225]
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	Ren, JK,Ren, YF,Tian, Y,et al. Intrinsic tunneling study of underdoped Bi2Sr2-xLaxCuO6+delta superconductors[J]. CHINESE PHYSICS B,2011,20(11).
APA	Ren, JK.,Ren, YF.,Tian, Y.,Yu, HF.,Zheng, DN.,...&Lin, CT.(2011).Intrinsic tunneling study of underdoped Bi2Sr2-xLaxCuO6+delta superconductors.CHINESE PHYSICS B,20(11).
MLA	Ren, JK,et al."Intrinsic tunneling study of underdoped Bi2Sr2-xLaxCuO6+delta superconductors".CHINESE PHYSICS B 20.11(2011).