IntrinsictunnelingstudyofunderdopedBi2Sr2-xLaxCuO6+δsuperconductors

被引：0

作者：

任建坤 ^{[1
]}

任育峰 ^{[1
]}

田野 ^{[1
]}

于海峰 ^{[1
]}

郑东宁 ^{[1
]}

赵士平 ^{[1
]}

林成天 ^{[2
]}

机构：

[1] Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences

[2] Max-Planck-Institut fr Festkrperforschung

来源：

Chinese Physics B | 2011年 / 11期

关键词：

Bi2Sr2-xLaxCuO6+δ intrinsic Josephson junctions; tunneling spectra; superconducting gap; pseudogap;

D O I：

暂无

中图分类号：

O511.4 [];

学科分类号：

070205 ; 080705 ;

摘要：

<正>We report on a tunneling study of underdoped submicron Bi2Sr2-xLax;CuO6+δ（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 Tc= 29 K.Since the superconducting gap should have a value of 10-15 meV,our results indicate that the pseudogap（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 Tc,which shows that the IJJs can be a useful tool for the study of the electronic properties of the La-Bi2201 cuprate superconductors.

引用

页码：469 / 472

页数：4

共 30 条

[1]

Anagawa K,Yamada Y,Shibauchi T,Suzuki M,Watanabe T. Applied Physics Letters . 2003

[2]

J. Meng,W. Zhang,G. Luo,L. Zhao,H. Lui,X. Lia,W. Lu,X. Dong,G. Wang,H. Zhang,Y. Zhou,Y. Zhu,X. Wang,Z. Zhao,Z. Xu,C. Chen,X. Zhou. Physical Review B Condensed Matter and Materials Physics . 2009

[3]

Nakayama K,Sato T,Sekiba Y,Terashima K,Richard P,Takahashi T,Kudo K,Okumura N,Sasaki T,Kobayashi N. Physics Review Letters . 2009

[4]

Zasadzinski J F,Ozyuzer L,Coffey L,Gray K E,Hinks D G,Kendziora C. Physics Review Letters . 2006

[5]

Krasnov V M,Sandberg M,Zogaj I. Physical Review Letters . 2005

[6]

Zhu X B,Wei Y F,Zhao S P,Chen G H,Yang H F,Jin A Z,Gu C Z. Physical Review B Condensed Matter and Materials Physics . 2006

[7]

Zheng G Q,Kuhns P L,Reyes A P,Liang B,Lin C T. Physics Review Letters . 2005

[8]

A. Yurgens,D. Winkler,T. Claeson,S. Ono,Y. Ando. Physical Review Letters . 2003

[9]

T. Kondo,R. Khasanov,T. Takeuchi,J. Schmalian,A. Kaminski. Nature . 2009

[10]

Hashimoto M,He R H,Tanaka K,Testaud J P,Meevasana W,Moore R G,Lu D H,Yao H,Yoshida Y,Eisaki H,Devereaux T P,Hussain Z,Shen Z X. Nat.Phys . 2010

← 1 2 3 →