Tunneling spectra of underdoped Bi2Sr2Ca1-xYxCu2O8+δ intrinsic Josephson junctions

doi:10.1088/1674-1056/19/8/087402

中国物理B ›› 2010, Vol. 19 ›› Issue (8): 87402-087402.doi: 10.1088/1674-1056/19/8/087402

Tunneling spectra of underdoped Bi₂Sr₂Ca_1-xY_xCu₂O_8+δ intrinsic Josephson junctions

任建坤¹, 田野¹, 任育峰¹, 赵士平¹, 袁涛², 王新强², 林德华²

(1)Beijing National Laboratory for Condensed Matter Physics,Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (2)Department of Physics, Chongqing University, Chongqing 400044, China

收稿日期:2010-02-22 修回日期:2010-04-07 出版日期:2010-08-15 发布日期:2010-08-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10974242).

Tunneling spectra of underdoped Bi₂Sr₂Ca_1-xY_xCu₂O_8+$\delta$ intrinsic Josephson junctions

Yuan Tao(袁涛)^a), Wang Xin-Qiang(王新强)^a)^†, Ren Jian-Kun(任建坤)^b), Lin De-Hua(林德华)^a), Tian Ye(田野)^b), Ren Yu-Feng(任育峰)^b), and Zhao Shi-Ping(赵士平)^b)^‡

^a Department of Physics, Chongqing University, Chongqing 400044, China; ^b Beijing National Laboratory for Condensed Matter Physics,Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Received:2010-02-22 Revised:2010-04-07 Online:2010-08-15 Published:2010-08-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10974242).

摘要/Abstract

摘要： Project supported by the National Natural Science Foundation of China (Grant No. 10974242).

关键词: Mesa-structured submicron intrinsic Josephson junctions are successfully fabricated and well characterized on underdoped Bi₂Sr₂Ca_1-xY_xCu₂O_8+&delta, single crystals with a T_c of 80 K. T

Abstract: Mesa-structured submicron intrinsic Josephson junctions are successfully fabricated and well characterized on underdoped Bi₂Sr₂Ca_1-xY_xCu₂O_8+$\delta$single crystals with a T_c of 80 K. Tunneling spectra at the temperatures ranging from 4.2 K to 295 K are measured. A pulse technique is used to reduce sample heating for the measurement near pseudogap opening temperature T^*～280 K. Our experimental results show that the superconducting gap, the peakdip separation, and the pseudogap opening temperature are all increased as compared with those from near optimally doped samples, which requires further theoretical analysis in the future.

Key words: underdoped Bi₂Sr₂Ca_1-xY_xCu₂O_8+$\delta$ superconductors, intrinsic Josephson junctions, tunneling spectra

中图分类号: (Tunneling phenomena; Josephson effects)

74.50.+r

74.25.Jb (Electronic structure (photoemission, etc.)) 74.62.Bf (Effects of material synthesis, crystal structure, and chemical composition) 74.62.Dh (Effects of crystal defects, doping and substitution)

袁涛, 王新强, 任建坤, 林德华, 田野, 任育峰, 赵士平. Tunneling spectra of underdoped Bi₂Sr₂Ca_1-xY_xCu₂O_8+δ intrinsic Josephson junctions[J]. 中国物理B, 2010, 19(8): 87402-087402.

Yuan Tao(袁涛), Wang Xin-Qiang(王新强), Ren Jian-Kun(任建坤), Lin De-Hua(林德华), Tian Ye(田野), Ren Yu-Feng(任育峰), and Zhao Shi-Ping(赵士平). Tunneling spectra of underdoped Bi₂Sr₂Ca_1-xY_xCu₂O_8+$\delta$ intrinsic Josephson junctions[J]. Chin. Phys. B, 2010, 19(8): 87402-087402.

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Tunneling spectra of underdoped Bi₂Sr₂Ca_1-xY_xCu₂O_8+δ intrinsic Josephson junctions

Tunneling spectra of underdoped Bi₂Sr₂Ca_1-xY_xCu₂O_8+$\delta$ intrinsic Josephson junctions

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