High-Tc superconductor near the S-I transition

T. Kasai; H. Nakajima; T. Fujii; I. Terasaki; T. Watanabe; H. Shibata; A. Matsuda

doi:10.1016/j.physc.2009.05.179

High-T_c superconductor near the S-I transition

T. Kasai, H. Nakajima, T. Fujii, I. Terasaki, T. Watanabe, H. Shibata, A. Matsuda^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We report on the density of states measurements of Bi2212 (Bi_2+xSr_xCaCu₂O_8+δ) near the superconductivity-insulator transition using a low temperature scanning tunneling microscope. We prepared highly underdoped Bi rich Bi2212 single crystals (T_c ∼ 32 K). The energy gap distribution did not provide an energy scale proportional to T_c. Averaged tunnel spectra with various doping levels were scaled into a single line if energy was normalized by their respective gap values. This indicated there was no crossover energy, which separates a pseudogap and a superconducting gap.

Original language	English
Pages (from-to)	1016-1019
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	469
Issue number	15-20
DOIs	https://doi.org/10.1016/j.physc.2009.05.179
Publication status	Published - 2009 Oct 15
Externally published	Yes

Keywords

Bi2212
STM
Superconductor
Underdoped

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/j.physc.2009.05.179

Cite this

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title = "High-Tc superconductor near the S-I transition",

abstract = "We report on the density of states measurements of Bi2212 (Bi2+xSrxCaCu2O8+δ) near the superconductivity-insulator transition using a low temperature scanning tunneling microscope. We prepared highly underdoped Bi rich Bi2212 single crystals (Tc ∼ 32 K). The energy gap distribution did not provide an energy scale proportional to Tc. Averaged tunnel spectra with various doping levels were scaled into a single line if energy was normalized by their respective gap values. This indicated there was no crossover energy, which separates a pseudogap and a superconducting gap.",

keywords = "Bi2212, STM, Superconductor, Underdoped",

author = "T. Kasai and H. Nakajima and T. Fujii and I. Terasaki and T. Watanabe and H. Shibata and A. Matsuda",

note = "Funding Information: This work was supported in part by “Academic Frontier” project from MEXT and Grants from the Ministry of Education, Culture and Science of Japan.",

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language = "English",

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T1 - High-Tc superconductor near the S-I transition

AU - Kasai, T.

AU - Nakajima, H.

AU - Fujii, T.

AU - Terasaki, I.

AU - Watanabe, T.

AU - Shibata, H.

AU - Matsuda, A.

N1 - Funding Information: This work was supported in part by “Academic Frontier” project from MEXT and Grants from the Ministry of Education, Culture and Science of Japan.

PY - 2009/10/15

Y1 - 2009/10/15

N2 - We report on the density of states measurements of Bi2212 (Bi2+xSrxCaCu2O8+δ) near the superconductivity-insulator transition using a low temperature scanning tunneling microscope. We prepared highly underdoped Bi rich Bi2212 single crystals (Tc ∼ 32 K). The energy gap distribution did not provide an energy scale proportional to Tc. Averaged tunnel spectra with various doping levels were scaled into a single line if energy was normalized by their respective gap values. This indicated there was no crossover energy, which separates a pseudogap and a superconducting gap.

AB - We report on the density of states measurements of Bi2212 (Bi2+xSrxCaCu2O8+δ) near the superconductivity-insulator transition using a low temperature scanning tunneling microscope. We prepared highly underdoped Bi rich Bi2212 single crystals (Tc ∼ 32 K). The energy gap distribution did not provide an energy scale proportional to Tc. Averaged tunnel spectra with various doping levels were scaled into a single line if energy was normalized by their respective gap values. This indicated there was no crossover energy, which separates a pseudogap and a superconducting gap.

KW - Bi2212

KW - STM

KW - Superconductor

KW - Underdoped

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