Direct observation of vortex lattice in Bi2Sr2CaCu2O8+δ by low temperature STM/STS

Noritaka Fukuo; Hideki Mashima; Taro Hitosugi; Satoshi Uchida; Jun ichi Shimoyama; Kohji Kishio; Yuji Matsumoto; Tetsuya Hasegawa

doi:10.1016/j.physc.2007.03.157

Direct observation of vortex lattice in Bi₂Sr₂CaCu₂O_8+δ by low temperature STM/STS

Noritaka Fukuo, Hideki Mashima, Taro Hitosugi, Satoshi Uchida, Jun ichi Shimoyama, Kohji Kishio, Yuji Matsumoto, Tetsuya Hasegawa

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

Abstract

In order to investigate the correlation between vortex distribution and inherent electronic inhomogeneity, we have performed scanning tunneling microscopy/spectroscopy (STM/STS) of optimally doped Bi2212 single crystals. Vortices have been successfully visualized by mapping differential tunneling conductance at 12 meV, which was substantially enhanced around the vortex cores. We found that most of the vortices were located in the regions displaying relatively large gaps and rounded gap edges. However, some vortices penetrated smaller gap regions, giving evidence that the non-superconducting large Δ regions originally existing in the crystals favor to pin down vortices.

Original language	English
Pages (from-to)	734-735
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	460-462 II
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physc.2007.03.157
Publication status	Published - 2007 Sept 1

Keywords

Bi2212
Electronic inhomogeneity
Scanning tunneling microscopy/spectroscopy
Vortex pinning

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.2007.03.157

Cite this

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title = "Direct observation of vortex lattice in Bi2Sr2CaCu2O8+δ by low temperature STM/STS",

abstract = "In order to investigate the correlation between vortex distribution and inherent electronic inhomogeneity, we have performed scanning tunneling microscopy/spectroscopy (STM/STS) of optimally doped Bi2212 single crystals. Vortices have been successfully visualized by mapping differential tunneling conductance at 12 meV, which was substantially enhanced around the vortex cores. We found that most of the vortices were located in the regions displaying relatively large gaps and rounded gap edges. However, some vortices penetrated smaller gap regions, giving evidence that the non-superconducting large Δ regions originally existing in the crystals favor to pin down vortices.",

keywords = "Bi2212, Electronic inhomogeneity, Scanning tunneling microscopy/spectroscopy, Vortex pinning",

author = "Noritaka Fukuo and Hideki Mashima and Taro Hitosugi and Satoshi Uchida and Shimoyama, {Jun ichi} and Kohji Kishio and Yuji Matsumoto and Tetsuya Hasegawa",

year = "2007",

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language = "English",

volume = "460-462 II",

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T1 - Direct observation of vortex lattice in Bi2Sr2CaCu2O8+δ by low temperature STM/STS

AU - Fukuo, Noritaka

AU - Mashima, Hideki

AU - Hitosugi, Taro

AU - Uchida, Satoshi

AU - Shimoyama, Jun ichi

AU - Kishio, Kohji

AU - Matsumoto, Yuji

AU - Hasegawa, Tetsuya

PY - 2007/9/1

Y1 - 2007/9/1

N2 - In order to investigate the correlation between vortex distribution and inherent electronic inhomogeneity, we have performed scanning tunneling microscopy/spectroscopy (STM/STS) of optimally doped Bi2212 single crystals. Vortices have been successfully visualized by mapping differential tunneling conductance at 12 meV, which was substantially enhanced around the vortex cores. We found that most of the vortices were located in the regions displaying relatively large gaps and rounded gap edges. However, some vortices penetrated smaller gap regions, giving evidence that the non-superconducting large Δ regions originally existing in the crystals favor to pin down vortices.

AB - In order to investigate the correlation between vortex distribution and inherent electronic inhomogeneity, we have performed scanning tunneling microscopy/spectroscopy (STM/STS) of optimally doped Bi2212 single crystals. Vortices have been successfully visualized by mapping differential tunneling conductance at 12 meV, which was substantially enhanced around the vortex cores. We found that most of the vortices were located in the regions displaying relatively large gaps and rounded gap edges. However, some vortices penetrated smaller gap regions, giving evidence that the non-superconducting large Δ regions originally existing in the crystals favor to pin down vortices.

KW - Bi2212

KW - Electronic inhomogeneity

KW - Scanning tunneling microscopy/spectroscopy

KW - Vortex pinning

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