STM studies on structural modulation and two-phase microstructures in Pb-doped Bi2201 single crystals

Terukazu Nishizaki; Kazutaka Kudo; Naoyuki Okumura; Norio Kobayashi

doi:10.1016/j.physc.2007.04.036

STM studies on structural modulation and two-phase microstructures in Pb-doped Bi2201 single crystals

Terukazu Nishizaki, Kazutaka Kudo, Naoyuki Okumura, Norio Kobayashi

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

6 Citations (Scopus)

Abstract

We have performed scanning tunneling microscopy studies on the structural modulation of Bi_{2.12 - x}Pb_xSr_1.88CuO_y (Pb_x-Bi2201, x = 0.18, 0.27, 0.32, 0.37) single crystals. The observed STM images show the clear atomic arrangement with the four-fold symmetry on the Bi(Pb)-O layer. The wavelength λ of incommensurate structural modulations along the b-axis increases with Pb content (i.e., λ ∼ 43 Å for x = 0.18) and the modulations completely disappear for x ∼ 0.37. In the intermediate content (x ∼ 0.27, 0.32), we find two-phase microstructures which consist of the modulated region with λ ∼ 46 Å and the modulation-free region.

Original language	English
Pages (from-to)	156-157
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	460-462 I
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physc.2007.04.036
Publication status	Published - Sep 1 2007
Externally published	Yes

Keywords

Pb-doped Bi2201
Phase separation
Scanning tunneling microscopy
Structural modulation

ASJC Scopus subject areas

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

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10.1016/j.physc.2007.04.036

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title = "STM studies on structural modulation and two-phase microstructures in Pb-doped Bi2201 single crystals",

abstract = "We have performed scanning tunneling microscopy studies on the structural modulation of Bi2.12 - xPbxSr1.88CuOy (Pbx-Bi2201, x = 0.18, 0.27, 0.32, 0.37) single crystals. The observed STM images show the clear atomic arrangement with the four-fold symmetry on the Bi(Pb)-O layer. The wavelength λ of incommensurate structural modulations along the b-axis increases with Pb content (i.e., λ ∼ 43 {\AA} for x = 0.18) and the modulations completely disappear for x ∼ 0.37. In the intermediate content (x ∼ 0.27, 0.32), we find two-phase microstructures which consist of the modulated region with λ ∼ 46 {\AA} and the modulation-free region.",

keywords = "Pb-doped Bi2201, Phase separation, Scanning tunneling microscopy, Structural modulation",

author = "Terukazu Nishizaki and Kazutaka Kudo and Naoyuki Okumura and Norio Kobayashi",

year = "2007",

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T1 - STM studies on structural modulation and two-phase microstructures in Pb-doped Bi2201 single crystals

AU - Nishizaki, Terukazu

AU - Kudo, Kazutaka

AU - Okumura, Naoyuki

AU - Kobayashi, Norio

PY - 2007/9/1

Y1 - 2007/9/1

N2 - We have performed scanning tunneling microscopy studies on the structural modulation of Bi2.12 - xPbxSr1.88CuOy (Pbx-Bi2201, x = 0.18, 0.27, 0.32, 0.37) single crystals. The observed STM images show the clear atomic arrangement with the four-fold symmetry on the Bi(Pb)-O layer. The wavelength λ of incommensurate structural modulations along the b-axis increases with Pb content (i.e., λ ∼ 43 Å for x = 0.18) and the modulations completely disappear for x ∼ 0.37. In the intermediate content (x ∼ 0.27, 0.32), we find two-phase microstructures which consist of the modulated region with λ ∼ 46 Å and the modulation-free region.

AB - We have performed scanning tunneling microscopy studies on the structural modulation of Bi2.12 - xPbxSr1.88CuOy (Pbx-Bi2201, x = 0.18, 0.27, 0.32, 0.37) single crystals. The observed STM images show the clear atomic arrangement with the four-fold symmetry on the Bi(Pb)-O layer. The wavelength λ of incommensurate structural modulations along the b-axis increases with Pb content (i.e., λ ∼ 43 Å for x = 0.18) and the modulations completely disappear for x ∼ 0.37. In the intermediate content (x ∼ 0.27, 0.32), we find two-phase microstructures which consist of the modulated region with λ ∼ 46 Å and the modulation-free region.

KW - Pb-doped Bi2201

KW - Phase separation

KW - Scanning tunneling microscopy

KW - Structural modulation

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