Role of lattice in YBCO superconductors studied by Raman spectroscopy

L. Li; C. Q. Guo; J. X. Han; Y. Yan; W. T. Jin; S. J. Hao; F. Lin; K. Wei; H. Zhang

doi:10.1142/S0217979215420047

Role of lattice in YBCO superconductors studied by Raman spectroscopy

L. Li
, C. Q. Guo
, J. X. Han
, Y. Yan
, W. T. Jin
, S. J. Hao
, F. Lin
, K. Wei
, H. Zhang^*

^*Corresponding author for this work

Peking University

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

Abstract

In this paper, we systematically studied Ca-YBCO (Y_1-xCa_xBa₂Cu₃O_7-δ) and CaLa-YBCO (Y_1-xCa_xBa_2-xLa_xCu₃O_7-δ) systems by Raman spectroscopy. It is found that Tc is closely related to the vibration of lattice. In the Ca-YBCO system, the phonons around 115 and 335 cm^-1 harden as the Tc decreases. Oppositely, the 140 cm^-1 mode and the 220 cm^-1 mode soften. In the CaLa-YBCO system, the Tc decreases gradually with the content of Ca and La. The Raman peak of 140 cm^-1 mode hardens and the 360 cm^-1 mode softens. Besides, the fluctuations of phonons of 210 cm^-1 mode and 575 cm^-1 mode were observed.

Original language	English
Article number	1542004
Journal	International Journal of Modern Physics B
Volume	29
Issue number	25-26
DOIs	https://doi.org/10.1142/S0217979215420047
State	Published - 20 Oct 2015
Externally published	Yes

Keywords

high Tc superconductors
Raman spectroscopy
YBCO

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10.1142/S0217979215420047

Cite this

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title = "Role of lattice in YBCO superconductors studied by Raman spectroscopy",

abstract = "In this paper, we systematically studied Ca-YBCO (Y1-xCaxBa2Cu3O7-δ) and CaLa-YBCO (Y1-xCaxBa2-xLaxCu3O7-δ) systems by Raman spectroscopy. It is found that Tc is closely related to the vibration of lattice. In the Ca-YBCO system, the phonons around 115 and 335 cm-1 harden as the Tc decreases. Oppositely, the 140 cm-1 mode and the 220 cm-1 mode soften. In the CaLa-YBCO system, the Tc decreases gradually with the content of Ca and La. The Raman peak of 140 cm-1 mode hardens and the 360 cm-1 mode softens. Besides, the fluctuations of phonons of 210 cm-1 mode and 575 cm-1 mode were observed.",

keywords = "high Tc superconductors, Raman spectroscopy, YBCO",

author = "L. Li and Guo, \{C. Q.\} and Han, \{J. X.\} and Y. Yan and Jin, \{W. T.\} and Hao, \{S. J.\} and F. Lin and K. Wei and H. Zhang",

note = "Publisher Copyright: {\textcopyright} 2015 World Scientific Publishing Company.",

year = "2015",

month = oct,

day = "20",

doi = "10.1142/S0217979215420047",

language = "英语",

volume = "29",

journal = "International Journal of Modern Physics B",

issn = "0217-9792",

publisher = "World Scientific",

number = "25-26",

}

TY - JOUR

T1 - Role of lattice in YBCO superconductors studied by Raman spectroscopy

AU - Li, L.

AU - Guo, C. Q.

AU - Han, J. X.

AU - Yan, Y.

AU - Jin, W. T.

AU - Hao, S. J.

AU - Lin, F.

AU - Wei, K.

AU - Zhang, H.

PY - 2015/10/20

Y1 - 2015/10/20

N2 - In this paper, we systematically studied Ca-YBCO (Y1-xCaxBa2Cu3O7-δ) and CaLa-YBCO (Y1-xCaxBa2-xLaxCu3O7-δ) systems by Raman spectroscopy. It is found that Tc is closely related to the vibration of lattice. In the Ca-YBCO system, the phonons around 115 and 335 cm-1 harden as the Tc decreases. Oppositely, the 140 cm-1 mode and the 220 cm-1 mode soften. In the CaLa-YBCO system, the Tc decreases gradually with the content of Ca and La. The Raman peak of 140 cm-1 mode hardens and the 360 cm-1 mode softens. Besides, the fluctuations of phonons of 210 cm-1 mode and 575 cm-1 mode were observed.

AB - In this paper, we systematically studied Ca-YBCO (Y1-xCaxBa2Cu3O7-δ) and CaLa-YBCO (Y1-xCaxBa2-xLaxCu3O7-δ) systems by Raman spectroscopy. It is found that Tc is closely related to the vibration of lattice. In the Ca-YBCO system, the phonons around 115 and 335 cm-1 harden as the Tc decreases. Oppositely, the 140 cm-1 mode and the 220 cm-1 mode soften. In the CaLa-YBCO system, the Tc decreases gradually with the content of Ca and La. The Raman peak of 140 cm-1 mode hardens and the 360 cm-1 mode softens. Besides, the fluctuations of phonons of 210 cm-1 mode and 575 cm-1 mode were observed.

KW - high Tc superconductors

KW - Raman spectroscopy

KW - YBCO

UR - https://www.scopus.com/pages/publications/84944357641

U2 - 10.1142/S0217979215420047

DO - 10.1142/S0217979215420047

M3 - 文章

AN - SCOPUS:84944357641

SN - 0217-9792

VL - 29

JO - International Journal of Modern Physics B

JF - International Journal of Modern Physics B

IS - 25-26

M1 - 1542004

ER -

Role of lattice in YBCO superconductors studied by Raman spectroscopy

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Keywords

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