Raman-active phonons in Bi2Sr2Ca1-xYxCu2O 8+d (x=0-1): Effects of hole filling and internal pressure induced by Y doping for Ca, and implications for phonon assignments

Masato Kakihana, Minoru Osada, Mikael Käll, Lars Börjesson, Hiromasa Mazaki, Hiroshi Yasuoka, Masatomo Yashima, Masahiro Yoshimura

Research output: Contribution to journalArticle

87 Citations (Scopus)

Abstract

The phonon Raman spectra of Bi2Sr2Ca1-xYxCu2O 8+d (x=0-1) have been investigated in a number of well-defined single-crystal and polycrystalline samples. From the polarization and Y-doping dependence, and from a comparison with previous reports on Bi-based cuprates, we identify the (6A1g+1B1g) symmetry modes that are Raman allowed within the ideal body-centered-tetragonal unit cell. A large number of extra "disorder-induced" phonon bands are observed in the ab-plane polarized spectra. In contrast to most previous reports, we argue that the c-axis polarized phonon band around 629 cm-1 is due to the O(2)Sr A1g vibration, while the exclusively ab-plane polarized band around 463 cm-1 is induced by the O(3)BiA1g vibration. With increasing Y doping we find that the vibrational modes involving atoms in the CuO2 planes rapidly increase in intensity as a result of the reduced metallic screening in the hole-depleted Y-doped samples. We also find that Y substitution gives rise to a substantial hardening of the O(1)CuA1g and B1g phonons by ∼40 cm-1, whereas the O(2)SrA1g phonon is found to soften by ∼20 cm-1, when x increases from 0 to 1. The phonon frequency changes can be explained by the "internal pressure" induced by the decrease in the average Ca/Y ion size and an additional "charge-transfer" induced by the change in the Cu and Bi valences with Y doping.

Original languageEnglish
Pages (from-to)11796-11806
Number of pages11
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume53
Issue number17
Publication statusPublished - 1996 May 1
Externally publishedYes

Fingerprint

internal pressure
Phonons
phonons
Doping (additives)
vibration
hardening
cuprates
Hardening
Charge transfer
Raman scattering
vibration mode
Screening
Substitution reactions
screening
charge transfer
Single crystals
disorders
Ions
substitutes
Polarization

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Raman-active phonons in Bi2Sr2Ca1-xYxCu2O 8+d (x=0-1) : Effects of hole filling and internal pressure induced by Y doping for Ca, and implications for phonon assignments. / Kakihana, Masato; Osada, Minoru; Käll, Mikael; Börjesson, Lars; Mazaki, Hiromasa; Yasuoka, Hiroshi; Yashima, Masatomo; Yoshimura, Masahiro.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 53, No. 17, 01.05.1996, p. 11796-11806.

Research output: Contribution to journalArticle

Kakihana, Masato ; Osada, Minoru ; Käll, Mikael ; Börjesson, Lars ; Mazaki, Hiromasa ; Yasuoka, Hiroshi ; Yashima, Masatomo ; Yoshimura, Masahiro. / Raman-active phonons in Bi2Sr2Ca1-xYxCu2O 8+d (x=0-1) : Effects of hole filling and internal pressure induced by Y doping for Ca, and implications for phonon assignments. In: Physical Review B - Condensed Matter and Materials Physics. 1996 ; Vol. 53, No. 17. pp. 11796-11806.
@article{1b9221edbbe741519ceb64111773eaf4,
title = "Raman-active phonons in Bi2Sr2Ca1-xYxCu2O 8+d (x=0-1): Effects of hole filling and internal pressure induced by Y doping for Ca, and implications for phonon assignments",
abstract = "The phonon Raman spectra of Bi2Sr2Ca1-xYxCu2O 8+d (x=0-1) have been investigated in a number of well-defined single-crystal and polycrystalline samples. From the polarization and Y-doping dependence, and from a comparison with previous reports on Bi-based cuprates, we identify the (6A1g+1B1g) symmetry modes that are Raman allowed within the ideal body-centered-tetragonal unit cell. A large number of extra {"}disorder-induced{"} phonon bands are observed in the ab-plane polarized spectra. In contrast to most previous reports, we argue that the c-axis polarized phonon band around 629 cm-1 is due to the O(2)Sr A1g vibration, while the exclusively ab-plane polarized band around 463 cm-1 is induced by the O(3)BiA1g vibration. With increasing Y doping we find that the vibrational modes involving atoms in the CuO2 planes rapidly increase in intensity as a result of the reduced metallic screening in the hole-depleted Y-doped samples. We also find that Y substitution gives rise to a substantial hardening of the O(1)CuA1g and B1g phonons by ∼40 cm-1, whereas the O(2)SrA1g phonon is found to soften by ∼20 cm-1, when x increases from 0 to 1. The phonon frequency changes can be explained by the {"}internal pressure{"} induced by the decrease in the average Ca/Y ion size and an additional {"}charge-transfer{"} induced by the change in the Cu and Bi valences with Y doping.",
author = "Masato Kakihana and Minoru Osada and Mikael K{\"a}ll and Lars B{\"o}rjesson and Hiromasa Mazaki and Hiroshi Yasuoka and Masatomo Yashima and Masahiro Yoshimura",
year = "1996",
month = "5",
day = "1",
language = "English",
volume = "53",
pages = "11796--11806",
journal = "Physical Review B-Condensed Matter",
issn = "0163-1829",
publisher = "American Institute of Physics Publising LLC",
number = "17",

}

TY - JOUR

T1 - Raman-active phonons in Bi2Sr2Ca1-xYxCu2O 8+d (x=0-1)

T2 - Effects of hole filling and internal pressure induced by Y doping for Ca, and implications for phonon assignments

AU - Kakihana, Masato

AU - Osada, Minoru

AU - Käll, Mikael

AU - Börjesson, Lars

AU - Mazaki, Hiromasa

AU - Yasuoka, Hiroshi

AU - Yashima, Masatomo

AU - Yoshimura, Masahiro

PY - 1996/5/1

Y1 - 1996/5/1

N2 - The phonon Raman spectra of Bi2Sr2Ca1-xYxCu2O 8+d (x=0-1) have been investigated in a number of well-defined single-crystal and polycrystalline samples. From the polarization and Y-doping dependence, and from a comparison with previous reports on Bi-based cuprates, we identify the (6A1g+1B1g) symmetry modes that are Raman allowed within the ideal body-centered-tetragonal unit cell. A large number of extra "disorder-induced" phonon bands are observed in the ab-plane polarized spectra. In contrast to most previous reports, we argue that the c-axis polarized phonon band around 629 cm-1 is due to the O(2)Sr A1g vibration, while the exclusively ab-plane polarized band around 463 cm-1 is induced by the O(3)BiA1g vibration. With increasing Y doping we find that the vibrational modes involving atoms in the CuO2 planes rapidly increase in intensity as a result of the reduced metallic screening in the hole-depleted Y-doped samples. We also find that Y substitution gives rise to a substantial hardening of the O(1)CuA1g and B1g phonons by ∼40 cm-1, whereas the O(2)SrA1g phonon is found to soften by ∼20 cm-1, when x increases from 0 to 1. The phonon frequency changes can be explained by the "internal pressure" induced by the decrease in the average Ca/Y ion size and an additional "charge-transfer" induced by the change in the Cu and Bi valences with Y doping.

AB - The phonon Raman spectra of Bi2Sr2Ca1-xYxCu2O 8+d (x=0-1) have been investigated in a number of well-defined single-crystal and polycrystalline samples. From the polarization and Y-doping dependence, and from a comparison with previous reports on Bi-based cuprates, we identify the (6A1g+1B1g) symmetry modes that are Raman allowed within the ideal body-centered-tetragonal unit cell. A large number of extra "disorder-induced" phonon bands are observed in the ab-plane polarized spectra. In contrast to most previous reports, we argue that the c-axis polarized phonon band around 629 cm-1 is due to the O(2)Sr A1g vibration, while the exclusively ab-plane polarized band around 463 cm-1 is induced by the O(3)BiA1g vibration. With increasing Y doping we find that the vibrational modes involving atoms in the CuO2 planes rapidly increase in intensity as a result of the reduced metallic screening in the hole-depleted Y-doped samples. We also find that Y substitution gives rise to a substantial hardening of the O(1)CuA1g and B1g phonons by ∼40 cm-1, whereas the O(2)SrA1g phonon is found to soften by ∼20 cm-1, when x increases from 0 to 1. The phonon frequency changes can be explained by the "internal pressure" induced by the decrease in the average Ca/Y ion size and an additional "charge-transfer" induced by the change in the Cu and Bi valences with Y doping.

UR - http://www.scopus.com/inward/record.url?scp=0000079808&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000079808&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0000079808

VL - 53

SP - 11796

EP - 11806

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 17

ER -