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Line-shape analysis of the Raman-spectrum from B1g bond buckling phonon in Bi2Sr2CaCu2O8+x

원문정보

J. Jeong, D. Oh, D. Song, H. Eisaki, C. Kim, S. R. Park

한국초전도저온학회 (구 한국초전도저온공학회) 한국초전도·저온논문지 (구 한국초전도저온공학회논문지) Vol.21 No.4 2019.12 pp.9-12
피인용수 : 0건 (자료제공 : 네이버학술정보)

초록

영어

We performed Raman spectroscopy on two different over-doped Bi2Sr2CaCu2O8+x (BSCCO), of which superconducting transition temperatures are 89 K and 77 K. Line-shape analysis of the Raman-spectrum was done, focused on B1g bond buckling mode which have drawn a lot of attention, since photoemission studies showed an evidence for strong coupling between the mode and electron. The line-shapes show asymmetry and are well fitted by the Fano line-shape formula. Remarkably, we found that the peak line-widths from B1g bond buckling mode in BSCCO show much broader than those in YBa2Cu3O7−x. The broad line width can be attributed to the superstructure modulation of BSCCO. Our results imply that B1g bond buckling mode may have close relation to the origin of superconductivity or to boosting the superconducting transition temperature in BSCCO.

목차

Abstract
1. INTRODUCTION
2. EXPERIMENTAL DETAILS
ACKNOWLEDGMENT
REFERENCES

키워드

저자정보

  • J. Jeong Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Korea
  • D. Oh Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Korea, Center for Correlated Electron Systems, Institute for Basic Science, Seoul, 08826, South Korea
  • D. Song Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Korea, Center for Correlated Electron Systems, Institute for Basic Science, Seoul, 08826, South Korea
  • H. Eisaki National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan
  • C. Kim Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Korea, Center for Correlated Electron Systems, Institute for Basic Science, Seoul, 08826, South Korea
  • S. R. Park Department of Physics, Incheon National University, Incheon, 22012, Korea

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