Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Line-shape analysis of the Raman-spectrum from B1g bond buckling phonon in Bi2Sr2CaCu2O8+x

  • Jeong, J. (Department of Physics and Astronomy, Seoul National University) ;
  • Oh, D. (Department of Physics and Astronomy, Seoul National University) ;
  • Song, D. (Department of Physics and Astronomy, Seoul National University) ;
  • Eisaki, H. (National Institute of Advanced Industrial Science and Technology (AIST)) ;
  • Kim, C. (Department of Physics and Astronomy, Seoul National University) ;
  • Park, S.R. (Department of Physics, Incheon National University)
  • Received : 2019.11.14
  • Accepted : 2019.12.03
  • Published : 2019.12.31
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Abstract

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.

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References

  1. J. G. Bednorz and K. A. Muller, "Possible highTc superconductivity in the Ba-La-Cu-O system," Zeitschrift für physik B Condensed Matter, vol. 64, pp. 189-193, 1986. https://doi.org/10.1007/BF01303701
  2. K. Alex Muller, "On the oxygen isotope effect and apex anharmonicity in high-$T_c$ cuprates," Zeitschrift für Physik B Condensed Matter, vol. 80, pp 193-201, 1990. https://doi.org/10.1007/BF01357502
  3. A. Abanov, Andrey V. Chubukov, and J. Schmalian, "Quantum-critical theory of the spin-fermion model and its application to cuprates:Normal state analysis," Advances in physics, vol. 52, pp. 119-218, 2003. https://doi.org/10.1080/0001873021000057123
  4. P. Monthoux, D. Pines, and G. G. Lonzarich, "Superconductaivity without phonons," Nature, vol. 450, pp. 1177-1183, 2007. https://doi.org/10.1038/nature06480
  5. T. Cuk, F. Baumbergerm, D. H. Lu, N. Ingle, X. J. Zhou, H. Eisaki, N. Kaneko, Z. Hussain et al., "Coupling of the B1g Phonon to the Antinodal Electronic States of $$Bi_2Sr_2Ca_{0.92}Y_{0.08}Cu_2O_{8+\delta}$$," Physical Review Letters, vol. 93, pp. 117003, 2004. https://doi.org/10.1103/PhysRevLett.93.117003
  6. T. P. Devereaux, T. Cuk, Z. -X, Shen, and N. Nagaosa, "Anisotropic Electron-phonon Interaction in the Cuprates," Physical Review Letters, vol. 93, pp. 117004, 2004. https://doi.org/10.1103/PhysRevLett.93.117004
  7. Y. He, M. Hashimoto, D. Song, S. -D Chen, J. He, et al., "Rapid change of superconductivity and electron-phonon coupling through critical doping in Bi-2212," Science, vol. 632, pp. 62-65, 2018.
  8. Thomas P. Devereaux and Rudi Hackl, "Inelastic light scattering from correlated electrons," Rev. Mod. Phys., vol. 79, pp. 175, 2007. https://doi.org/10.1103/RevModPhys.79.175
  9. M. Limonov, D. Shantesv, and S. Tajima, "Zn doping effect on the superconducting gap in $YBa_2Cu_3O_{7-8}$: Raman study," Phy. Rev. B, vol. 65, pp. 024515, 2001. https://doi.org/10.1103/PhysRevB.65.024515
  10. M. Le Tacon, A. Sacuto, Y. Gallais, D. Colson, and A. Forget, "Investigations of the relationship between Tc and the superconducting gap under magnetic and nonmagnetic impurity substitutions in $YBa_2Cu_3O_{7-\delta}$ ," Phys. Rev. B, vol. 76, pp. 144505, 2007. https://doi.org/10.1103/PhysRevB.76.144505
  11. S. Benhabib, A. Sacuto, M. Civelli, I. Paul, et al., "Collapse of the Normal-State Pseudogap at a Lifshitz Transition in the $Bi_2Sr_2CaCu_2O_{8+\delta}$ Cuprate Superconductor," Phys. Rev. Lett., vol. 144, pp. 147001, 2015.
  12. U. Fano, "Effetcts of Configuration Interaction on Intensities and Phase Shifts," Physical Review, vol. 124, pp. 6, 1961. https://doi.org/10.1103/PhysRev.124.1866
  13. A. A. Levin, Yu. I. Smolin, and Yu. F. Shepelev, "Causes of modulation and hole conductivity of the high-Tc superconductor $Bi_2Sr_2CaCu_2O_{8+x}$ according to x-ray single-crystal data," J. Phys.: Condens. Matter, vol. 6, pp. 3539-35551, 1994. https://doi.org/10.1088/0953-8984/6/19/009
  14. Y. He, S. Graser, P. J. Hischfeld, and H. -P. Cheng, "Supermodulation in the atomic structure of the superconductor $Bi_2Sr_2CaCu_2O_{8+x}$ from ab initio calculations," Phys. Rev. B, vol. 77, pp. 220507(R), 2008. https://doi.org/10.1103/PhysRevB.77.220507
  15. J. A. Slezak, Jinho Lee, M. Wang, K. McElroy, K. Fujita, B. M. Andersen, et al., "Imaging the impact on cuprate superconductivity of varying the interatomic distances within individual crystal unit cells," PNAS, vol. 105, pp. 3203-3208, 2008. https://doi.org/10.1073/pnas.0706795105