Progress in Superconductivity

한국초전도학회 (The Korean Superconductivity Society)
권호 표지

광전자실험을 이용한 $Y(Pr)Ba_2Cu_4O_8$ 물질의 체인 전자 구조분석

Photoemission Studies on Chain Electronic Structures of $Y(Pr)Ba_2Cu_4O_8$

  • Boo, Y.G. (Institute of Physics and Applied Physics, Yonsei University) ;
  • Jung, W.S. (Institute of Physics and Applied Physics, Yonsei University) ;
  • Han, Ga-Ram (Institute of Physics and Applied Physics, Yonsei University) ;
  • Kim, C. (Institute of Physics and Applied Physics, Yonsei University)
  • 투고 : 2012.04.02
  • 심사 : 2012.04.18
  • 발행 : 2012.04.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

$Y(Pr)Ba_2Cu_4O_8$ system is one of the most studied high temperature superconductors. Substitution of Pr for Y in this system suppresses $T_c$ and superconductivity finally disappears at a high Pr doping. There are competing theories for the suppression of $T_c$ but systematic experimental results are very rare. In order to find the change in Fermi surface topology which can affect the superconductivity, we have performed angle-resolved photoemission studies on single crystal samples of $YBa_2Cu_4O_8$ and $PrBa_2Cu_4O_8$. While the Fermi surface of $YBa_2Cu_4O_8$ shows a similar topology to those of other cuprates, we observe only 1D like band structures in $PrBa_2Cu_4O_8$. We find no significant differences in the chain band for both samples.

키워드

참고문헌

  1. J. Bardeen, L. N. Cooper, J. R. Schrieffer, "Theory of superconductivity", Phys. Rev. 108, 1175 (1957). https://doi.org/10.1103/PhysRev.108.1175
  2. Bednorz, J. G, and K. A. Muller, "Possible high Tc superconductivity in the Ba-La-Cu-O system", Z. phys. B : Condens. Matter 64, 189 (1986). https://doi.org/10.1007/BF01303701
  3. M. K. Wu, J. R. Ashburn, C. J. Torng, P. H. Hor, R. L. Meng, L. Gao, Z. J. Huang, Y. Q. Wang, and C. W. Chu, "Superconductivity at 93 K in a new mixed- phase Y-Ba-Cu-O compound system at ambient pressure", Phys. Rev. Lett. 58, 908-910 (1987). https://doi.org/10.1103/PhysRevLett.58.908
  4. Ruixing Liang, P. Dosanjh, D. A. Bonn, D. J. Baar, J. F. carolan, W. N. Hardy, "Growth and properties of superconducting YBCO single crystals", Physica C : Superconductivity, 195, 51-58 (1992). https://doi.org/10.1016/0921-4534(92)90073-L
  5. D. N. Basov, T. Timusk, "Electrodynamics of high- Tc superconductors", Rev. Mod. Phys, 77, 721-779 (2005). https://doi.org/10.1103/RevModPhys.77.721
  6. M. B. Maple, Y. Dalichaouch, J. M. Ferreira, R. R. Hake, B. W. Lee, J. J. Neumeier, M. S. Torikachvili, K. N. Yang and H. Zhou, "RBaCuO(R=rare earth) high Tc magnetic supercoductors", Physica, 148B, 155-162 (1987).
  7. J. Fink, N. Nucker, H. Romberg, M. Alexander, M. B. maple, J. J. Neumeier, J. W. Allen, "Evidence against hole filling by Pr in YBaCuO", Phys. Rev. B 42, 4823-4826 (1990). https://doi.org/10.1103/PhysRevB.42.4823
  8. R. Fehrenbacher, T. M. Rice, "Unusual electronic structure of PBCO", Phys. Rev. Lett, 70, 3471-3474 (1993). https://doi.org/10.1103/PhysRevLett.70.3471
  9. A. Serafin, J. D. Fletcher, S. Adachi, N. E. Hussey, A. Carrington, "Destruction of chain superconductivity in YBCO1248 in a weak magnetic field", Phys. Rev. B 82, 140506 (2010). https://doi.org/10.1103/PhysRevB.82.140506
  10. N. E. Hussey, M. N. McBrien, L. Balicas, J. S. Brooks, S. Horii, H. Ikuta, "Three-dimensional Fermi-liquid ground state in the quasi one dimensional cuprate PrBCO", Phys. Rev. Lett. 89, 086602 (2002).
  11. B. J. Kim, H. Koh, E. Rotenberg, S. J. Oh, H. eisaki, N. Motoyama, S. Uchida, T. Tohyama, S. Maekawa, Z. X. shen, C. Kim, "Distinct spinon and holon dispersions in photoemission spectral functions from one-dimensional SrCuO", Nature physics 2, 397-401 (2006). https://doi.org/10.1038/nphys316
  12. T. Kondo, R. Khasanov, J. Karpinski, S. M. Kazakov, N. D. Zhigadlo, T. ohta, H. M. Fretwell, A. D. Palczewski, J. D. Koll, J. Mesot, E. Rotenberg, H. Keller, A. Kaminski, "Dual character of the electronic structure of YBCO: The conduction bands of CuO planes and CuO chains", Phys. Rev. Lett. 98, 157002 (2007). https://doi.org/10.1103/PhysRevLett.98.157002
  13. T. Xiang, J. M. Wheatley, "Superfluid anisotropy in YBCO : Evidence for pair tunneling superconductivity", Phys. Rev. Lett. 76, 134-137 (1996). https://doi.org/10.1103/PhysRevLett.76.134