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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)
Publication Information
Progress in Superconductivity / v.13, no.3, 2012 , pp. 158-162 More about this Journal
Abstract
$Y(Pr)Ba_2Cu_4O_8$ 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.
Keywords
Superconductor; Cuprate; ARPES;
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