Effects of out-of-plane disorder on the nodal quasiparticle and superconducting gap in single-layer Bi$_2$Sr$_{1.6}Ln_{0.4}$CuO$_{6+δ}$ ($Ln$ = La, Nd, Gd)

M. Hashimoto; T. Yoshida; A. Fujimori; D. H. Lu; Z. -X. Shen; M. Kubota; K. Ono; M. Ishikado; K. Fujita; S. Uchida

doi:10.1103/PhysRevB.79.144517

paper

Effects of out-of-plane disorder on the nodal quasiparticle and superconducting gap in single-layer Bi $_{2}$ Sr $_{1.6} L n_{0.4}$ CuO $_{6 + δ}$ ( $L n$ = La, Nd, Gd)

arXiv:0807.1779 · doi:10.1103/PhysRevB.79.144517

Abstract

How out-of-plane disorder affects the electronic structure has been investigated for the single-layer cuprates Bi $_{2}$ Sr $_{1.6}$ $L n$ $_{0.4}$ CuO $_{6 + δ}$ ( $L n$ = La, Nd, Gd) by angle-resolved photoemission spectroscopy. We have observed that, with increasing disorder, while the Fermi surface shape and band dispersions are not affected, the quasi-particle width increases, the anti-nodal gap is enhanced and the superconducting gap in the nodal region is depressed. The results indicate that the superconductivity is significantly depressed by out-of-plane disorder through the enhancement of the anti-nodal gap and the depression of the superconducting gap in the nodal region.

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Effects of out-of-plane disorder on the nodal quasiparticle and superconducting gap in single-layer Bi2​Sr1.6​Ln0.4​CuO6+δ​ (Ln = La, Nd, Gd)

Abstract

References in corpus (15)

Cited by in corpus (14)

Effects of out-of-plane disorder on the nodal quasiparticle and superconducting gap in single-layer Bi $_{2}$ Sr $_{1.6} L n_{0.4}$ CuO $_{6 + δ}$ ( $L n$ = La, Nd, Gd)