Interlayer pair tunneling and gap anisotropy in YBa$_2$Cu$_3$O$_{7-δ}$

Details Interlayer pair tunneling and gap anisotropy in YBa$_2$Cu$_3$O$_{7-δ}$ Interlayer pair tunneling and gap anisotropy in YBa$_2$Cu$_3$O$_{7-δ}$

2001-06-23

arxiv.org/abs/cond-mat/0106480v1

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.65.052508

Recent ARPES measurement observed a large $ab$-axis gap anisotropy, $\Delta(0,\pi)/\Delta(\pi,0)=1.5$, in clean YBa$_2$Cu$_3$O$_{7-\delta}$. This indicates that some sub-dominant component may exist in the $d_{x^2-y^2}$-wave dominant gap. We propose that the interlayer pairing tunneling contribution can be determined through the investigation of the order parameter anisotropy. Their potentially observable features in transport and spin dynamics are also studied.

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