Effect of bilayer coupling on tunneling conductance of double-layer high T_c cuprates

Details Effect of bilayer coupling on tunneling conductance of double-layer high T_c cuprates Effect of bilayer coupling on tunneling conductance of double-layer high T_c cuprates

2003-12-03

arxiv.org/abs/cond-mat/0312091v1

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures, to be published in PRB

Scientific paper

10.1103/PhysRevB.68.212501

Physical effects of bilayer coupling on the tunneling spectroscopy of high T$_{c}$ cuprates are investigated. The bilayer coupling separates the bonding and antibonding bands and leads to a splitting of the coherence peaks in the tunneling differential conductance. However, the coherence peak of the bonding band is strongly suppressed and broadened by the particle-hole asymmetry in the density of states and finite quasiparticle life-time, and is difficult to resolve by experiments. This gives a qualitative account why the bilayer splitting of the coherence peaks was not clearly observed in tunneling measurements of double-layer high-T$_c$ oxides.

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