Collective modes and quasiparticle interference on the local density of states of cuprate superconductors

Details Collective modes and quasiparticle interference on the local density of states of cuprate superconductors Collective modes and quasiparticle interference on the local density of states of cuprate superconductors

2003-07-26

arxiv.org/abs/cond-mat/0307660v2

Phys. Rev. B 68, 220505 (2003)

Physics

Condensed Matter

Superconductivity

5 figures, accepted for publication in Physical Review B, Rapid Communications. Contact author: Nai-Chang Yeh (e-mail address:

Scientific paper

10.1103/PhysRevB.68.220505

The energy, momentum and temperature dependence of the quasiparticle local density of states (LDOS) of a two-dimensional $d_{x^2-y^2}$-wave superconductor with random disorder is investigated using the first-order T-matrix approximation. The results suggest that collective modes such as spin/charge density waves are relevant low-energy excitations of the cuprates that contribute to the observed LDOS modulations in recent scanning tunneling microscopy studies of $\rm Bi_2Sr_2CaCu_2O_x$.

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