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

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arxiv cond-mat/0307660 v2 pith:MZMU6LQ4 submitted 2003-07-26 cond-mat.supr-con

classification cond-mat.supr-con
keywords densitycollectiveldoslocalmodesquasiparticlestatesapproximation
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abstract

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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