The wave-vector power spectrum of the local tunnelling density of states: ripples in a d-wave sea

Details The wave-vector power spectrum of the local tunnelling density of states: ripples in a d-wave sea The wave-vector power spectrum of the local tunnelling density of states: ripples in a d-wave sea

2003-02-27

arxiv.org/abs/cond-mat/0302563v3

Physics

Condensed Matter

Strongly Correlated Electrons

22 pages, 21 figures; enlarged discussion of the d-wave response, to be published in Physical Review B

Scientific paper

10.1103/PhysRevB.68.014508

A weak scattering potential imposed on a $CuO_2$ layer of a cuprate superconductor modulates the local density of states $N(x,\omega)$. In recently reported experimental studies scanning-tunneling maps of $N(x,\omega)$ have been Fourier transformed to obtain a wave-vector power spectrum. Here, for the case of a weak scattering potential, we discuss the structure of this power spectrum and its relationship to the quasi-particle spectrum and the structure factor of the scattering potential. Examples of quasi-particle interferences in normal metals and $s$- and d-wave superconductors are discussed.

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