Spin collective mode and quasiparticle contributions to STM spectra of d-wave superconductors with pinning
arXiv:cond-mat/0208334 · doi:10.1016/S0921-4534(02)02605-9
Abstract
We present additional details of the scanning tunneling microscopy (STM) spectra predicted by the model of pinning of dynamic spin collective modes in d-wave superconductor proposed by Polkovnikov et al. (cond-mat/0203176). Along with modulations at the twice the wavevector of the spin collective mode, the local density of states (LDOS) displays features linked to the spectrum of the Bogoliubov quasiparticles. The former is expected to depend more strongly on an applied magnetic field or the doping concentration. The spin collective mode and the quasiparticles are distinct, co-existing, low energy excitations of the d-wave superconductor (strongly coupled only in some sectors of the Brillouin zone), and should not be viewed as mutually exclusive sources of LDOS modulation.
arXiv commentProceedings of LT 23, Hiroshima; 6 pages, 4 figures; (v2) additional details of derivation of formulae provided; (v3) rewritten introduction for improved clarity; (v4) minor improvements; (v5) corrected statement below Eqn (13), pointed out by D. Scalapino
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