Spin collective mode and quasiparticle contributions to STM spectra of d-wave superconductors with pinning

Research output: Contribution to journalConference articleContributedpeer-review

Contributors

  • Anatoli Polkovnikov - , Yale University (Author)
  • Subir Sachdev - , Yale University (Author)
  • Matthias Vojta - , Augsburg University (Author)

Abstract

We present additional details of the scanning tunneling microscopy spectra predicted by the model of pinning of dynamic spin collective modes in d-wave superconductor proposed by Polkovnikov et al. [Phys. Rev. B 65 (2002) 220509]. 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.

Details

Original languageEnglish
Pages (from-to)19-24
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume388-389
Publication statusPublished - May 2003
Peer-reviewedYes
Externally publishedYes

Conference

Titleproceedings of the 23rd international conference on low temper
Duration20 - 27 August 2002
CityHiroshima
CountryJapan