Theory of point-contact spectroscopy in electron-doped cuprate superconductors

C. S. Liu, W. C. Wu

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In the hole-doped d x2 - y2 -wave cuprate superconductors, due to the midgap surface state (MSS), a zero-bias conductance peak (ZBCP) is widely observed in [110] interface point-contact spectroscopy (PCS). However, a ZBCP of this geometry is rarely observed in the electron-doped cuprates, even though their pairing symmetry is still likely of the d x2 - y2 wave type. We argue that this is due to the coexistence of antiferromagnetic (AF) and superconducting orders. Generalizing the Blonder-Tinkham-Klapwijk formula to include an AF coupling, it is shown explicitly that the MSS is destroyed by the AF order. The calculated PCS is in good agreement with the experiments.

Original languageEnglish
Article number220504
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number22
DOIs
Publication statusPublished - 2007 Dec 6

Fingerprint

Point contacts
Surface states
cuprates
Spectroscopy
Electrons
spectroscopy
electrons
Geometry
symmetry
geometry
Experiments
Cuprate superconductors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Theory of point-contact spectroscopy in electron-doped cuprate superconductors. / Liu, C. S.; Wu, W. C.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 76, No. 22, 220504, 06.12.2007.

Research output: Contribution to journalArticle

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