Spatial modulation of midgap states in (001) La1.88 Sr 0.12 CuO4 films: Indications for antiphase ordering of the d -wave order parameter

Ofer Yuli*, Itay Asulin, Gad Koren, Oded Millo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

Using scanning tunneling spectroscopy we have investigated the spatial evolution of the anomalous c -axis zero-bias conductance peak, discovered in a previous study by our group, in epitaxial La1.88 Sr0.12 CuO4 thin films. We found an anisotropic spatial dependence of the corresponding low-energy density of states which complies with the predicted spectral features of an antiphase ordering of the d -wave order parameter within the ab plane. Such an ordering was recently suggested to account for the 1/8 anomaly in the high-temperature superconductors and the dynamical layer decoupling recently reported to occur in the transport studies of La 15/8 Ba1/8 CuO4.

Original languageAmerican English
Article number024516
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number2
DOIs
StatePublished - 22 Jan 2010

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