Zero-bias anomaly in CrO2 junctions

A. Sokolov, C. S. Yang, L. Yuan, S. H. Liou, Ruihua Cheng, H. K. Jeong, T. Komesu, B. Xu, C. N. Borca, P. A. Dowben, B. Doudin

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

CrO2 thin films, with crystallites of several microns size, provide the opportunity for the investigation of the intergrain tunneling between a few crystals separated by a 1-2 nm thick Cr2O3 film. A pronounced zero-bias anomaly of the conductance is found at low temperatures. Combined photoemission and inverse photoemission temperature-dependent studies confirm the occurrence of Coulomb blockade. For the strong-tunneling case (R ≪ RQ = h/2e2), the magnetoresistance decreases strongly with bias. For the weak-tunneling case (R ≫ RQ), the magnetoresistance decreases by a factor two with increasing bias, as predicted by a co-tunneling model.

Original languageEnglish (US)
Pages (from-to)448-454
Number of pages7
JournalEurophysics Letters
Volume58
Issue number3
DOIs
StatePublished - 2002

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Zero-bias anomaly in CrO<sub>2</sub> junctions'. Together they form a unique fingerprint.

Cite this