Scanning tunneling microscopy observation of a square abrikosov lattice in LuNi2B2C

Y. De Wilde, M. Iavarone, U. Welp, V. Metlushko, A. E. Koshelev, I. Aranson, G. W. Crabtree, P. C. Canfield

Research output: Contribution to journalArticlepeer-review

168 Scopus citations


We present scanning tunneling microscopy measurements of the (001) surface of a LuNi2B2C borocarbide single crystal at 4.2 K. In zero field, the conductance versus voltage characteristics recorded at various locations on the sample reproducibly provide a gap value of 2.2 meV. In a magnetic field of 1.5 and 0.375 T, the recordings of the conductance as a function of position reveal a regular square vortex lattice tilted by 45° with respect to the crystalline a axis. This unusual result is correlated with an in-plane anisotropy of the upper critical field Hc2(45°)/Hc2(0) = 0.92 at 4.2 K and is analyzed within the framework of Ginzburg-Landau theory.

Original languageEnglish (US)
Pages (from-to)4273-4276
Number of pages4
JournalPhysical review letters
Issue number22
StatePublished - 1997

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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