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

doi:10.1103/PhysRevLett.78.4273

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

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171 Scopus citations

Abstract

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 H^∥_c2(45°)/H^∥_c2(0) = 0.92 at 4.2 K and is analyzed within the framework of Ginzburg-Landau theory.

Original language	English (US)
Pages (from-to)	4273-4276
Number of pages	4
Journal	Physical review letters
Volume	78
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.78.4273
State	Published - 1997

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.78.4273

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title = "Scanning tunneling microscopy observation of a square abrikosov lattice in LuNi2B2C",

abstract = "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 H∥c2(45°)/H∥c2(0) = 0.92 at 4.2 K and is analyzed within the framework of Ginzburg-Landau theory.",

author = "{De Wilde}, Y. and M. Iavarone and U. Welp and V. Metlushko and Koshelev, {A. E.} and I. Aranson and Crabtree, {G. W.} and Canfield, {P. C.}",

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doi = "10.1103/PhysRevLett.78.4273",

language = "English (US)",

volume = "78",

pages = "4273--4276",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

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T1 - Scanning tunneling microscopy observation of a square abrikosov lattice in LuNi2B2C

AU - De Wilde, Y.

AU - Iavarone, M.

AU - Welp, U.

AU - Metlushko, V.

AU - Koshelev, A. E.

AU - Aranson, I.

AU - Crabtree, G. W.

AU - Canfield, P. C.

PY - 1997

Y1 - 1997

N2 - 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 H∥c2(45°)/H∥c2(0) = 0.92 at 4.2 K and is analyzed within the framework of Ginzburg-Landau theory.

AB - 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 H∥c2(45°)/H∥c2(0) = 0.92 at 4.2 K and is analyzed within the framework of Ginzburg-Landau theory.

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JO - Physical review letters

JF - Physical review letters

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Scanning tunneling microscopy observation of a square abrikosov lattice in LuNi₂B₂C

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