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Related Concept Videos

Hybridization of Atomic Orbitals I03:24

Hybridization of Atomic Orbitals I

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Valence Bond Theory02:42

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Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
¹H NMR: Long-Range Coupling01:27

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The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
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Anisotropic multiband many-body interactions in LuNi2B2C.

B Bergk1, V Petzold, H Rosner

  • 1Hochfeld-Magnetlabor Dresden (HLD), Forschungszentrum Dresden-Rossendorf, D-01314 Dresden, Germany.

Physical Review Letters
|July 23, 2008
PubMed
Summary
This summary is machine-generated.

We studied the superconductor LuNi2B2C using de Haas-van Alphen measurements. Our findings reveal anisotropic multiband superconductivity, with varying mass enhancement factors across different electronic bands.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Superconductivity

Background:

  • Borocarbide compounds are known for their unique superconducting properties.
  • Understanding the electronic structure is crucial for elucidating superconductivity mechanisms.

Purpose of the Study:

  • To investigate the superconducting properties of the nonmagnetic borocarbide LuNi2B2C.
  • To determine the mass-enhancement factors and their wave-vector dependence.
  • To analyze the anisotropic multiband character of superconductivity.

Main Methods:

  • Comprehensive de Haas-van Alphen (dHvA) measurements.
  • Analysis of angular-dependent effective masses.
  • Full-potential density functional calculations.

Main Results:

  • Determined mass-enhancement factors (lambda) for different electronic bands.
  • Revealed wave-vector dependence of these factors.
  • Demonstrated the anisotropic multiband nature of superconductivity in LuNi2B2C.

Conclusions:

  • Superconductivity in LuNi2B2C exhibits significant anisotropy.
  • The electronic band structure plays a critical role in the superconducting behavior.
  • This study provides detailed insights into the microscopic origins of superconductivity in this material.