De Haas-van Alphen effect and Fermi surface properties of single crystal CrB2

Abstract

We report the angular dependence of three distinct de Haas-van Alphen (dHvA) frequencies of the torque magnetization in the itinerant antiferromagnet CrB2 at temperatures down to 0.3K and magnetic fields up to 14T. Comparison with the calculated Fermi surface of nonmagnetic CrB2 suggests that two of the observed dHvA oscillations arise from electron-like Fermi surface sheets formed by bands with strong B-px,y character which should be rather insensitive to exchange splitting. The measured effective masses of these Fermi surface sheets display strong enhancements of up to a factor of two over the calculated band masses which we attribute to electron-phonon coupling and electronic correlations. For the temperature and field range studied, we do not observe signatures reminiscent of the heavy d-electron bands expected for antiferromagnetic CrB2. In view that the B-p bands are at the heart of conventional high-temperature superconductivity in the isostructural MgB2, we consider possible implications of our findings for nonmagnetic CrB2 and an interplay of itinerant antiferromagnetism with superconductivity.

arXiv comment8 pages, 4 figures

References in corpus (11)

• Superconductivity of metallic boron in MgB_2
• Beyond Eliashberg superconductivity in MgB2: anharmonicity, two-phonon scattering, and multiple gaps
• Two-gap superconductivity in MgB${}_2$: clean or dirty?
• Numerical extraction of de Haas - van Alphen frequencies from calculated band energies
• de Haas-van Alphen effect in single crystal MgB_2
• Determination of the Fermi Surface of MgB${}_2$ by the de Haas-van Alphen effect
• Interpretation of the de Haas - van Alphen experiments in MgB2
• Magnetic groundstate and Fermi surface of bcc Eu
• Nesting of electron and hole Fermi surfaces in non-superconducting BaFe_2P_2
• Using the de Haas-van Alphen effect to map out the closed three-dimensional Fermi surface of natural graphite
• de Haas-van Alphen effect investigations of the electronic structure of pure and aluminum-doped MgB_2

Cited by in corpus (6)

• Antiferromagnetic spintronics
• Low-temperature properties of single-crystal CrB${}_2$
• Compositional Studies of Metals with Complex Order by means of the Optical Floating-Zone Technique
• First Principles Study of Electronic Structure and Fermi Surface in Rare-earth Filled Skutterudites RPt4Ge12
• Fermi surface determination from momentum density projections
• Incommensurate magnetic ordering in CrB${}_2$