Interplay of size and Landau quantizations in the de Haas-van Alphen oscillations of metallic nanowires

Details Interplay of size and Landau quantizations in the de Haas-van Alphen oscillations of metallic nanowires Interplay of size and Landau quantizations in the de Haas-van Alphen oscillations of metallic nanowires

2007-05-09

arxiv.org/abs/0705.1303v2

Physical Review B 76, 155417 (2007) with some typos fixed

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Title changed, paper streamlined on suggestion of referrees, typos corrected, numerical error in figs 2 and 3 corrected and fi

Scientific paper

10.1103/PhysRevB.76.155417

We examine the interplay between size quantization and Landau quantization in the De Haas-Van Alphen oscillations of clean, metallic nanowires in a longitudinal magnetic field for `hard' boundary conditions, i.e. those of an infinite round well, as opposed to the `soft' parabolically confined boundary conditions previously treated in Alexandrov and Kabanov (Phys. Rev. Lett. {\bf 95}, 076601 (2005) (AK)). We find that there exist {\em two} fundamental frequencies as opposed to the one found in bulk systems and the three frequencies found by AK with soft boundary counditions. In addition, we find that the additional `magic resonances' of AK may be also observed in the infinite well case, though they are now damped. We also compare the numerically generated energy spectrum of the infinite well potential with that of our analytic approximation, and compare calculations of the oscillatory portions of the thermodynamic quantities for both models.

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