Spin-zero anomaly in the magnetic quantum oscillations of a two-dimensional metal
Strongly Correlated Electrons
2008-08-27 v1 Other Condensed Matter
Abstract
We report on an anomalous behavior of the spin-splitting zeros in the de Haas-van Alphen (dHvA) signal of a quasi-two-dimensional organic superconductor. The zeros as well as the angular dependence of the amplitude of the second harmonic deviate remarkably from the standard Lifshitz-Kosevich (LK) prediction. In contrast, the angular dependence of the fundamental dHvA amplitude as well as the spin-splitting zeros of the Shubnikov-de Haas signal follow the LK theory. We can explain this behavior by small chemical-potential oscillations and find a very good agreement between theory and experiment. A detailed wave-shape analysis of the dHvA signal corroborates the existence of an oscillating chemical potential.
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Cite
@article{arxiv.cond-mat/0412202,
title = {Spin-zero anomaly in the magnetic quantum oscillations of a two-dimensional metal},
author = {J. Wosnitza and V. M. Gvozdikov and J. Hagel and P. J. Meeson and J. A. Schlueter and R. W. Winter and G. L. Gard},
journal= {arXiv preprint arXiv:cond-mat/0412202},
year = {2008}
}