The influence of many-body interactions on the de Haas-van Alphen effect
| Autor: | A Wasserman, M Springford |
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| Rok vydání: | 1996 |
| Předmět: | |
| Zdroj: | Advances in Physics. 45:471-503 |
| ISSN: | 1460-6976 0001-8732 |
| DOI: | 10.1080/00018739600101547 |
| Popis: | The de Haas-van Alphen (dHvA) effect, or Landau quantum oscillatory magnetization of metals, has been widely used to explore the single-particle aspects of electrons in metals with the aim of determining their Fermi surfaces. Its role in studying many-body effects in metals is less familiar, even though the influence of such interactions is well known. We present a general field-theoretic approach to this problem which shows that the paradigm for understanding the influence of many-body interactions in the dHvA effect should be shifted from the intuitively reasonable but potentially misleading arguments based on the electron self-energy on the real energy axis to an analysis of the self-energy along the imaginary energy axis. When viewed in this way, the dHvA effect assumes the role of a many-body self-energy filter in which the real part of the self-energy renormalizes the dHvA frequency while the imaginary part renormalizes independently the dHvA amplitude. We obtain a general theory for the dH... |
| Databáze: | OpenAIRE |
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