Journal
PHYSICAL REVIEW B
Volume 82, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.045123
Keywords
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Funding
- Deutsche Forschungsgemeinschaft [FR 2627/1-1]
- NSF [DMR-0757145]
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In this paper we investigate magneto-oscillations in the specific heat and the magnetization of nonrelativistic fermions coupled to a fluctuating U(1) gauge field. This model obtains as an effective model for the under-doped cuprates realizing a so-called algebraic charge liquid, which is a true non-Fermi-liquid state. Our study is driven by very recent observations of quantum oscillations in the underdoped cuprates. We calculate corrections to the standard Lifshitz-Kosevich expression due to the internal gauge degree of freedom for the oscillation amplitude. We perform this calculation in the dirty limit in a model with N species of fermions. The N ->infinity result corresponds to the well-known Fermi-liquid result reproducing the Lifshitz-Kosevich result. We capture the effect of the gauge field on the oscillation amplitude to Gaussian accuracy controlled in the small parameter 1/N. Our main finding is the presence of qualitative and quantitative differences compared to standard Fermi-liquid theory.
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