Recent Developments in Non-Fermi Liquid Theory
By Sung-Sik Lee. 2017
221 citations recorded by the source corpus.
Non-Fermi liquids are unconventional metals whose physical properties deviate qualitatively from those of noninteracting fermions due to strong quantum fluctuations near Fermi surfaces. They arise when metals are subject to singular interactions mediated by soft collective modes. In the absence of well-defined quasiparticles, universal physics of non-Fermi liquids is captured by interacting field theories which replace Landau Fermi liquid theory. However, it has been difficult to understand their universal low-energy physics due to a lack of theoretical methods that take into account strong quantum fluctuations in the presence of abundant low-energy degrees of freedom. In this review, we discuss two approaches that have been recently developed for non-Fermi liquid theory with emphasis on two space dimensions. The first is a perturbative scheme based on a dimensional regularization, which achieves a controlled access to the low-energy physics by tuning the codimension of Fermi surface. The second is a nonp...
Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/90a7b15c92544326ca256b153bdfb40770b2461e
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In Condensed Matter Physics
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Generalized Symmetries in Condensed Matter (2022, unknown): “(131) gives something like a symmetry-based understanding of both Fermi liquids and a large class of non-Fermi liquids (for a review of the latter, see (132)).”
- Translationally Invariant Non-Fermi-Liquid Metals with Critical Fermi Surfaces: Solvable Models (2018, background): “Much progress has been made in understanding the properties of this class of metallic quantum-critical points in recent years [13].”