Current Algebra Approach to 2d Chiral Metals
- Creators
- Lee, Chao-Jung
- Mulligan, Michael
Abstract
We reinterpret Balents and Fisher's free 2d chiral metal [Phys. Rev. Lett. 76, 2782 (1996)] as a chiral U(N) Wess-Zumino-Witten model at level k=1. Here, the U(N) symmetry relates the Nāā low-energy excitations about the chiral Fermi surface. We obtain non-Fermi liquid generalizations of the free chiral metal that maintain the U(N) symmetry of the k=1 theory by taking the level to be a positive integer k>1. We calculate two-point correlation functions of the U(1) number density and current operators in these theories for general k. We find k to provide an overall rescaling of the amplitude of these correlation functions. This construction illustrates the ersatz Fermi liquid proposal of Else, Thorgren, and Senthil [Phys. Rev. X 11, 021005 (2021)].
Additional Information
Attribution 4.0 International (CC BY 4.0). We thank Mike Hermele, Shamit Kachru, Chetan Nayak, Sri Raghu, Kirill Shtengel, and Shan-Wen Tsai for useful conversations and correspondence. We also thank Pak Kau Lim and Jeffrey Teo for collaboration on related matters. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award No. DE-SC0020007.Attached Files
Submitted - 2204.05328.pdf
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Additional details
- Eprint ID
- 114785
- Resolver ID
- CaltechAUTHORS:20220517-214251753
- DE-SC0020007
- Department of Energy (DOE)
- Created
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2022-05-18Created from EPrint's datestamp field
- Updated
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2023-06-02Created from EPrint's last_modified field