Compressible Quantum Liquid with Vanishing Drude Weight
We explore the possibility of quantum liquids that are compressible but have vanishing dc conductivity in the absence of disorder. We show that the composite Fermi liquid emerging from strong interaction in a generic Chern band has zero Drude weight, in stark contrast to normal Fermi liquids. Our Letter establishes the absence of Drude weight as the defining property of the composite Fermi liquid phase, which distinguishes it from the Fermi liquid or other types of non-Fermi liquids. Our findings point to a possibly wide class of gapless quantum phases with unexpected transport and optical properties.
Authors
- Ahmed Abouelkomsan (ORCID: https://orcid.org/0000-0002-4787-3357)
- Ady Stern (ORCID: https://orcid.org/0000-0002-9493-268X)
- Nisarga Paul (ORCID: https://orcid.org/0000-0001-9044-3531)
- Liang Fu (ORCID: https://orcid.org/0000-0002-8803-1017)
Institutions
- Weizmann Institute of Science (IL)
- Massachusetts Institute of Technology (US)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2025-04-29
- DOI
- https://doi.org/10.1103/physrevlett.134.176501
- Citations
- 4
- Primary Topic
- Advanced Mathematical Physics Problems
- Type
- article
- Field-Weighted Citation Impact
- 14.77
Funders
- Simons Foundation
- Deutsche Forschungsgemeinschaft
- Knut och Alice Wallenbergs Stiftelse
- Horizon 2020 Framework Programme
- Air Force Office of Scientific Research
- H2020 European Research Council