Bad metallic transport in a cold atom Fermi-Hubbard system
Abstract
Much can be learned about the nature of a solid from how charge and spin propagate through it. Transport experiments can also be performed in quantum simulators such as cold atom systems, in which individual atoms can be imaged using quantum microscopes. Now, two groups have investigated transport in the so-called Fermi-Hubbard model using a two-dimensional optical lattice filled with one fermionic atom per site (see the Perspective by Brantut). Moving away from half-filling to enable charge transport, Brown et al. found that the resistivity had a linear temperature dependence, not unlike that seen in the strange metal phase of cuprate superconductors. In a complementary study on spin transport, Nichols et al. observed spin diffusion driven by superexchange coupling.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 25, 2019
- Source ID
- 10.1126/science.aat4134
Entities
People
- Alexis Reymbaut
- André-Marie Tremblay
- Charles-David Hébert
- David A. Huse
- Debayan Mitra
- Elmer Guardado-Sanchez
- Jure Kokalj
- Peter Schauss
- Peter T Brown
- Reza Nourafkan
- Simon Bergeron
- Waseem S Bakr
Organizations
- Air Force Office of Scientific Research
- Alfred P. Sloan Foundation
- Canada First Research Excellence Fund
- Canadian Institute for Advanced Research
- David and Lucile Packard Foundation
- Fonds de Recherche du Québec Nature et technologies
- Jožef Stefan Institute
- National Science Foundation
- Natural Sciences and Engineering Research Council
- Princeton University
- Slovenian Research and Innovation Agency
- United States Department of Defense
- University of Ljubljana
- University of Sherbrooke