Spin-imbalance in a 2D Fermi-Hubbard system
Abstract
Strongly interacting fermions in a two-dimensional lattice form a checkerboard pattern, with spins of opposite directions occupying neighboring sites of the lattice. When an external magnetic field is applied, the situation becomes more complicated—should the spins align with the field, or try to preserve the checkerboard order? Brown et al. studied this problem using 6 Li atoms in an optical lattice with unequal numbers of two spin components; the imbalance between the two played the role of an effective magnetic field. With the field applied, the checkerboard pattern correlations of the spin component perpendicular to the field became stronger than those of the spin component parallel to the field, indicating that the system was approaching the so-called canted antiferromagnetic state.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 29, 2017
- Source ID
- 10.1126/science.aam7838
Entities
People
- David A. Huse
- Debayan Mitra
- Ehsan Khatami
- Elmer Guardado-Sanchez
- Nandini Trivedi
- Peter Schauss
- Peter T Brown
- Stanimir S Kondov
- Thereza Paiva
- Waseem S Bakr
Organizations
- Air Force Office of Scientific Research
- Alfred P. Sloan Foundation
- David and Lucile Packard Foundation
- Federal University of Rio de Janeiro
- Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
- Instituto Nacional de Ciência e Tecnologia de Informação Quântica
- National Council for Scientific and Technological Development
- National Science Foundation
- Ohio State University
- Princeton University
- San José State University
- United States Department of Defense