Microscopic evolution of doped Mott insulators from polaronic metal to Fermi liquid

Journal Article · Fri Oct 01 04:00:00 EDT 2021 · Science

DOI:https://doi.org/10.1126/science.abe7165· OSTI ID:1982950

Koepsell, Joannis ^[1]; Bourgund, Dominik ^[1]; Sompet, Pimonpan ^[1]; Hirthe, Sarah ^[1]; Bohrdt, Annabelle ^[2]; Wang, Yao ^[3]; Grusdt, Fabian ^[4]; Demler, Eugene ^[5]; Salomon, Guillaume ^[6]; Gross, Christian ^[7]; Bloch, Immanuel ^[8]

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1. Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany.; Munich Center for Quantum Science and Technology, 80799 München, Germany.
2. Munich Center for Quantum Science and Technology, 80799 München, Germany.; Department of Physics and Institute for Advanced Study, Technical University of Munich, 85748 Garching, Germany.
3. Department of Physics, Harvard University, Cambridge, MA 02138, USA.; Department of Physics and Astronomy, Clemson University, Clemson, SC 29631, USA.
4. Munich Center for Quantum Science and Technology, 80799 München, Germany.; Fakultät für Physik, Ludwig-Maximilians-Universität, 80799 München, Germany.
5. Department of Physics, Harvard University, Cambridge, MA 02138, USA.
6. Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany.; Munich Center for Quantum Science and Technology, 80799 München, Germany.; Institut für Laserphysik, Universität Hamburg, 22761 Hamburg, Germany.; The Hamburg Centre for Ultrafast Imaging, Universität Hamburg, 22761 Hamburg, Germany.
7. Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany.; Munich Center for Quantum Science and Technology, 80799 München, Germany.; Physikalisches Institut, Eberhard Karls Universität Tübingen, 72076 Tübingen, Germany.
8. Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany.; Munich Center for Quantum Science and Technology, 80799 München, Germany.; Fakultät für Physik, Ludwig-Maximilians-Universität, 80799 München, Germany.

From polarons to a Fermi liquid

Superconductivity in the cuprates emerges by doping an antiferromagnetic “parent” state with holes or electrons. With increased doping, antiferromagnetism gives way to unconventional superconductivity, and the system eventually becomes a Fermi liquid. Koepsellet al. simulated this progression using cold, strongly interacting lithium-6 atoms trapped in an optical lattice. Although the equivalent ordered phases are not yet reachable at the experimentally available temperatures, the researchers were able to measure multipoint spin and hole correlations over a wide range of hole doping. The evolution of these correlators with doping revealed a crossover from a polaronic regime to a Fermi liquid. —JS

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1982950
• Journal Information: Science, Journal Name: Science Journal Issue: 6563 Vol. 374; ISSN 0036-8075
• Publisher: AAAS
• Country of Publication: United States
• Language: English

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