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The antiferromagnetic phase of the Floquet-driven Hubbard model

Nicklas Walldorf, Dante M. Kennes, Jens Paaske, and Andrew J. Millis
Phys. Rev. B 100, 121110(R) – Published 20 September 2019

Abstract

A saddle point plus fluctuation analysis of the periodically driven half-filled two-dimensional Hubbard model is performed. For drive frequencies below the equilibrium gap, we find discontinuous transitions to time-dependent solutions. A highly excited, generically nonthermal distribution of magnons occurs even for drive frequencies far above the gap. Above a critical drive amplitude, the low-energy magnon distribution diverges as the frequency tends to zero and antiferromagnetism is destroyed, revealing the generic importance of collective mode excitations arising from a nonequilibrium drive.

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  • Received 1 October 2018
  • Revised 15 November 2018

DOI:https://doi.org/10.1103/PhysRevB.100.121110

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Nicklas Walldorf1, Dante M. Kennes2, Jens Paaske3, and Andrew J. Millis4,5

  • 1Center for Nanostructured Graphene (CNG), Department of Physics, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
  • 2Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, D-14195 Berlin, Germany
  • 3Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen, Denmark
  • 4Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027, USA
  • 5Center for Computational Quantum Physics, Flatiron Institute, 162 5th Avenue, New York, New York 10010, USA

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Issue

Vol. 100, Iss. 12 — 15 September 2019

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