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arXiv · 1809.08607

The antiferromagnetic phase of the Floquet-driven Hubbard model

Nicklas Walldorf·Dante M. Kennes·Jens Paaske·Andrew J. Millis
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Abstract

A saddle point plus fluctuations 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 non-thermal 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 non-equilibrium drive.

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Nicklas Walldorf, Dante M. Kennes, Jens Paaske, Andrew J. Millis. 2019-09-23. The antiferromagnetic phase of the Floquet-driven Hubbard model. https://doi.org/10.1103/physrevb.100.121110

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