The antiferromagnetic phase of the Floquet-driven Hubbard model

Nicklas Walldorf; Jens Paaske; Dante M. Kennes; Andrew J. Millis

doi:10.1103/PhysRevB.100.121110

The antiferromagnetic phase of the Floquet-driven Hubbard model

Nicklas Walldorf, Jens Paaske, Dante M. Kennes, Andrew J. Millis

Condensed Matter Physics

9 Citations (Scopus)

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.

Original language	English
Article number	121110
Journal	Physical Review B
Volume	100
Number of pages	5
ISSN	2469-9950
DOIs	https://doi.org/10.1103/PhysRevB.100.121110
Publication status	Published - 20 Sept 2019

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10.1103/PhysRevB.100.121110

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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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AU - Paaske, Jens

AU - Kennes, Dante M.

AU - Millis, Andrew J.

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N2 - 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.

AB - 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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DO - 10.1103/PhysRevB.100.121110

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VL - 100

JO - Physical Review B

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The antiferromagnetic phase of the Floquet-driven Hubbard model

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