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 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 languageEnglish
Article number121110
JournalPhysical Review B
Volume100
Issue number12
Number of pages5
ISSN1098-0121
DOIs
Publication statusPublished - 2019

Cite this

Walldorf, Nicklas ; Kennes, Dante M. ; Paaske, Jens ; Millis, Andrew J. / The antiferromagnetic phase of the Floquet-driven Hubbard model. In: Physical Review B. 2019 ; Vol. 100, No. 12.
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The antiferromagnetic phase of the Floquet-driven Hubbard model. / Walldorf, Nicklas; Kennes, Dante M.; Paaske, Jens; Millis, Andrew J.

In: Physical Review B, Vol. 100, No. 12, 121110, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

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AU - Kennes, Dante M.

AU - Paaske, Jens

AU - Millis, Andrew J.

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Y1 - 2019

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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JO - Physical Review B (Condensed Matter and Materials Physics)

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SN - 1098-0121

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