The temperature dependence of the photoinduced soft mode in Sn2P2S6 crystal

Brekhov, Kirill; Ilyin, N. A.; Мишина, Е. Д.; Prudkovskii, P. A.; Китаева, Г. Х.

doi:10.1142/s0217979219500619

Cited by 6 publications

(3 citation statements)

References 20 publications

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“…The closest successful result to date, which involved reversible polarization change, was achieved by Mankowsky et al in their work on lithium niobate . Other studies − have also explored the selective excitation of lattice vibrations under ultrashort optical or THz pulses, which are essential for achieving practical polarization switching. The absence of a predictive model poses a significant obstacle to experimentally observing ultrafast switching of electric polarization.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Polarization Switching in BaTiO₃ Nanomaterials: Combined Density Functional Theory and Coupled Oscillator Study

Zhilyaev,

Brekhov,

Mishina

et al. 2024

ACS Omega

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The challenge of achieving ultrafast switching of electric polarization in ferroelectric materials remains unsolved as there is no experimental evidence of such switching to date. In this study, we developed an enhanced model that describes switching within a twodimensional space of generalized coordinates at THz pulses. Our findings indicate that stable switching in barium titanate cannot be achieved through a single linearly polarized pulse. When the intensity of the linearly polarized pulse reaches a certain threshold, the sample experiences depolarization but not stable switching. Our study also reveals that phonon friction plays a minor role in the switching dynamics and provides an estimate of the optimal parameters for the perturbing pulse with the lowest intensity that results in the depolarization of an initially polarized sample.

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Section: Introductionmentioning

confidence: 99%

Ultrafast Polarization Switching in BaTiO₃ Nanomaterials: Combined Density Functional Theory and Coupled Oscillator Study

Zhilyaev,

Brekhov,

Mishina

et al. 2024

ACS Omega

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“…At present, there are some theoretical [ 14 , 15 , 16 , 17 , 18 ] and experimental works that show the possibility of influencing the ferroelectric order parameter with optical [ 19 , 20 , 21 ] or THz pulses. The THz-induced change in polarization can be directly measured as a dynamical polar ion displacement with time-resolved X-ray diffraction [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Resonant Excitation of the Ferroelectric Soft Mode by a Narrow-Band THz Pulse

Brekhov

Bilyk²,

Овчинников

et al. 2023

Nanomaterials

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This study investigates the impact of narrow-band terahertz pulses on the ferroelectric order parameter in Ba0.8Sr0.2TiO3 films on various substrates. THz radiation in the range of 1–2 THz with the pulse width of about 0.15 THz was separated from a broadband pulse with the interference technique. The 375 nm thick BST film on a MgO (001) substrate exhibits enhanced THz-induced second harmonic generation when excited by THz pulses with a central frequency of 1.6 THz, due to the resonant excitation of the soft phonon mode. Conversely, the BST film on a Si (001) substrate shows no enhancement, due to its polycrystalline state. The 800 nm thick BST film on a MgO (111) substrate demonstrates the maximum of a second harmonic generation signal when excited by THz pulses at 1.8 THz, which is close to the soft mode frequency for the (111) orientation. Notably, the frequency spectrum of the BST/MgO (111) film reveals peaks at both the fundamental and doubled frequencies, and their intensities depend, respectively, linearly and quadratically on the THz pulse electric field strength.

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“…Although this possibility has garnered significant attention, it has not yet been observed experimentally.The closest successful result to date, which involved reversible polarization change, was achieved by Mankowsky et al in their work on lithium niobate [4]. Other studies [5][6][7][8][9][10] have also explored the selective excitation of lattice vibrations under ultra-short optical or THz pulses, which is essential for achieving practical polarization switching.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Ultrafast Polarization Switching in BaTiO3

Zhilyaev¹,

Brekhov²,

Tantardini³

et al. 2023

Preprint

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The challenge of achieving ultrafast switching of electric polarization in ferroelectric materials remains unsolved, as there is no experimental evidence of such switching to date. In this study, we have developed an enhanced model that describes switching within a two-dimensional space of generalized coordinates. Our findings indicate that stable switching in barium titanate cannot be achieved through a single linearly polarized pulse. When the intensity of the linearly polarized pulse reaches a certain threshold, the sample experiences depolarization, but not stable switching. Our study also reveals that phonon friction plays a minor role in the switching dynamics and provides an estimate of the optimal parameters of the perturbing pulse with the lowest intensity that results in depolarization of an initially depolarized sample.

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The temperature dependence of the photoinduced soft mode in Sn₂P₂S₆ crystal

Cited by 6 publications

References 20 publications

Ultrafast Polarization Switching in BaTiO₃ Nanomaterials: Combined Density Functional Theory and Coupled Oscillator Study

Ultrafast Polarization Switching in BaTiO₃ Nanomaterials: Combined Density Functional Theory and Coupled Oscillator Study

Resonant Excitation of the Ferroelectric Soft Mode by a Narrow-Band THz Pulse

Simulation of Ultrafast Polarization Switching in BaTiO<sub>3</sub>

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The temperature dependence of the photoinduced soft mode in Sn2P2S6 crystal

Cited by 6 publications

References 20 publications

Ultrafast Polarization Switching in BaTiO3 Nanomaterials: Combined Density Functional Theory and Coupled Oscillator Study

Ultrafast Polarization Switching in BaTiO3 Nanomaterials: Combined Density Functional Theory and Coupled Oscillator Study

Resonant Excitation of the Ferroelectric Soft Mode by a Narrow-Band THz Pulse

Simulation of Ultrafast Polarization Switching in BaTiO<sub>3</sub>

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Product

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The temperature dependence of the photoinduced soft mode in Sn₂P₂S₆ crystal

Ultrafast Polarization Switching in BaTiO₃ Nanomaterials: Combined Density Functional Theory and Coupled Oscillator Study

Ultrafast Polarization Switching in BaTiO₃ Nanomaterials: Combined Density Functional Theory and Coupled Oscillator Study