Erratum: “Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO3” [Appl. Phys. Lett. <b>100</b>, 242904 (2012)]

Sheu, Yu-Miin; Trugman, S. A.; Park, Y. S.; Lee, S.; Yi, Hyunjung; Cheong, Sang‐Wook; Jia, Q. X.; Taylor, Antoinette J.; Prasankumar, R. P.

doi:10.1063/1.4821741

Cited by 4 publications

(4 citation statements)

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“…The time-resolved SHG (TR-SHG) can directly access the FE polarization (or equivalently the spiral-spin order here), spanning a wide range of timescale [15,[28][29][30]. Time-resolved research is practical for tracing dynamics of various order parameters [6,[30][31][32][33][34][35][36]. In addition, the capability of generating highly non-equilibrated states with ultrashort pulses may lead to discovery of hidden states [37][38][39], which would not be realized through conventional thermodynamic processes.…”

Section: (B)mentioning

confidence: 99%

Photocreating supercooled spiral-spin states in a multiferroic manganite

2016

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We demonstrate that dynamics of the ab-spiral-spin order in a magnetoelectric multiferroic Eu0.55Y0.45MnO3 can be unambiguously probed through optical second harmonic signals, generated via the spin-induced ferroelectric polarization. In the case of relatively weak photoexcitation, the ferroelectric and the spiral-spin order remains interlocked, both relaxing through spin-lattice relaxation in the non-equilibrium state. When the additional optical pulse illuminating sample is intense enough to induced a local phase transition thermally, the system creates a metastable state of the bc-spiral-spin order (with the electric polarization P //c) via supercooling across the first-order phase transition between ab-and bc-spiral. The supercooled state of bc-spiral spin is formed in the thermodynamical ground state of ab-spiral (P //a), displaying a prolonged lifetime with strong dependence on the magnetic field along the a-axis. The observed photo-switching between the two distinct multiferroic states sheds light on novel photoinduced phenomena in spiral-spin multiferroics.

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Section: (B)mentioning

confidence: 99%

Photocreating supercooled spiral-spin states in a multiferroic manganite

2016

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“…[ 30 ] In addition, the carrier decay dynamics can also be modulated by coupling to the spins and optically excited phonons. [ 31,32 ] Despite the outstanding photoresponse and exchange interactions in BiFeO 3 , the direct impact of electron‐phonon coupling on the spatial and temporal charge carrier transport properties is still a subject to be investigated currently. Understanding how and to what extent electron‐phonon coupling can alter the carrier transport behavior in space and time is important for the development of high‐efficiency electronic devices and may even enable new ways to manipulate electrons and phonons for novel device applications.…”

Section: Introductionmentioning

confidence: 99%

Strong Electron‐Phonon Coupling Mediates Carrier Transport in BiFeO₃

Ou,

Peng,

Chu

et al. 2023

Advanced Science

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The electron-phonon interaction is known as one of the major mechanisms determining electrical and thermal properties. In particular, it alters the carrier transport behaviors and sets fundamental limits to carrier mobility. Establishing how electrons interact with phonons and the resulting impact on the carrier transport property is significant for the development of high-efficiency electronic devices. Here, carrier transport behavior mediated by the electron-phonon coupling in BiFeO 3 epitaxial thin films is directly observed. Acoustic phonons are generated by the inverse piezoelectric effect and coupled with photocarriers. Via the electron-phonon coupling, doughnut shape carrier distribution has been observed due to the coupling between hot carriers and phonons. The hot carrier quasi-ballistic transport length can reach 340 nm within 1 ps. The results suggest an effective approach to investigating the effects of electron-phonon interactions with temporal and spatial resolutions, which is of great importance for designing and improving electronic devices.

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“…[ 15–21 ] Experimentally, research on the ultrafast dynamics of ferroelectrics has mainly focused on ultrafast polarization dynamics and modulation, [ 22,23 ] photopolarization, and mechanics, [ 24,25 ] phase transition, [ 26 ] electron–phonon/phonon–polariton/electric–magnetic coupling, [ 27,28 ] carrier dynamics and radiative recombination. [ 29 ] However, there are few types of ferroelectric [ 7 ] studies investigating the ECE through EFP. Herein, we select traditional inorganic ferroelectric materials BaTiO 3 (BTO) bulk and Ba (1− x ) Sr x TiO 3 (BST) solid solution as the research objects, combined with the modified phase‐field method to explore the cooling of ferroelectrics at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Designing Ultrafast Cooling Rate for Room Temperature Electrocaloric Effects by Phase‐Field Simulations

Shao

Shi

Wang

et al. 2022

Advcd Theory and Sims

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Due to miniaturization and environmental friendliness, the electrocaloric effect is expected to be applied to refrigerate electronic chips and microdevices. Unlike the conventional electrocaloric effect that focuses on the temperature change, the ultrafast cooling rate is crucial to heat transport in future device units. In this work, controlling the duration of ultrafast electric field pulse on a nanosecond scale (the frequency ∼ GHz), the instant electrocaloric effect is realized in BaTiO 3 and Ba (1−x) Sr x TiO 3 systems based on the modified phase-field method. A significant ultrafast cooling rate of 10 8 K s −1 can be achieved due to the application of ultrafast electric field pulse within nanoseconds, which proved to be more efficient than the constant electric field. Furthermore, multiple electric field pulses are designed to realize the cyclic ultrafast cooling. This study provides the fundamental theoretical guidance for ultrafast cooling in solid-state refrigeration.

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Erratum: “Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO3” [Appl. Phys. Lett. 100, 242904 (2012)]

Cited by 4 publications

References 1 publication

Photocreating supercooled spiral-spin states in a multiferroic manganite

Photocreating supercooled spiral-spin states in a multiferroic manganite

Strong Electron‐Phonon Coupling Mediates Carrier Transport in BiFeO₃

Designing Ultrafast Cooling Rate for Room Temperature Electrocaloric Effects by Phase‐Field Simulations

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Erratum: “Ultrafast carrier dynamics and radiative recombination in multiferroic BiFeO3” [Appl. Phys. Lett. 100, 242904 (2012)]

Cited by 4 publications

References 1 publication

Photocreating supercooled spiral-spin states in a multiferroic manganite

Photocreating supercooled spiral-spin states in a multiferroic manganite

Strong Electron‐Phonon Coupling Mediates Carrier Transport in BiFeO3

Designing Ultrafast Cooling Rate for Room Temperature Electrocaloric Effects by Phase‐Field Simulations

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Product

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Strong Electron‐Phonon Coupling Mediates Carrier Transport in BiFeO₃