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2. Subpicosecond Optical Stress Generation in Multiferroic BiFeO3

Author

Lee, Hyeon Jun, primary, Ahn, Youngjun, additional, Marks, Samuel D., additional, Sri Gyan, Deepankar, additional, Landahl, Eric C., additional, Lee, Jun Young, additional, Kim, Tae Yeon, additional, Unithrattil, Sanjith, additional, Chun, Sae Hwan, additional, Kim, Sunam, additional, Park, Sang-Youn, additional, Eom, Intae, additional, Adamo, Carolina, additional, Schlom, Darrell G., additional, Wen, Haidan, additional, Lee, Sooheyong, additional, Jo, Ji Young, additional, and Evans, Paul G., additional

Published
2022
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3. Subpicosecond Optical Stress Generation in Multiferroic BiFeO3.

Author

Lee, Hyeon Jun, Ahn, Youngjun, Marks, Samuel D., Sri Gyan, Deepankar, Landahl, Eric C., Lee, Jun Young, Kim, Tae Yeon, Unithrattil, Sanjith, Chun, Sae Hwan, Kim, Sunam, Park, Sang-Youn, Eom, Intae, Adamo, Carolina, Schlom, Darrell G., Wen, Haidan, Lee, Sooheyong, Jo, Ji Young, and Evans, Paul G.

Published
2022
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4. Mesoscopic Elastic Distortions in GaAs Quantum Dot Heterostructures

Author

Pateras, Anastasios, primary, Park, Joonkyu, additional, Ahn, Youngjun, additional, Tilka, Jack A., additional, Holt, Martin V., additional, Reichl, Christian, additional, Wegscheider, Werner, additional, Baart, Timothy A., additional, Dehollain, Juan Pablo, additional, Mukhopadhyay, Uditendu, additional, Vandersypen, Lieven M. K., additional, and Evans, Paul G., additional

Published
2018
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5. Ultrafast Optically Induced Perturbation of Oxygen Octahedral Rotations in Multiferroic BiFeO3Thin Films

Author

Li, Ni, Lee, Hyeon Jun, Sri Gyan, Deepankar, Ahn, Youngjun, Landahl, Eric C., Carnis, Jerome, Lee, Jun Young, Kim, Tae Yeon, Unithrattil, Sanjith, Jo, Ji Young, Chun, Sae Hwan, Kim, Sunam, Park, Sang-Youn, Eom, Intae, Adamo, Carolina, Li, Sabrina J., Kaaret, Jeffrey Z., Schlom, Darrell G., Wen, Haidan, Benedek, Nicole A., and Evans, Paul G.

Abstract

The functional properties of complex oxides, including magnetism and ferroelectricity, are closely linked to subtle structural distortions. Ultrafast optical excitations provide the means to manipulate structural features and ultimately to affect the functional properties of complex oxides with picosecond-scale precision. We report that the lattice expansion of multiferroic BiFeO3following above-bandgap optical excitation leads to distortion of the oxygen octahedral rotation (OOR) pattern. The continuous coupling between OOR and strain was probed using time-resolved X-ray free-electron laser diffraction with femtosecond time resolution. Density functional theory calculations predict a relationship between the OOR and the elastic strain consistent with the experiment, demonstrating a route to employing this approach in a wider range of systems. Ultrafast control of the functional properties of BiFeO3thin films is enabled by this approach because the OOR phenomena are related to ferroelectricity, and via the Fe–O–Fe bond angles, the superexchange interaction between Fe atoms.

Published
2024
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6. Ultrafast Optically Induced Perturbation of Oxygen Octahedral Rotations in Multiferroic BiFeO 3 Thin Films.

Author

Li N, Lee HJ, Sri Gyan D, Ahn Y, Landahl EC, Carnis J, Lee JY, Kim TY, Unithrattil S, Jo JY, Chun SH, Kim S, Park SY, Eom I, Adamo C, Li SJ, Kaaret JZ, Schlom DG, Wen H, Benedek NA, and Evans PG

Abstract

The functional properties of complex oxides, including magnetism and ferroelectricity, are closely linked to subtle structural distortions. Ultrafast optical excitations provide the means to manipulate structural features and ultimately to affect the functional properties of complex oxides with picosecond-scale precision. We report that the lattice expansion of multiferroic BiFeO 3 following above-bandgap optical excitation leads to distortion of the oxygen octahedral rotation (OOR) pattern. The continuous coupling between OOR and strain was probed using time-resolved X-ray free-electron laser diffraction with femtosecond time resolution. Density functional theory calculations predict a relationship between the OOR and the elastic strain consistent with the experiment, demonstrating a route to employing this approach in a wider range of systems. Ultrafast control of the functional properties of BiFeO 3 thin films is enabled by this approach because the OOR phenomena are related to ferroelectricity, and via the Fe-O-Fe bond angles, the superexchange interaction between Fe atoms.

Published
2024
Full Text
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