S
Sahar Saremi
Researcher at University of California, Berkeley
Publications - 33
Citations - 1633
Sahar Saremi is an academic researcher from University of California, Berkeley. The author has contributed to research in topics: Ferroelectricity & Dielectric. The author has an hindex of 19, co-authored 31 publications receiving 1010 citations. Previous affiliations of Sahar Saremi include Lawrence Berkeley National Laboratory.
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Journal ArticleDOI
Observation of room-temperature polar skyrmions
Sujit Das,Yun-Long Tang,Yun-Long Tang,Zijian Hong,M. A. P. Gonçalves,Margaret McCarter,Christoph Klewe,Kayla X. Nguyen,Fernando Gómez-Ortiz,P. Shafer,Elke Arenholz,Vladimir Stoica,Shang-Lin Hsu,Shang-Lin Hsu,Bo Wang,Colin Ophus,Jian Liu,Christopher T. Nelson,Sahar Saremi,Bhagwati Prasad,Antonio B. Mei,Darrell G. Schlom,Jorge Íñiguez,Pablo García-Fernández,David A. Muller,Long Qing Chen,Javier Junquera,Lane W. Martin,Lane W. Martin,Ramamoorthy Ramesh,Ramamoorthy Ramesh +30 more
TL;DR: In this paper, a room-temperature polar-skyrmion bubbles were discovered in a lead titanate layer confined by strontium titanate layers, which were imaged by atomic-resolution scanning transmission electron microscopy.
Journal ArticleDOI
Ultrahigh capacitive energy density in ion-bombarded relaxor ferroelectric films
Jieun Kim,Sahar Saremi,Megha Acharya,Gabriel Velarde,Eric Parsonnet,Patrick Donahue,Alexander Qualls,David A. Garcia,Lane W. Martin,Lane W. Martin +9 more
TL;DR: It is shown that high-energy ion bombardment improves the energy storage performance of relaxor ferroelectric thin films and suggests that postprocessing may be important for developing the next generation of capacitors.
Journal ArticleDOI
New modalities of strain-control of ferroelectric thin films
Anoop R. Damodaran,Joshua C. Agar,Shishir Pandya,Zuhuang Chen,Zuhuang Chen,Liv R. Dedon,Ruijuan Xu,Brent A. Apgar,Sahar Saremi,Lane W. Martin,Lane W. Martin +10 more
TL;DR: How these new approaches to strain engineering provide promising routes to control and decouple ferroelectric susceptibilities and create new modes of response not possible in the confines of conventional strain engineering is discussed.
Journal ArticleDOI
Large Flexoelectric Anisotropy in Paraelectric Barium Titanate
Jackeline Narvaez,Sahar Saremi,Jiawang Hong,Massimiliano Stengel,Massimiliano Stengel,Gustau Catalan +5 more
TL;DR: The bending-induced polarization of barium titanate single crystals has been measured with an aim to elucidate the origin of the large difference between theoretically predicted and experimentally measured flexoelectricity in this material, and it is indicated that part of the difference is due to polar regions that exist above T(C) and up to T*≈200-225 °C.
Journal ArticleDOI
Local negative permittivity and topological phase transition in polar skyrmions
Sujit Das,Zijian Hong,Zijian Hong,Vladimir Stoica,M. A. P. Gonçalves,M. A. P. Gonçalves,Yu-Tsun Shao,Eric Parsonnet,Eric J. Marksz,Sahar Saremi,Margaret McCarter,A. Reynoso,Christian J. Long,Aaron M. Hagerstrom,Derek Meyers,V. Ravi,Bhagwati Prasad,H. Zhou,Zhan Zhang,Haidan Wen,Fernando Gómez-Ortiz,Pablo García-Fernández,Jeffrey Bokor,Jorge Íñiguez,John W. Freeland,Nathan D. Orloff,Javier Junquera,Long Qing Chen,Sayeef Salahuddin,David A. Muller,Lane W. Martin,Lane W. Martin,Ramamoorthy Ramesh,Ramamoorthy Ramesh +33 more
TL;DR: Polar skyrmions are topologically protected structures that can exist in (PbTiO 3 ) n /(SrTiO3 ) n superlattices and it is shown that they have negative permittivity at the surface, and that they can undergo a reversible phase transition with large dielectric tunability under an electric field.