R
Rama K. Vasudevan
Researcher at Oak Ridge National Laboratory
Publications - 231
Citations - 5499
Rama K. Vasudevan is an academic researcher from Oak Ridge National Laboratory. The author has contributed to research in topics: Ferroelectricity & Piezoresponse force microscopy. The author has an hindex of 33, co-authored 196 publications receiving 4033 citations. Previous affiliations of Rama K. Vasudevan include University of New South Wales.
Papers
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Journal ArticleDOI
Exploring the Magnetoelectric Coupling at the Composite Interfaces of FE/FM/FE Heterostructures.
Dhiren K. Pradhan,Dhiren K. Pradhan,Shalini Kumari,Shalini Kumari,Rama K. Vasudevan,Evgheni Strelcov,Venkata Sreenivas Puli,Dillip K. Pradhan,Ashok Kumar,J. Marty Gregg,Aswini K. Pradhan,Sergei V. Kalinin,Ram S. Katiyar +12 more
TL;DR: The ferroelectric, magnetic and ME properties of PFN/NZFO/PFN trilayer nanoscale heterostructure are reported, revealing them as potential candidates for nanoscales multifunctional and spintronics device applications.
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Enhanced electric conductivity at ferroelectric vortex cores in BiFeO 3
Nina Balke,B. Winchester,Wei Ren,Ying-Hao Chu,Anna N. Morozovska,Eugene A. Eliseev,Mark Huijben,Rama K. Vasudevan,Petro Maksymovych,Jason Britson,Stephen Jesse,Igor Kornev,Ramamoorthy Ramesh,Laurent Bellaiche,Long Qing Chen,Sergei V. Kalinin +15 more
TL;DR: In this paper, the authors explore electronic transport at artificially created ferroelectric vortices in BiFeO3 thin films and demonstrate the creation of one-dimensional conductive channels activated at voltages as low as 1 V.
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Deep Learning of Atomically Resolved Scanning Transmission Electron Microscopy Images: Chemical Identification and Tracking Local Transformations.
Maxim Ziatdinov,Ondrej Dyck,Artem Maksov,Xufan Li,Xiahan Sang,Kai Xiao,Raymond R. Unocic,Rama K. Vasudevan,Stephen Jesse,Sergei V. Kalinin +9 more
TL;DR: This work develops a "weakly supervised" approach that uses information on the coordinates of all atomic species in the image, extracted via a deep neural network, to identify a rich variety of defects that are not part of an initial training set.
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Ferroelectric or non-ferroelectric: Why so many materials exhibit "ferroelectricity" on the nanoscale
TL;DR: In the last 20 years, the development of voltage-modulated scanning probe microscopy techniques, exemplified by Piezoresponse force microscopy (PFM) and associated time and voltage spectroscopies, opened a pathway to explore these materials on a single-digit nanometer level as discussed by the authors.
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Domain Wall Geometry Controls Conduction in Ferroelectrics
Rama K. Vasudevan,Anna N. Morozovska,Eugene A. Eliseev,Jason Britson,Jan Chi Yang,Ying-Hao Chu,Petro Maksymovych,Long Qing Chen,Valanoor Nagarajan,Sergei V. Kalinin +9 more
TL;DR: This work demonstrates via ambient and ultrahigh-vacuum scanning probe microscopy measurements in bismuth ferrite that the conductivity of the domain walls can be modulated by up to 500% in the spatial dimension as a function of domain wall curvature, thereby expanding potential applications for oxide ferroics in future nanoscale electronics.