D
Divine Kumah
Researcher at North Carolina State University
Publications - 72
Citations - 2201
Divine Kumah is an academic researcher from North Carolina State University. The author has contributed to research in topics: Thin film & Heterojunction. The author has an hindex of 20, co-authored 65 publications receiving 1905 citations. Previous affiliations of Divine Kumah include Yale University & University of Michigan.
Papers
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Journal ArticleDOI
Structural Basis for the Conducting Interface between LaAlO 3 and SrTiO 3
Philip R. Willmott,S. A. Pauli,R. Herger,Christian M. Schlepütz,D. Martoccia,Bruce D. Patterson,Bernard Delley,Roy Clarke,Divine Kumah,Codrin Cionca,Yizhak Yacoby +10 more
TL;DR: The complete atomic structure of a five-monolayer film of LaAlO3 on SrTiO3 has been determined for the first time by surface x-ray diffraction in conjunction with the coherent Bragg rod analysis phase-retrieval method and further structural refinement.
Journal ArticleDOI
Active silicon integrated nanophotonics: ferroelectric BaTiO₃ devices.
Chi Xiong,Wolfram H. P. Pernice,Joseph H. Ngai,James W. Reiner,Divine Kumah,Fred Walker,Chong H. Ahn,Hong X. Tang +7 more
TL;DR: In this paper, the authors demonstrate nanophotonic circuits incorporating ferroelectric barium titanate (BaTiO3) thin films on the ubiquitous silicon-on-insulator (SOI) platform.
Journal ArticleDOI
Active silicon integrated nanophotonics: ferroelectric BaTiO3 devices
Chi Xiong,Wolfram H. P. Pernice,Joseph H. Ngai,James W. Reiner,Divine Kumah,Fred Walker,Chong H. Ahn,Hong X. Tang +7 more
TL;DR: N nanophotonic circuits incorporating ferroelectric BaTiO3 thin films on the ubiquitous silicon-on-insulator (SOI) platform are demonstrated and show modulation bandwidth in the gigahertz regime, which is promising for broadband applications.
Journal ArticleDOI
Surface-magnetoplasmon nonreciprocity effects in noble-metal/ferromagnetic heterostructures
J. B. González-Díaz,Antonio García-Martín,Gaspar Armelles,José Miguel García-Martín,Cesar Clavero,Alfonso Cebollada,Alfonso Cebollada,Rosa A. Lukaszew,J. R. Skuza,Divine Kumah,Roy Clarke +10 more
TL;DR: In this paper, the authors demonstrate magnetic field control of surface plasmon excitations in noble-metal/ferromagnetic/noble metal trilayers, analogous to the effects previously observed in semiconductor structures.
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Orbital engineering in symmetry-breaking polar heterostructures.
Ankit S. Disa,Divine Kumah,Andrei Malashevich,Hanghui Chen,Dario Arena,Eliot D. Specht,Sohrab Ismail-Beigi,Fred Walker,Chong H. Ahn +8 more
TL;DR: It is theoretically shown that three-component heterostructuring is robust and tunable by choice of insulator in the heterostructure, providing a general method for engineering orbital configurations and designing novel electronic systems.