T
Towfiq Ahmed
Researcher at Los Alamos National Laboratory
Publications - 31
Citations - 632
Towfiq Ahmed is an academic researcher from Los Alamos National Laboratory. The author has contributed to research in topics: Graphene & Monolayer. The author has an hindex of 13, co-authored 27 publications receiving 505 citations.
Papers
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Journal ArticleDOI
Phonon Mode Transformation Across the Orthohombic-Tetragonal Phase Transition in a Lead Iodide Perovskite CH3NH3PbI3: A Terahertz Time-Domain Spectroscopy Approach.
Chan La-o-vorakiat,Huanxin Xia,Jeannette Kadro,Jeannette Kadro,Teddy Salim,Daming Zhao,Towfiq Ahmed,Yeng Ming Lam,Jian-Xin Zhu,Rudolph A. Marcus,Rudolph A. Marcus,Maria-Elisabeth Michel-Beyerle,Elbert E. M. Chia +12 more
TL;DR: In this article, the authors studied the temperature-dependent phonon modes of the organometallic lead iodide perovskite CH3NH3PbI3 thin film across the terahertz (0.5 −3 THz) and temperature (20 −300 K) ranges.
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Role of scaffold network in controlling strain and functionalities of nanocomposite films
Aiping Chen,Jia Mian Hu,Ping Lu,Tiannan Yang,Wenrui Zhang,Leigang Li,Towfiq Ahmed,Erik Enriquez,Marcus Weigand,Qing Su,Haiyan Wang,Jian-Xin Zhu,Judith L. MacManus-Driscoll,Long Qing Chen,Dmitry Yarotski,Quanxi Jia +15 more
TL;DR: Under direct lattice matching framework, large and uniform vertical strain up to 2% can be achieved to significantly modify the magnetic anisotropy, magnetism, and magnetotransport properties in heteroepitaxial nanoscaffold films, over a few hundred nanometers in thickness.
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Optical properties of organometallic perovskite: An ab initio study using relativistic GW correction and Bethe-Salpeter equation
TL;DR: In this article, the optical and vibrational properties of organometallic cubic perovskite CH3NH3PbI3 were investigated using first-principles calculations.
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On‐Fabrication Solid‐State N‐Doping of Graphene by an Electron‐Transporting Metal Oxide Layer for Efficient Inverted Organic Solar Cells
Hobeom Kim,Jinwoo Byun,Sang-Hoon Bae,Towfiq Ahmed,Jian-Xin Zhu,Sung Joo Kwon,Yeongjun Lee,Sung-Yong Min,Christoph Wolf,Hong Kyu Seo,Jong Hyun Ahn,Tae-Woo Lee +11 more
TL;DR: Lee et al. as mentioned in this paper proposed a method to solve the problem of particle filtering in the context of nanotechnologies, which is similar to the one we are investigating in this paper.
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Magnetic, electronic, and optical properties of double perovskite Bi2FeMnO6
TL;DR: In this article, the magnetic, electronic, and optical properties in BFMO were investigated by performing the density functional theory calculations and experimental measurements of magnetic moment, and it was shown that the onsite local correlation on Mn and Fe sites is critical to the gap opening, which is a prerequisite condition for the ferroelectric ordering.