Functional Material Physics
My research group explores the interface physical properties of multifunctional thin film heterostructures involving magnetic, ferroelectric and dielectric materials using STEM-Z, SQUID magnetometery and polarized neutron reflectivity measurements (in collaboration with ORNL, NIST). We seek to develop new approaches in fabricating novel magnetic nanostructures for room-temperature low power optical sensor applications. Using advanced electronic magnetic resonance spectroscopy (in collaboration with NHML), we identify and investigate the point and complex defects in a wide-varieties of next generation materials including semiconductors, spintronics, 2-D materials, organic-inorganic solar cells, and seek a comprehensive fundamental understanding in enhancing their potential for green-energy applications.
Research Group
Dr. Srinivasa Rao Singamaneni, Assistant Professor
M.S. Students: Luis Martineze (Fall 2016), Maidul Islam (Spring 2017)
Current Projects
- Investigation of interface magnetic and electrical properties of multifunctional thin film heterostructures for non-volatile memory applications.
- Studies of self-assembled magnetic nanostructures and explore their optical responses through internal stimuli for fast sensor devices operational at room temperature.
- Probing for (paramagnetic) point and complex defects in organic and inorganic semiconductors, 2D-materials (graphene, chalcogenides), insulators, and solar cells –addressing their efficiency issues for green-energy devices.
Publications
- Srinivasa Rao Singamaneni, J.T. Prater, and J. Narayan, “Multifunctional Epitaxial Systems on Silicon Substrates”, Applied Physics Reviews, 3, 031301 (2016).
- S. S. Rao, J. T. Prater, Fan Wu, C. T. Shelton, J.-P. Maria, and J. Narayan, “Interface Magnetism in Epitaxial BiFeO3‑La0.7Sr0.3MnO3 Heterostructures Integrated on Si(100)”, Nano Letters 13, 5814 (2013)
- Srinivasa Rao Singamaneni, Johan van Tol, Ruquan Ye and James M. Tour, “Intrinsic and extrinsic defects in a family of coal-derived graphene quantum dots”, Appl. Phys. Lett., 107, 212402 (2015).
- S. S. Rao, S. Narayana Jammalamadaka, A. Stesmans, V. V. Moshchalkov, J. van Tol, D. V. Kosynkin, A. Higginbotham and J. M. Tour “Ferromagnetism in Graphene Nanoribbons: Split Versus Oxidative Unzipped Ribbons”, Nano Letters 12, 1210 (2012).