@article{lee_kumar_hunte_narayan_schwartz_2015, title={Microstructure and transport properties of epitaxial topological insulator Bi2Se3 thin films grown on MgO (100), Cr2O3 (0001), and Al2O3 (0001) templates}, volume={118}, number={12}, journal={Journal of Applied Physics}, author={Lee, Y. F. and Kumar, R. and Hunte, F. and Narayan, J. and Schwartz, J.}, year={2015} } @article{jin_nori_lee_kumar_wu_prater_kim_narayan_2015, title={Strain induced room temperature ferromagnetism in epitaxial magnesium oxide thin films}, volume={118}, number={16}, journal={Journal of Applied Physics}, author={Jin, Z. H. and Nori, S. and Lee, Y. F. and Kumar, D. and Wu, F. and Prater, J. T. and Kim, K. W. and Narayan, J.}, year={2015} } @misc{lee_punugupati_wu_jin_narayan_schwartz_2014, title={Evidence for topological surface states in epitaxial Bi2Se3 thin film grown by pulsed laser deposition through magneto-transport measurements}, volume={18}, ISSN={["1879-0348"]}, DOI={10.1016/j.cossms.2014.07.001}, abstractNote={We report epitaxial growth via domain matching epitaxy of Bi2Se3 thin films on Al2O3 (0 0 0 1) substrates with over 13% lattice misfit and critical thickness less than one monolayer. X-ray and electron diffraction patterns confirm that the layers are epitaxial with (0 0 0 1) Bi2Se3 || (0 0 0 1) Al2O3 and [21¯1¯0] Bi2Se3 || [21¯1¯0] Al2O3 (or) [21¯1¯0] Bi2Se3 || [112¯0] Al2O3 without the presence of an interfacial pseudomorphic layer. X-ray photoemission spectroscopy reveals that the films are Se-deficient, in agreement with electrical transport data showing n-type carriers and metallic behavior. Magneto-resistance (MR) measurements show a cusp feature corresponding to weak antilocalization and linear-MR shows a non-saturating trend up to 9 T. These results suggest topological surface states in PLD-grown Bi2Se3 films.}, number={5}, journal={CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE}, author={Lee, Y. F. and Punugupati, S. and Wu, F. and Jin, Z. and Narayan, J. and Schwartz, J.}, year={2014}, month={Oct}, pages={279–285} } @article{rao_lee_prater_smirnov_narayan_2014, title={Laser annealing induced ferromagnetism in SrTiO3 single crystal}, volume={105}, number={4}, journal={Applied Physics Letters}, author={Rao, S. S. and Lee, Y. F. and Prater, J. T. and Smirnov, A. I. and Narayan, J.}, year={2014} } @article{lee_wu_narayan_schwartz_2014, title={Oxygen vacancy enhanced room-temperature ferromagnetism in Sr3SnO/c-YSZ/Si (001) heterostructures}, volume={4}, ISSN={["2159-6867"]}, DOI={10.1557/mrc.2014.4}, abstractNote={The magnetic properties of Sr_3SnO (SSO) epitaxial thin films prepared under various post-growth annealing treatments are reported. The SSO films are grown on cubic yttria-stabilized zirconia Si (001) platform by pulsed laser deposition. Post-growth vacuum annealing is found to enhance the room-temperature ferromagnetism (RTFM), whereas oxygen annealing reduces it. The results are explained through the oxygen vacancy constituted bound magnetic polarons (BMP) model. An empirical relationship between the extracted BMP concentration and the oxygen vacancy concentration is shown using X-ray photoelectron spectroscopy data. The results indicate a promising way to tune RTFM by manipulating oxygen vacancies and related defects.}, number={1}, journal={MRS COMMUNICATIONS}, author={Lee, Y. F. and Wu, F. and Narayan, J. and Schwartz, J.}, year={2014}, month={Apr}, pages={7–13} } @article{lee_narayan_schwartz_2014, title={Tunable electronic structure in dilute magnetic semiconductor Sr3SnO/c-YSZ/Si (001) epitaxial heterostructures}, volume={116}, number={16}, journal={Journal of Applied Physics}, author={Lee, Y. F. and Narayan, J. and Schwartz, J.}, year={2014} }