Index Catalog // ScholarsArchive@OSU

Creator:: Hoffman, R. L., Wager, J. F., Jayaraj, M. K., and Tate, Janet
Abstract:: Transparent p – i – n heterojunction diodes are fabricated using heavily doped, p-type CuYO₂ and semi-insulating i-ZnO thin films deposited onto a glass substrate coated with n-type indium tin oxide. Rectification is observed, with a ratio of forward-to-reverse current as high as 60 in the range −4–4 V. The...
Resource Type:: Article
Full Text:: - d al 5764 J. Appl. Phys., Vol. 90, No. 11, 1 December 2001 Hoffman et al. [This ar III. DEVICE

Creator:: Hoffman, Anthony J., Sridhar, Aishwarya, Braun, Phillip X., Alekseyev, Leonid, Howard, Scott S., Franz, Kale J., Cheng, Liwei, Choa, Fow-Sen, Sivco, Deborah L, Podolskiy, Viktor A., Narimanov, Evgenii E., and Gmachl, Claire
Abstract:: We report on a novel class of semiconductor metamaterials that employ a strongly anisotropic dielectric function to achieve negative refraction in the midinfrared region of the spectrum, ~8.5–13 μm. We present two types of metamaterials, layered highly doped/undoped heterostructures and quantum well superlattices that are highly anisotropic. Contrary to other...
Resource Type:: Article
Full Text:: . Narimanov, Phys. Rev. B 71, 201101 !2005". 16A. J. Hoffman, L. Alekseyev, S. S. Howard, K. J. Franz, D

Creator:: Kumar, Nitish and Cann, David P.
Abstract:: Lead-free ceramics of composition Bi(Mg₁/₂Ti₁/₂)O₃-(Bi₁/₂K₁/₂)TiO₃-(Bi₁/₂Na₁/₂)TiO₃ were prepared using solid state synthesis techniques. The dielectric spectra showed a Tmax of more than 320 °C for all compositions, and the transitions became increasingly diffuse as the Bi(Mg₁/₂Ti₁/₂)O₃ content increased. A lower temperature transition, indicating a transformation from an ergodic to a non-ergodic...
Resource Type:: Article
Full Text:: . Hoffman, J. Am. Ceram. Soc. 94, 3927 (2011). 23J. Nuffer, D. Lupascu, and J. R€odel, Acta Mater. 48, 3783

Creator:: Kumar, Nitish, Ansell, Troy Y., and Cann, David P.
Abstract:: Lead-free Bi(Mg₁/₂Ti₁/₂)O₃-(Bi₁/₂K₁/₂)TiO₃-(Bi₁/₂Na₁/₂)TiO₃ (BMT-BKT-BNT) ceramics have been shown to exhibit large electromechanical strains under high electric fields along with negligible fatigue under strong electric fields. To investigate the role of point defects on the fatigue characteristics, the composition 5BMT-40BKT-55BNT was doped to incorporate acceptor and donor defects on the A and...
Resource Type:: Article
Full Text:: [subscript 1/2]Na[subscript 1/2])TiO₃ relaxor ceramics Kumar, N., Ansell, T. Y., & Cann, D. P. (2014). Role

Creator:: Yanagi, Hiroshi, Tate, Janet, Park, Sangmoon, Park, Cheol-Hee, Keszler, Douglas A., Hirano, Masahiro, and Hosono, Hideo
Abstract:: The origin of high hole conduction in BaCuQF (Q=S,Se) was investigated by photoemission measurements and full-potential linearized augmented plane wave band-structure calculations. In both compounds, the large dispersion near the top of the valence band is realized by admixed states of Cu 3d and S 3p or Se 4p orbitals,...
Resource Type:: Article
Full Text:: University, Corvallis, Oregon 97331 Sangmoon Park,c� Cheol-Hee Park,d� and Douglas A. Keszler Department of

ScholarsArchive@OSU