Emeritus Faculty, Department of Electrical and Computer Engineering
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Emeritus Faculty, Department of Electrical and Computer Engineering
My research is directed primarily towards the physics of novel semiconductor materials and devices. The work extends from the analysis of the properties of electronic materials and new device concepts to the development of analytical and numerical models. In addition, my group is involved in laboratory work focusing on high-pressure experiments that shed light on the electrical properties of new semiconductor materials and devices.
D.Sc., Physics, 1982, Max Planck Institute (University of Stuttgart), Stuttgart, FRG
Materials and device physics, quantum electronics
“Large magnetoresistance at room temperature in organic molecular tunnel junctions with nonmagnetic contacts”, Z. Xie, S. Shi, F. Liu, D.L. Smith, P.P. Ruden, and C.D. Frisbie, ACS Nano 10, 8571 (2016)
“Characterization of the electric double layer formation dynamics of a metal/ionic liquid/metal structure”, E. Schmidt, S. Shi, P.P. Ruden, and C.D. Frisbie, ACS Applied Materials & Interfaces, 8, 14879 (2016)
“Mobility anisotropy in monolayer black phosphorus due to scattering by charged impurities”, Y. Liu, T. Low, and P.P. Ruden, Phys. Rev. B 93, 165402 (2016)
“Device model for graphene spin valves”, F. Liu, Y. Liu, D.L. Smith, and P.P. Ruden, IEEE Trans. El. Devices 62, 3426 (2015)
“Current-voltage characteristics of organic heterostructure devices with insulating spacer layers”, S. Yin, W. Nie, A.D. Mohite, A. Saxena, D.L. Smith, and P.P. Ruden, Organic Electronics 24, 26 (2015)
“Interface design principles for high-performance organic semiconductor devices”, W. Nie, G. Gupta, B.K. Crone, F. Liu, D.L. Smith, P.P. Ruden, C.-Y. Kuo, H. Tsai, H.-L. Wang, H. Li, S. Tretiak, and A.D. Mohite, Advanced Science 2, 1500024, (2015)
“Effects of disorder on spin injection and extraction for organic semiconductor spin valves,” S. Shi, F. Liu, D.L. Smith, and P.P. Ruden, J. Appl. Phys. 117, 085501 (2015)
“Magneto-electroluminescence of organic heterostructures: Analytical theory and spectrally resolved measurements”, F. Liu, M.R. Kelley, S.A. Crooker, W. Nie, A.D. Mohite, P.P. Ruden, and D.L. Smith, Phys. Rev. B 90, 235314 (2014)
“Scattering in graphene associated with charged out-of-plane impurities”, Y. Liu, A. Goswami, F. Liu, D.L. Smith, and P.P. Ruden, J. Appl. Phys. 116, 234301 (2014)
“Spectrally resolved hyperfine interactions between polaron and nuclear spins in light emitting diodes: Magneto-electroluminescence studies”, S.A. Crooker, F. Liu, M.R. Kelley, N.J.D. Martinez, W. Nie, A. Mohite, I.H. Nayyar, S. Tretiak, D.L. Smith, and P.P. Ruden, Appl. Phys. Lett. 105, 153304 (2014)
“Charge density dependent two-channel conduction in organic electric double layer transistors (EDLTs)”, W. Xie, F. Liu, S. Shi, P.P. Ruden, and C.D. Frisbie, Advanced Materials (2014)
“Coupling of channel conductance and gate-to-channel capacitance in electric double layer transistors”, F.Liu, W. Xie, S. Shi, C.D. Frisbie, and P.P. Ruden, Appl. Phys. Lett. 103, 193304 (2013)
“Spin-polarized tunneling through potential barriers at ferromagnetic metal/semiconductor Schottky contacts”, D.L. Smith and P.P. Ruden, Phys. Rev. B 78, 125202 (2008)
“Ambipolar electrical spin injection and spin transport in organic semiconductors”, M. Yunus, P.P. Ruden, and D.L. Smith, J. Appl. Phys. 103, 103714 (2008)
“Electron transport in semiconducting chiral carbon nanotubes”, M.Z. Kauser, and P.P. Ruden, Appl. Phys. Lett. 89, 162104 (2006)