Ralph, Daniel - Cornell University - the department of physics

个人简介

Educational Background B.S., 1986, Physics and Mathematics, Vanderbilt University. Ph.D., 1993, Physics, Cornell University. Postdoctoral Research Associate, Harvard University, 1993-96. Assistant Professor, Physics, Cornell University, 1996-2000. Associate Professor, Physics, Cornell University, 2000-2004. Professor, Physics, Cornell University, 2004-2013. F.R. Newman Professor of Physics, Cornell University, 2013-present. Lester B. Knight Director, Cornell NanoScale Science Technology Facility (CNF) 2010-present. Alfred P. Sloan Fellow, 1996-99. David and Lucile Packard Foundation Fellow, 1997-2002. William L. McMillan Award, 1997. Research Corporation Research Innovation Award, 1997. ONR Young Investigators Award, 1997-2000. Member, Kavli Institute at Cornell.

研究领域

Our group's research focuses on the electronic and magnetic properties of nm-scale samples. The work in the group consists of making nanometer-size devices using equipment at the Cornell NanoScale Science Technology Facility (CNF), and then performing electrical, magnetic, and optical measurements in Clark Hall.

近期论文

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Valley degeneracy breaking by magnetic field in monolayer MoSe2, D. MacNeill, C. Heikes, K. F. Mak, Z. Anderson, A. Kormányos, Viktor Zólyomi, J. Park, and D. C. Ralph, Phys. Rev. Lett. 114, 037401 (2015). Spin-transfer torque generated by a topological insulator, A. R. Mellnik, J. S. Lee, A. Richardella, J. L. Grab, P. J. Mintun, M. H. Fischer, A. Vaezi, A. Manchon, E.-A. Kim, N. Samarth, and D. C. Ralph, Nature 511, 449-451 (2014). Deterministic switching of ferromagnetism at room temperature using an electric field, J. T. Heron, J. L. Bosse, Q. He, Y. Gao, M. Trassin, J. D. Clarkson, C. Wang, J. Liu, S. Salahuddin, D. C. Ralph, D. G. Schlom, J. Íñiguez, B. D. Huey, and R. Ramesh, Nature 516, 370-373 (2014). Spin torque switching with the giant spin Hall effect of tantalum, Luqiao Liu, Chi-Feng Pai, Y. Li, H. W. Tseng, D. C. Ralph, and R. A. Buhrman, Science 336, 555-558 (2012). Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect, Luqiao Liu, Takahiro Moriyama, D. C. Ralph, and R. A. Buhrman, Phys. Rev. Lett. 106, 036601 (2011). Mechanical Control of Spin States in Spin-1 Molecules and the Underscreened Kondo Effect, J. J. Parks, A. R. Champagne, T. A. Costi, W. W. Shum, A. N. Pasupathy, E. Neuscamman, S. Flores-Torres, P. S. Cornaglia, A. A. Aligia, C. A. Balseiro, G. K.-L. Chan, H. D. Abruña, and D. C. Ralph, Science 328, 1370-1373 (2010). Coupling of Spin and Orbital Motion of Electrons in Carbon Nanotubes, F. Kuemmeth, S. Ilani, D. C. Ralph, and P. L. McEuen, Nature 452, 448-452 (2008). Measurement of the Spin-Transfer-Torque Vector in Magnetic Tunnel Junctions, J. C. Sankey, Y.-T. Cui, J. Z. Sun, J. C. Slonczewski, R. A. Buhrman, and D. C. Ralph, Nature Physics 4, 67-71 (2008). Magnetic vortex oscillator driven by dc spin-polarized current, V. S. Pribiag, I. N. Krivorotov, G. D. Fuchs, P. M. Braganca, O. Ozatay, J. C. Sankey, D. C. Ralph, and R. A. Buhrman, Nature Physics 3, 498-503 (2007). Time-Domain Measurements of Nanomagnet Dynamics Driven by Spin-Transfer Torques, I. N. Krivorotov, N. C. Emley, J. C. Sankey, S. I. Kiselev, D. C. Ralph, and R. A. Buhrman, Science 307, 228-231 (2005). The Kondo effect in the presence of ferromagnetism, A. N. Pasupathy, R. C. Bialczak, J. Martinek, J. E. Grose, L. A. K. Donev, P. L. McEuen, and D. C. Ralph, Science 306, 86-89 (2004). Microwave oscillations of a nanomagnet driven by a spin-polarized current, S. I. Kiselev, J. C. Sankey, I. N. Krivorotov, N. C. Emley, R. J. Schoelkopf, R. A. Buhrman, and D. C. Ralph, Nature 425, 380-383 (2003). Coulomb Blockade and the Kondo Effect in Single Atom Transistors, Jiwoong Park, A. N. Pasupathy, J. I. Goldsmith, C. Chang, Y. Yaish, J. R. Petta, M. Rinkoski, J. P. Sethna, H. D. Abruña, P. M. McEuen, and D. C. Ralph, Nature 417, 722-725 (2002). Current-Driven Magnetization Reversal and Spin Wave Excitations in Co/Cu/Co Pillars, J. A. Katine, F. J. Albert, R. A. Buhrman, E. B. Myers, and D. C. Ralph, Phys. Rev. Lett. 84, 3149-3152 (2000). Current-Induced Switching of Domains in Magnetic Multilayer Devices, E. B. Myers, D. C. Ralph, J. A. Katine, R. N. Louie, and R. A. Buhrman, Science 285, 867-870 (1999).