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6 papers · 2 filters
Time-Resolved Intraband Relaxation of Strongly-Confined Electrons and Holes in Colloidal PbSe Nanocrystals
Jeffrey M. Harbold, Frank W. Wise, Hui Du +3
The relaxation of strongly-confined electrons and holes between 1P and 1S levels in colloidal PbSe nanocrystals has been time-resolved using femtosecond transient absorption spectr…
Spectroscopy of Valley Splitting in a Silicon/Silicon-Germanium Two-Dimensional Electron Gas
Srijit Goswami, Mark Friesen, J. L. Truitt +8
The lifting of the two-fold degeneracy of the conduction valleys in a strained silicon quantum well is critical for spin quantum computing. Here, we obtain an accurate measurement…
Bipolar High Field Excitations in Co/Cu/Co Nanopillars
B. Özyilmaz, A. D. Kent, M. J. Rooks +1
Current-induced magnetic excitations in Co/Cu/Co bilayer nanopillars (50 nm in diameter) have been studied experimentally at low temperatures for large applied fields perpend…
Current-Induced Effective Magnetic Fields in Co/Cu/Co Nanopillars
M. A. Zimmler, B. Özyilmaz, W. Chen +4
We present a method to measure the effective field contribution to spin-transfer-induced interactions between the magnetic layers in a trilayer nanostructure, which enables spin-cu…
Rigorous Born Approximation and beyond for the Spin-Boson Model
D. P. DiVincenzo, D. Loss
Within the lowest-order Born approximation, we present an exact calculation of the time dynamics of the spin-boson model in the ohmic regime. We observe non-Markovian effects at ze…
Currents, Torques, and Polarization Factors in Magnetic Tunnel Junctions
J. Slonczewski
Application of Bardeen's tunneling theory to magnetic tunnel junctions having a general degree of atomic disorder reveals the close relationship between magneto-conduction and volt…