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146 papers · 1 filter
Nuclear Spins in a Nanoscale Device for Quantum Information Processing
S. K. Ozdemir, A. Miranowicz, T. Ota +3
Coherent oscillations between any two levels from four nuclear spin states of I=3/2 have been demonstrated in a nanometre-scale NMR semiconductor device, where nuclear spins are al…
Ultrafast Critical Dynamics of Ferroelectric Phase Transition in PbGeTe
Rong Lu, Muneaki Hase, Masahiro Kitajima +2
Transient responses of the electronic excitation and coherent soft phonon are investigated both above and below the ferroelectric phase transition temperature T in Pb…
Micro-magnets for coherent control of spin-charge qubit in lateral quantum dots
M. Pioro-Ladriere, Y. Tokura, T. Obata +2
A lateral quantum dot design for coherent electrical manipulation of a two-level spin-charge system is presented. Two micron-size permanent magnets integrated to high-frequency ele…
Paramagnetic GaN:Fe and ferromagnetic (Ga,Fe)N - relation between structural, electronic, and magnetic properties
A. Bonanni, M. Kiecana, C. Simbrunner +8
We report on the metalorganic chemical vapor deposition (MOCVD) of GaN:Fe and (Ga,Fe)N layers on c-sapphire substrates and their thorough characterization via high-resolution x-ray…
State Differentiation by Transient Truncation in Coupled Threshold Dynamics
Yoshinori Watanabe, Kunihiko kaneko
Dynamics with a threshold input--output relation commonly exist in gene, signal-transduction, and neural networks. Coupled dynamical systems of such threshold elements are investig…
Magneto-optical and magnetotransport properties of heavily Mn-doped GaMnAs
Shinobu Ohya, Kenichi Ohno, Masaaki Tanaka
We have studied the magneto-optical and magnetotrasnport properties of GaMnAs thin films with high Mn concentrations (x= 12.2 - 21.3%) grown by molecular-beam epitaxy. These heavil…