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Full-Text Articles in Physics
Low Temperature Anomaly In Mesoscopic Kondo Wires, P. Mohanty, Richard A. Webb
Low Temperature Anomaly In Mesoscopic Kondo Wires, P. Mohanty, Richard A. Webb
Faculty Publications
We report the observation of an anomalous magnetoresistance in extremely dilute quasi-one-dimensional AuFe wires at low temperatures, along with a hysteretic background at low fields. The Kondo resistivity does not show the unitarity limit down to the lowest temperature, implying uncompensated spin states. We suggest that the anomalous magnetoresistance may be understood as the interference correction from the accumulation of geometric phase in the conduction electron wave function around the localized impurity spin.
Simplified Calculation Of The Stability Matrix For Semiclassical Propagation, Sophya V. Garashchuk, J. C. Light
Simplified Calculation Of The Stability Matrix For Semiclassical Propagation, Sophya V. Garashchuk, J. C. Light
Faculty Publications
We present a simple method of calculation of the stability (monodromy) matrix that enters the widely used semiclassical propagator of Herman and Kluk and almost all other semiclassical propagators. The method is based on the unitarity of classical propagation and does not involve any approximations. The number of auxiliary differential equations per trajectory scales linearly rather than quadratically with the system size. Just the first derivatives of the potential surface are needed. The method is illustrated on the collinear H3 system.