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cond-mat2003
Thermoelectric Modeling of the Non-Ohmic Differential Conductance in a Tunnel Junction containing a Pinhole
Zhongsheng Zhang, David A. Rabson
To test the quality of a tunnel junction, one sometimes fits the bias-dependent differential conductance to a theoretical model, such as Simmons's formula. Recent experimental work…
cond-mat2003
Crossover from Poisson to Wigner-Dyson Level Statistics in Spin Chains with Integrability Breaking
D. A. Rabson, B. N. Narozhny, A. J. Millis
We study numerically the evolution of energy-level statistics as an integrability-breaking term is added to the XXZ Hamiltonian. For finite-length chains, physical properties exhib…
cond-mat2003
Diagnosis and Location of Pinhole Defects in Tunnel Junctions using only Electrical Measurements
Zhongsheng Zhang, David A. Rabson
In the development of the first generation of sensors and memory chips based on spin-dependent tunneling through a thin trilayer, it has become clear that pinhole defects can have…