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Yan, Peng (author), Bauer, G.E. (author), Zhang, Huaiwu (author)
The concept of temperature in nonequilibrium thermodynamics is an outstanding theoretical issue. We propose an energy repartition principle that leads to a spectral (mode-dependent) temperature in steady-state nonequilibrium systems. The general concepts are illustrated by analytic solutions of the classical Heisenberg spin chain connected to...
journal article 2017
document
Zhou, Y. (author), Xiao, J. (author), Bauer, G.E.W. (author), Zhang, F.C. (author)
We study the magnetization dynamics of spin valve structures with a free composite synthetic ferromagnet (SyF) that consists of two ferromagnetic layers coupled through a normal metal spacer. A ferromagnetically coupled SyF can be excited into dynamical precessional states by an applied current without external magnetic fields. We analytically...
journal article 2013
document
Hatami, M. (author), Bauer, G.E.W. (author), Zhang, Q. (author), Kelly, P.J. (author)
We model and evaluate the Peltier and Seebeck effects in magnetic multilayer nanostructures by a finite-element theory of thermoelectric properties. We present analytical expressions for the thermopower and the current-induced temperature changes due to Peltier cooling/heating. The thermopower of a magnetic element is in general spin polarized,...
journal article 2009
document
Hrauda, N. (author), Zhang, J.J. (author), Stangl, J. (author), Rehman-Khan, A. (author), Bauer, G. (author), Stoffel, M. (author), Schmidt, O.G. (author), Jovanovich, V. (author), Nanver, L.K. (author)
In this work self-organized SiGe islands are used as stressors for Si capping layers, which later act as carrier channels in field effect transistors. To be able to address individual islands and to obtain a sufficiently narrow distribution of their properties, the SiGe islands are grown by molecular beam epitaxy on prepatterned Si substrates,...
journal article 2009
document
Hrauda, N. (author), Zhang, J.J. (author), Stoffel, M. (author), Stangl, J. (author), Bauer, G. (author), Rehman-Khan, A. (author), Holy, V. (author), Schmidt, O.G. (author), Jovanovic, V. (author), Nanver, L.K. (author)
We report on studies of strain and composition of two-dimensionally ordered SiGe islands grown by molecular beam epitaxy using high resolution x-ray diffraction. To ensure a small size distribution of the islands, pit-patterned 4 (001) Si wafers were used as substrates. The Si wafers were patterned by optical lithography and reactive ion etching...
journal article 2009
document
Zhang, J.J. (author), Stoffel, M. (author), Rastelli, A. (author), Schmidt, O.G. (author), Jovanovi?, V. (author), Nanver, L.K. (author), Bauer, G. (author)
The morphological evolution of both pits and SiGe islands on patterned Si(001) substrates is investigated. With increasing Si buffer layer thickness the patterned holes transform into multifaceted pits before evolving into inverted truncated pyramids. SiGe island formation and evolution are studied by systematically varying the Ge coverage and...
journal article 2007
document
Hatami, M. (author), Bauer, G.E.W. (author), Zhang, Q. (author), Kelly, P.J. (author)
journal article 2007
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