Results 211 to 220 of about 18,697,974 (254)

Alloying‐Controlled Tuning of Interfacial Spin‐Orbit Interaction and Magnetic Damping in Crystalline FeCo Thin Films Grown on GaAs(001)

Advanced Materials, EarlyView.
The interfacial spin‐orbit interaction in single‐crystalline Fe1−xCox thin films grown on GaAs(001) can be continuously tuned via alloying. Using spin‐orbit ferromagnetic resonance, the authors find that the interfacial spin‐orbit fields exhibit a nonmonotonic dependence on Co concentration, with a minimum at 20% Co. ABSTRACT The discovery of intrinsic
Hongrui Lao, Matthias Kronseder, Zhe Yuan, Thomas Narr, Thomas N. G. Meier, Nadine Mundigl, Xianlin Qu, Zhongchang Wang, Christian H. Back, Lin Chen   +9 more
wiley   +1 more source

Spin Transport Across Interfaces With the Non‐Collinear Antiferromagnet Mn3Sn

Advanced Materials, EarlyView.
We study spin transport with Mn3Sn|Metal${\rm Mn}_3{\rm Sn}\vert{\rm Metal}$ heterostructures. For Mn3Sn|Pt${\rm Mn}_3{\rm Sn}\vert{\rm Pt}$ heterostructures, ultrafast spin current generation by optical pumping of Mn3Sn${\rm Mn}_3{\rm Sn}$ is explored, while for Mn3Sn|NiFe${\rm Mn}_3{\rm Sn}\vert{\rm NiFe}$ heterostructures, we probe the spin–charge ...
Paul A. Marschall, Wolfgang Hoppe, Prajwal Rigvedi, Börge Göbel, Franziska Ziolkowski, Samir Lounis, Banabir Pal, Stuart S. P. Parkin, Georg Woltersdorf   +8 more
wiley   +1 more source

space-time symmetry field

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The exceptionality of space-time symmetries

, 2009
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Symmetries of space-time and geodesic symmetries

Journal of Mathematical Physics, 1990
It is shown how to construct symmetries of the geodesic equation starting from space-time symmetries. The constants of motion associated with space-time symmetries are recovered and a few new ones are found using non-Noetherian conservation theorems. Explicit examples are presented.
Del-Castillo-Negrete, Diego, Hojman, Sergio   +1 more
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Internal and Space-Time Symmetries

Physical Review, 1965
To account for the observed multiplet structure and the mass relations among the known elementary particles, a coupling of internal and space-time properties is considered. Earlier attempts in this direction have failed. The problem is re-examined from a more general point of view, and it is found that under these more relaxed conditions a coupling is ...
Ottoson, U., Kihlberg, A., Nilsson, Jan
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Concerning Space-Time and Symmetry Groups

Physical Review, 1964
Several theorems are proved which exhibit the impossibility of constructing nontrivial products of the Lorentz group with internal symmetry groups for some physically interesting examples. It is also shown that if the Lorentz group is replaced by the Galilei group, qualitatively different results are obtained; a "linear" breakdown of internal symmetry ...
Mayer, M. E., Schnitzer, H. J., Sudarshan, E. C. G., Acharya, R., Han, M. Y.   +4 more
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Fluid space–times and conharmonic symmetries

Journal of Mathematical Physics, 1998
The conharmonic curvature tensor is considered as an invariant of the conharmonic transformation defined by Ishii and the necessary and sufficient conditions for the conharmonic curvature tensor in a perfect fluid space–time to be divergence free has been obtained. Conharmonic motion, conharmonic collineation, and conharmonic curvature collineation are
Abdussattar, Dwivedi, Babita
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Symmetries of Space-Time

2019
Abstract This chapter discusses preliminary concepts needed for the book: relativity and relativistic kinematics, natural units, elements of group theory, discrete symmetries of space ...
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Invariant Approach to a Space-Time Symmetry

Journal of Mathematical Physics, 1971
A study is made of Killing vector fields in vacuum Einstein spaces with a restriction primarily to those fields whose associated bivector is nonnull. However, a well-known theorem of Robinson is modified slightly to show that if such a space admits a null bivector associated with a Killing vector, the space must be algebraically special.
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