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Spin-½
About: Spin-½ is a research topic. Over the lifetime, 40423 publications have been published within this topic receiving 796639 citations.
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TL;DR: In this paper, it is proved that a necessary and sufficient condition for a non-compact space-time M to admit a spinor structure is that M have a global field of orthonormal tetrads.
Abstract: In order to define spinor fields on a space‐time M, it is necessary first to endow M with some further structure in addition to its Lorentz metric. This is the spinor structure. The definition and the elementary implications of the existence of a spinor structure are discussed. It is proved that a necessary and sufficient condition for a noncompact space‐time M to admit a spinor structure is that M have a global field of orthonormal tetrads.
469 citations
TL;DR: This work has shown that strain-tunable spin transport in ferromagnetic graphene junctions can be controlled by laser-spot assisted, 3D image analysis, and the structure of the junctions itself can be modified to facilitate spin transport.
Abstract: Scientific Reports 6: Article number: 21590; published online: 22 February 2016; updated: 23 January 2017 This Article contains errors in Reference 15 which was incorrectly given as: Song, Y., Zhai, F. & Guo, Y. Strain-tunable spin transport in ferromagnetic graphene junctions. Appl. Phys. Lett.103, 183111 (2013).
467 citations
TL;DR: The discovery of light-induced spin transition at cryogenic temperatures in a series of iron(II) spin-crossover compounds in 1984 has had an enormous impact on spin crossover research as mentioned in this paper.
Abstract: The discovery of a light-induced spin transition at cryogenic temperatures in a series of iron(II) spin-crossover compounds in 1984 has had an enormous impact on spin-crossover research. Apart from being an interesting photophysical phenomenon in its own right, it provided the means of studying the dynamics of the intersystem crossing process between the high-spin and the low-spin state in a series of compounds and over a large temperature range. It could thus be firmly established that intersystem crossing in spin-crossover compounds is a tunnelling process, with a limiting low-temperature lifetime below 50 K and a thermally activated region above 100 K. This review begins with an elucidation of the mechanism of the light-induced spin transition, followed by an in depth discussion of the chemical and physical factors, including cooperative effects, governing the lifetimes of the light-induced metastable states.
458 citations
TL;DR: The isobaric spin dependence of the real part of the nuclear potential is investigated in this paper, which is expected theoretically from the action of Heisenberg forces and the exchange effects of other forces.
458 citations
TL;DR: This Letter studies spin-1/2 andspin-1 Bose-Einstein condensates with Rashba spin-orbit coupling, and finds that the condensate wave function will develop nontrivial structures.
Abstract: An effective spin-orbit coupling can be generated in a cold atom system by engineering atom-light interactions. In this Letter we study spin-1/2 and spin-1 Bose-Einstein condensates with Rashba spin-orbit coupling, and find that the condensate wave function will develop nontrivial structures. From numerical simulation we have identified two different phases. In one phase the ground state is a single plane wave, and often we find the system splits into domains and an array of vortices plays the role of a domain wall. In this phase, time-reversal symmetry is broken. In the other phase the condensate wave function is a standing wave, and it forms a spin stripe. The transition between them is driven by interactions between bosons. We also provide an analytical understanding of these results and determine the transition point between the two phases.
457 citations