Topic
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: It is demonstrated that a spin-electricity conversion effect takes place in the surface states of bulk-insulating topological insulators Bi(1.5)Sb(0.7)Se(1-1.3) and Sn-doped Bi(2)Te(2-2)Se.
Abstract: We report successful spin injection into the surface states of topological insulators by using a spin pumping technique. By measuring the voltage that shows up across the samples as a result of spin pumping, we demonstrate that a spin-electricity conversion effect takes place in the surface states of bulk-insulating topological insulators Bi(1.5)Sb(0.5)Te(1.7)Se(1.3) and Sn-doped Bi(2)Te(2)Se. In this process, the injected spins are converted into a charge current along the Hall direction due to the spin-momentum locking on the surface state.
318 citations
TL;DR: In this article, the authors studied classical solutions of three dimensional higher spin gravity in the Chern-Simons formulation and found solutions that generalize the BTZ black hole and carry spin-3 charge.
Abstract: We study classical solutions of three dimensional higher spin gravity in the Chern-Simons formulation. We find solutions that generalize the BTZ black hole and carry spin-3 charge. The black hole entropy formula yields a result for the asymptotic growth of the partition function at finite spin-3 chemical potential. Along the way, we develop technology for computing AdS/CFT correlation functions involving higher spin operators.
317 citations
TL;DR: The relaxation time, T1, of the spin of a single electron confined in a semiconductor quantum dot (a proposed quantum bit) is measured and a lower bound on T1 is found of 50 micros at 7.5 T, only limited by the signal-to-noise ratio.
Abstract: We have measured the relaxation time, ${T}_{1}$, of the spin of a single electron confined in a semiconductor quantum dot (a proposed quantum bit). In a magnetic field, applied parallel to the two-dimensional electron gas in which the quantum dot is defined, Zeeman splitting of the orbital states is directly observed by measurements of electron transport through the dot. By applying short voltage pulses, we can populate the excited spin state with one electron and monitor relaxation of the spin. We find a lower bound on ${T}_{1}$ of $50\text{ }\ensuremath{\mu}\mathrm{s}$ at 7.5 T, only limited by our signal-to-noise ratio. A continuous measurement of the charge on the dot has no observable effect on the spin relaxation.
316 citations
TL;DR: A homologous series of cuprates, Srn -1 Cun + 1 O2n, formed by introducing a parallel array of planar defects into the infinite-layer cuprate, SrCuO2, have been reported by Takano et al. as discussed by the authors.
Abstract: A homologous series of cuprates, Srn -1 Cun + 1 O2n, formed by introducing a parallel array of planar defects into the infinite-layer cuprate, SrCuO2, have been reported by Takano et al. In each CuO2 plane line defects consisting of CuO double chains result. An analysis of the electronic properties of such planes demonstrates that the stoichiometric compounds with n = 3, 7, 11,... will be frustrated quantum antiferromagnets and spin liquids. When lightly doped with holes the spin gap will remain and singlet superconductivity should occur on a separate but high temperature scale. This prediction may shed new light on the origin of the separate energy scales for the spin gap and superconductivity in other lightly doped cuprates.
316 citations
TL;DR: In this article, the coupling between spin, valley and layer degrees of freedom in bilayer WSe2 reveals coherent superpositions of distinct valley configurations and suggests the possibility of electrical control of the spin states.
Abstract: Monolayer and few-layer materials present interesting spin and pseudospin states. A study of the coupling between spin, valley and layer degrees of freedom in bilayer WSe2 reveals coherent superpositions of distinct valley configurations and suggests the possibility of electrical control of the spin states.
316 citations