منابع مشابه
Antiferromagnetic spin correlations in MnO nanoparticles
We have investigated nearly monodispersive MnO nanoparticles of 10 nm diameter by polarised neutron diffraction with XYZ-polarisation analysis. We found no long-range ordering down to 3.5K. A broad magnetic peak appeared close to Q1⁄4 (1/2,1/2,1/2) signifying short-range antiferromagnetic correlations. The correlation length was found to be about 2.4 nm at T1⁄43.5 K. The correlation length decr...
متن کاملSpin correlations in spin blockade
We investigate spin currents and spin-current correlations for double quantum dots in the spin blockade regime. By analysing the time evolution of the density matrix, we obtain the spin resolved currents and derive from a generating function an expression for the fluctuations and correlations. Both the charge current and the spin current turn out to be generally super-Poissonian. Moreover, we s...
متن کاملSpin-orbit Correlations and Single-spin Asymmetries
In nonrelativistic quantum mechanics, Fourier transforms of the form factors yield charge distributions in the center of mass frame. In general, the concept of a center of mass has no analog in relativistic theories, and thus the position space interpretation of form factors is frame dependent. This is different in the Infinite Momentum Frame (IMF) or light-cone framework, where a Galilean subg...
متن کاملCP observables with spin - spin correlations in chargino production
We study the CP-violating terms of the spin-spin correlations in chargino production ee → χ̃±1 χ̃∓2 , and their subsequent two-body decays into sneutrinos plus leptons. We propose novel CP-sensitive observables with the help of T-odd products of the spin-spin terms. These terms depend on the polarizations of both charginos, with one polarization perpendicular to the production plane. We identify ...
متن کاملSpin correlations in Ho2Ti2O7: a dipolar spin ice system.
The pyrochlore material Ho2Ti2O7 has been suggested to show "spin ice" behavior. We present neutron scattering and specific heat results that establish unambiguously that Ho2Ti2O7 exhibits spin ice correlations at low temperature. Diffuse magnetic neutron scattering is quite well described by a nearest neighbor spin ice model and very accurately described by a dipolar spin ice model. The heat c...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Physique Fizika
سال: 1964
ISSN: 0554-128X
DOI: 10.1103/physicsphysiquefizika.1.31