Spin fluctuations inAl3V: An NMR study

Spin fluctuations in Al3V: An NMR study

We report the results of a nuclear magnetic resonance ~NMR! study of Al3V at temperatures between 4 and 300 K. V and Al Knight shifts exhibit a Curie-Weiss behavior corresponding to an effective moment Pe f f.0.32mB per V, indicating intrinsic weak magnetism localized in vanadium orbitals. The T1 exhibits a AT dependence at higher temperatures, indicative of nearly antiferromagnetic behavior of...

An Entanglement Study of Superposition of Qutrit Spin-Coherent States

Considering generalized concurrence as the criterion of entanglement, we study entanglement properties of superposition of two qutrit coherent states, as a function of their amplitudes. These states may attain maximum entanglement or no entanglement at all, depending on the choice of the parameters involved. The states revealing maximum entanglement also display the maximum violations of the Be...

Pairing with Spin Fluctuations

Superconductivity requires a “pairing interaction”—an indirect attractive force between the conduction electrons that can overcome their direct Coulomb repulsion. To prove which particular degrees of freedom provide this pairing interaction is supremely difficult: nearly 40 years elapsed between the discovery of superconductivity in 1911 and the “smoking gun” measurement of the isotope effect t...

Fluctuations in spin nematics

Fluctuation effects in nematic-type phases in quantum systems of spin 1 and 9 are examined. The analogue of the Mermin-Wagnertheoremis formulated and the perturbation theory is shown to be logarithmically divergent under certain conditions. The low-energy excitations depend on the parity of 2s.

On spin glass fluctuations