Narrow I-Spin Zero NN Resonance

Observation of spin diffusion in zero-field magnetic resonance.

MAGNETISATION AND ELECTRON SPIN RESONANCE STUDIES OF TETRAHEDRAL AMORPHOUS CARBON

The magnetisation and electron spin resonance (ESR) spectrum of two specimens of tetrahedral amorphous carbon (ta-C), deposited from a filtered cathodic arc, were measured over a wide temperature range. The magnetisation was found to consist of superparamagnetic, paramagnetic and diamagnetic contributions. The superparamagnetic contribution resembled that recently found in carbon prepared from ...

Observation of resistively detected hole spin resonance and zero-field pseudo-spin splitting in epitaxial graphene

Electronic carriers in graphene show a high carrier mobility at room temperature. Thus, this system is widely viewed as a potential future charge-based high-speed electronic material to complement-or replace-silicon. At the same time, the spin properties of graphene have suggested improved capability for spin-based electronics or spintronics and spin-based quantum computing. As a result, the de...

Narrow Escape, Part I

A Brownian particle with diffusion coefficient D is confined to a bounded domain by a reflecting boundary, except for a small absorbing window ∂ a . The mean time to absorption diverges as the window shrinks, thus rendering the calculation of the mean escape time a singular perturbation problem. In the three-dimensional case, we construct an asymptotic approximation when the window is an ellips...

Effects of Rashba spin splitting and exchange interaction in electron spin resonance in narrow- gap quantum well heterostructures

We report an electron spin resonance (ESR) study in n-type narrow-gap quantum well (QW) heterostructures. By using the Hartree-Fock approximation based on the 8 k·p Hamiltonian the many-body theory of the ESR in narrow-gap QWs is developed. We have discovered significant enhancement of the ESR g-factor and its low-magnetic-field divergence in both in asymmetric and symmetric QWs which is caused...