Quadrupole Excitation in Tunnel Splitting Oscillation in NanoparticleReportar como inadecuado




Quadrupole Excitation in Tunnel Splitting Oscillation in Nanoparticle - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

RETRACTED This article has been retracted as it is found to contain asubstantial amount of material, without referencing, from the paper“Ground State Tunnel Splitting in Mn12 Acetate, undergraduate SeniorHonors Thesis Amherst College,” Micheal Foss-Feig, 2006.

Advances in Condensed Matter PhysicsVolume 2012 2012, Article ID 530765, 4 pages

Research ArticlePhysical-Technical Institute Named after S.U.Umarov, Academy of Sciences of Republic of Tajikistan, Aini Ave 299-1, Dushanbe, Tajikistan

Received 25 January 2012; Revised 14 March 2012; Accepted 14 March 2012

Academic Editor: Rosa Lukaszew

Copyright © 2012 Yousef Yousefi and Khikmat Kh. Muminov. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We analyze the interference between tunneling paths that occurfor a spin system with special Hamiltonian both for dipole and quadrupoleexcitations. Using an instanton approach, we find that as the strengthof the second-order transverse anisotropy is increased, the tunnel splitting for both excitations is modulated, with zeros occurring periodically and the number of quenching points for quadrupole excitationdecreasing. This effect results from the interference of four tunnelingpaths connecting easy-axis spin orientations and occurs in the absenceof any magnetic field.





Autor: Yousef Yousefi and Khikmat Kh. Muminov

Fuente: https://www.hindawi.com/



DESCARGAR PDF




Documentos relacionados