Journal of Membrane Science & Technology

Spin transport of the frustrated quasi-twodimensional XY-like anti-ferromagnet

International Conference on Membrane Science and Technology

September 11-12, 2017 | Paris, France

L S Lima

Centro Federal de Educação Tecnológica de Minas Gerais, Brazil

Scientific Tracks Abstracts: J Membra Sci Technol

Abstract:

We use the Self Consistent Harmonic Approximation together with the Kubo formalism of the linear response theory to study the spin transport in the twodimensional frustrated Heisenberg anti-ferromagnet in a square lattice with easy-plane ion single anisotropy. The regular part of the spin conductivity Ï?regï? ï?¨(Ï?) is determined for several values of the critical ion single parameter Dc, which separates the low D region from the large D quantum paramagnetic phase. We have obtained an abrupt change in the spin conductivity in the discontinuity points of the graphic Dc vs. η, where the system presents a quantum phase transition.

Biography :

L S Lima has completed his PhD at the age of 31 years from Universidade Federal de Minas Gerais - Brazil and postdoctoral studies from Tecnische Universität Kaiserslautern, Germany. He is professor of physics of Departamento de Física e Matemática Centro Federal de Educação Tecnológica de Minas Gerais. He has published more than 40 papers in international journals.