Spin wave self-energy calculations with vertex corrections

Authors

  • Marcielow Jocson Callelero ⋅ PH Department of Physics, University of San Carlos
  • Danilo Yanga ⋅ PH Department of Physics, University of San Carlos

Abstract

The spin wave self-energy function with vertex corrections is investigated in this paper using the spin polaron formulation. We implement the theory in the finite temperature (Matsubara) Green's function method in a representation where holes are described as spinless fermions and spins as normal bosons. The spins are characterized by hard-core bosonic operators in linear spin wave theory via the Holstein-Primakoff transformation. The hole-spin wave interaction in the spin polaron Hamiltonian is analogous to the conventional polaron problem and used as the interaction term in the S-matrix expansion. A general expression for the spin wave self-energy function is obtained by first determining the vertex corrections using the Feynman diagrammatic technique, and then evaluated all Matsubara frequency summations by contour integrations.

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Issue

From laboratory to society: Physics in nation building
29 May-1 June 2019, Tagbilaran City

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Article ID

SPP-2019-1G-02

Section

Theoretical and Mathematical Physics

Published

2019-05-07

How to Cite

[1]
MJ Callelero and D Yanga, Spin wave self-energy calculations with vertex corrections, Proceedings of the Samahang Pisika ng Pilipinas 37, SPP-2019-1G-02 (2019). URL: https://proceedings.spp-online.org/article/view/SPP-2019-1G-02.