Angle-resolved photoemission intensity of high temperature superconductors based on the spin polaron formulation

Abstract

Spin polaron formulation at finite temperature was used to calculate the angle-resolved photoemission (ARPES) intensity of high-temperature superconductors. In the Matsubara Green’s function method, the spin polaron Hamiltonian is the interaction term in S-matrix. In this case, holes are described as spinless fermions (holons) and spins are normal bosons. ARPES intensity calculation considered the imaginary part of the retarded Green’s function integrated with a Gaussian instrumental resolution function and with the Fermi-Dirac distribution function. The intensity of the spectrum is comparable with the expression by Alexandrov and Mott (1994).