Hai-Qing Lin — Page 11

arXiv2000

Hole spectral functions of LaMnO3

By use of the orbital t-J model, we calculate the photoemission spectra of LaMnO3 using the exact diagonalization technique, and interpret our numerics quite well in the orbital-polaron scenario where the scattering between holes and orbital excitations is treated within the self-consistent Born approximation. The quasiparticle bandwidth is found to be of the order of J and t in the purely Coulombic and Jahn-Teller phononic model, respectively. We suggest that angle-resolved photoemission spectroscopy experiments allow one to distinguish between the orbital-polaron scenario and the Jahn-Teller polaron scenario.

cond-mat.str-el↗

arXiv1999

Thermodynamics of Kondo Model with Electronic Interactions

On the basis of Bethe ansatz solution of one dimensional Kondo model with electronic interaction, the thermodynamics equilibrium of the system in finite temperature is studied in terms of the strategy of Yang and Yang. The string hypothesis in the spin rapidity is discussed extensively. The thermodynamics quantities, such as specific heat and magnetic susceptibility, are obtained.

cond-mat.str-el↗