Orbital-selective Mott transitions in the anisotropic two-band Hubbard model at finite temperatures
C. Knecht, N. Blümer, P. G. J. van Dongen
Abstract
The anisotropic degenerate two-orbital Hubbard model is studied within dynamical mean-field theory at low temperatures. High-precision calculations on the basis of a refined quantum Monte Carlo (QMC) method reveal that two distinct orbital-selective Mott transitions occur for a bandwidth ratio of 2 even in the absence of spin-flip contributions to the Hund exchange. The second transition -- not seen in earlier studies using QMC, iterative perturbation theory, and exact diagonalization -- is clearly exposed in a low-frequency analysis of the self-energy and in local spectra.
Create a lesson
Related papers
Hidden entropic order of emergent charges in a classical Ampère spin liquid
H. Diego Rosales, Emma M. Bizot, Flavia A. Gómez Albarracín et al.
Stability of energy gap of macroscopic quantum matter
Kangle Li, Liujun Zou
Field evolution of the multi-k magnetic states in NdB4 revealed by neutron diffraction
D. Brunt, N. Qureshi, E. Chan et al.
Interplay between Spin Stripes and Pairing Crossover in the Bilayer Hubbard Model
Zixuan Jia, Xuelei Sui, Shijie Hu et al.
Ni ordering in the van der Waals gap of Ni-intercalated 2H-NbS2: from disorder through 2×2 and 3×3 order to stripe order
Naveen Singh Dhami, Ricardo Guillermo Torres Ramirez, Gaurav Pransu et al.
Resonantly interacting 2e/3 anyons: a controlled microscopic theory of anyon superconductivity
Qingchen Li, Pavel A. Nosov, Zhaoyu Han et al.