Journal
PHYSICAL REVIEW B
Volume 96, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.96.121106
Keywords
-
Funding
- Gauss Centre for Supercomputing
- NSF [PHY-1125915]
- [DFG-SFB 1170]
- [ERC-StG-336012]
Ask authors/readers for more resources
Double Dirac fermions have recently been identified as possible quasiparticles hosted by three- dimensional crystals with particular nonsymmorphic point-group symmetries. Applying a combined approach of ab initio methods and dynamical mean-field theory, we investigate how interactions and double Dirac band topology conspire to form the electronic quantum state of Bi2CuO4. We derive a downfolded eight-band model of the pristine material at low energies around the Fermi level. By tuning the model parameters from the free band structure to the realistic strongly correlated regime, we find a persistence of the double Dirac dispersion until its constituting time-reversal symmetry is broken due to the onset of magnetic ordering at the Mott transition. Our calculations suggest that the double Dirac fermions in Bi2CuO4 can be restored by experimentally accessible hydrostatic pressures. In light of the growing attention to the topological quantum chemistry approach, our results on Bi2CuO4 show how many-body effects must be included beyond the static mean-field level for reliable predictions on new materials.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available