Correlated interstitial subsystem
We analyze Coulomb interaction, hybridization and localization in the electronic states that form the electride subsystem.
Metal Optics Laboratory · M.N. Mikheev Institute of Metal Physics, UB RAS
Many-body physics of interstitial electrons
We use advanced first-principles and many-body approaches to study how electrons in the voids, channels and layers of crystals determine the electronic, magnetic and quantum properties of electrides.
Research & results →Our focus
A coherent research program in electride physics
Magnetism without magnetic atoms
We study how confined interstitial electrons acquire local moments, magnetic order and correlated quantum behavior.
Low-dimensional quantum effects
We investigate the consequences of confinement, pressure, layer number and interfaces for transport and magnetic phases.
Research & results
Questions that guide the work
When does an interstitial state become localized?
We connect crystal geometry, hybridization and Coulomb interaction to the evolution from extended electride bands to quasi-atomic electronic states.
How do interstitial electrons become magnetic?
We distinguish band spin polarization, fluctuating local moments and correlated magnetic order in a subsystem spatially separated from the atomic framework.
How can low-dimensionality tune quantum phases?
We study pressure, strain, stacking and interfaces as controlled changes to confinement, charge transfer and the interstitial bandwidth.
Selected results
Research & results
Calcium under pressure
DFT+DMFT reproduces the observed low-temperature sequence of high-pressure calcium phases, showing that even weak Coulomb correlations matter for a correlated metal.
DOI ↗Correlated Ca₂N
In two-dimensional Ca₂N, local correlations renormalize interstitial bands near the Fermi level and place ferromagnetic and antiferromagnetic tendencies in competition.
DOI ↗Interstitial magnetic centres
For β-Yb₅Sb₃, a cavity-centered low-energy description and DMFT reproduce the insulating state, local moments and magnetic susceptibility associated with interstitial electrons.
DOI ↗From monolayer BaF to bilayers and interfaces
In ultrathin BaF-based electrides, orbital composition, stacking and interface charge transfer control ferromagnetic, antiferromagnetic and correlation-driven states.
DOI ↗