3 papers
cond-mat.mtrl-sci2025
Gauge-invariant absolute quantification of electric and magnetic multipole densities in crystals
R. Winkler, U. Zülicke
Electric and magnetic multipole densities in crystalline solids, including the familiar electric dipole density in ferroelectrics and the magnetic dipole density in ferromagnets, a…
cond-mat.mtrl-sci2025
Time inversion symmetry in the Dirac and Schrödinger-Pauli theories
R. Winkler, U. Zülicke
The Schrödinger-Pauli theory is generally believed to give a faithful representation of the nonrelativistic and weakly relativistic limit of the Dirac theory. However, the Schröd…
cond-mat.mtrl-sci2025
Standard model of electromagnetism and chirality in crystals
R. Winkler, U. Zülicke, U. Zülicke
We present a general, quantitative theory of electromagnetism and chirality in crystals. Symmetry is its guiding principle, enabling us to consider macroscopic multipole densities…