58 citations · 110 across the 10 of their papers we have counts for
11 papers
Generalized length-gauge time-dependent Liouville equation
G. P. Zhang, M. S. Si
The length-gauge (LG) time-dependent Liouville equation is a major workhorse to simulate ultrafast dynamics. The equation features the commutator between the density operator $\hat…
Beyond Local Berry Geometry: A First-Principles Finite-Momentum Theory of Electronic Position
M. S. Si, Y. Q. Li, G. P. Zhang
Electronic position controls how a crystal polarizes and responds to an external field. In crystals, it is usually described through local changes of electronic states in momentum…
Revisiting the matrix elements of the position operator in the crystal momentum representation
M. S. Si, G. P. Zhang
Fewer operators are more fundamental than the position operator in a crystal. But since it is not translationally invariant in crystal momentum representation (CMR), how to properl…
Gateway to all-optical spin switching in Heusler ferrimagnets: Pancharatnam-Berry tensor and magnetic moment ratio
G. P. Zhang, Y. Q. Liu, M. S. Si +4
All-optical spin switching (AOS) is a new phenomenon found in a small group of magnetic media, where a single laser pulse can switch spins from one direction to another, without as…
Nonlinear harmonic spectra in bilayer van der Waals antiferromagnets CrX
Y. Q. Liu, M. S. Si, G. P. Zhang
Bilayer antiferromagnets CrX (X Cl, Br, and I) are promising materials for spintronics and optoelectronics that are rooted in their peculiar electronic structures. Howeve…
First-principles insights into all-optical spin switching in the half-metallic Heusler ferrimagnet MnRuGa
G. P. Zhang, Y. H. Bai, M. S. Si +1
All-optical spin switching (AOS) represents a new frontier in magnetic storage technology -- spin manipulation without a magnetic field, -- but its underlying working principle is…