102 citations · 280 across the 21 of their papers we have counts for
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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…
A simple model for longitudinal electron transport during and after laser excitation: Emergence of electron resistive transport
Robert Meadows, Y. Xue, Nicholas Allbritton +1
Laser-driven electron transport across a sample has garnered enormous attentions over several decades, as it provides a much faster way to control electron dynamics. Light is an el…
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…
Electron transport under an ultrafast laser pulse: Implication for spin transport
Robert Meadows, Y. Xue, Nicholas Allbritton +1
Laser-driven electron transport across a sample has garnered enormous attentions over several decades, because it potentially allows one to control spin transports in spintronics.…
Strong and nearly 100 spin-polarized second-harmonic generation from ferrimagnet MnRuGa
Y. Q. Liu, M. S. Si, G. P. Zhang
Second-harmonic generation (SHG) has emerged as a promising tool for detecting electronic and magnetic structures in noncentrosymmetric materials, but 100 spin-polarized SHG ha…
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…
Optically- and thermally-driven huge lattice orbital and spin angular momenta from spinning fullerenes
G. P. Zhang, Y. H. Bai, Thomas F. George
Lattice vibration in solids may carry angular momentum. But unlike the intrinsic spin of electrons, the lattice vibration is rarely rotational. To induce angular momentum, one need…
Correlation Between Spin and Orbital Dynamics During Laser-Induced Femtosecond Demagnetization
G. P. Zhang, Mingqiang Gu, Y. H. Bai +2
Spin and orbital angular momenta are two intrinsic properties of an electron and are responsible for the physics of a solid. How the spin and orbital evolve with respect to each ot…
Ultrafast reduction in exchange interaction by a laser pulse: Alternative path to femtomagnetism
G. P. Zhang, Mingqiang Gu, X. S. Wu
Since the beginning of femtomagnetism, it has been hotly debated how an ultrafast laser pulse can demagnetize a sample and switch its spins within a few hundred femtoseconds, but n…
Femtosecond electron and spin dynamics probed by nonlinear optics
G. P. Zhang, W. Hübner
A theoretical calculation is performed for the ultrafast spin dynamics in nickel using an exact diagonalization method. The present theory mainly focuses on a situation where the i…
Ultrafast Spin Dynamics in Nickel
W. Hubner, G. P. Zhang
The spin dynamics in Ni is studied by an exact diagonalization method on the ultrafast time scale. It is shown that the femtosecond relaxation of the magneto-optical response resul…