585 citations · 3.9k across the 41 of their papers we have counts for
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Quantum Imaging of Single-Atom Spin-Splitting in a Monolayer Semiconductor
Caleb Z. Zerger, Alex W. Contryman, Changmin Lee +8
Theoretical work has suggested that monolayer MoS2 doped with Mn should behave as a two-dimensional dilute magnetic semiconductor, which would open up possibilities for spintronic…
Observation of a phase transition within the domain walls of ferromagnetic Co3Sn2S2
Changmin Lee, Praveen Vir, Kaustuv Manna +5
The ferromagnetic phase of CoSnS is widely considered to be a topological Weyl semimetal, with evidence for momentum-space monopoles of Berry curvature from transport a…
Direct Measurement of Helicoid Surface States in RhSi using Nonlinear Optics
Dylan Rees, Baozhu Lu, Yue Sun +6
Despite the fundamental nature of the edge state in topological physics, direct measurement of electronic and optical properties of the Fermi arcs of topological semimetals has pos…
Current-induced second harmonic generation in inversion-symmetric Dirac and Weyl semimetals
Kazuaki Takasan, Takahiro Morimoto, Joseph Orenstein +1
Second harmonic generation (SHG) is a fundamental nonlinear optical phenomenon widely used both for experimental probes of materials and for application to optical devices. Even-or…
Observation of Topological Photocurrents in the Chiral Weyl Semimetal RhSi
Dylan Rees, Kaustuv Manna, Baozhu Lu +6
Weyl semimetals are crystals in which electron bands cross at isolated points in momentum space. Associated with each crossing point (or Weyl node) is an integer topological invari…
Spin Hall effect in 2D metallic delafossite PtCoO and vicinity topology
Sota Kitamura, Hidetomo Usui, Robert-Jan Slager +9
The two-dimensional (2D) metal PtCoO is renowned for the lowest room temperature resistivity among all oxides, close to that of the top two materials Ag and Cu. In addition, we…
Semiclassical theory of nonlinear magneto-optical responses with applications to topological Dirac/Weyl semimetals
Takahiro Morimoto, Shudan Zhong, Joseph Orenstein +1
We study nonlinear magneto-optical responses of metals by a semiclassical Boltzmann equation approach. We derive general formulas for linear and second order nonlinear optical effe…
Coherent Propagation of Spin Helices in a Quantum-Well Confined Electron Gas
Luyi Yang, J. D. Koralek, J. Orenstein +3
We use phase-resolved transient grating spectroscopy to measure the propagation of spin helices in a high mobility -GaAs/AlGaAs quantum well with an applied in-plane electric fi…
Doppler velocimetry of spin propagation in a two-dimensional electron gas
Luyi Yang, J. D. Koralek, J. Orenstein +3
Controlling the flow of electrons by manipulation of their spin is a key to the development of spin-based electronics. While recent demonstrations of electrical-gate control in spi…
Random walk approach to spin dynamics in a two-dimensional electron gas with spin-orbit coupling
Luyi Yang, J. Orenstein, Dung-Hai Lee
We introduce and solve a semi-classical random walk (RW) model that describes the dynamics of spin polarization waves in zinc-blende semiconductor quantum wells. We derive the disp…
Confinement-induced Berry phase and helicity-dependent photocurrents
J. E. Moore, J. Orenstein
The photocurrent in an optically active metal is known to contain a component that switches sign with the helicity of the incident radiation. At low frequencies, this current depen…
Non-diffusive spin dynamics in a two-dimensional electron gas
C. P. Weber, J. Orenstein, B. Andrei Bernevig +3
We describe measurements of spin dynamics in the two-dimensional electron gas in GaAs/GaAlAs quantum wells. Optical techniques, including transient spin-grating spectroscopy, are u…
Observation of spin Coulomb drag in a two-dimensional electron gas
C. P. Weber, N. Gedik, J. E. Moore +3
An electron propagating through a solid carries spin angular momentum in addition to its mass and charge. Of late there has been considerable interest in developing electronic devi…