121 citations · 171 across the 7 of their papers we have counts for
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Raman Circular Dichroism Reveals Higher-Order Quantum Geometry of Magnons
Yong Chan Kim, Youngsu Choi, Kwang-Yong Choi +1
We develop a gauge-invariant framework that relates two-magnon Raman circular dichroism (RCD) to higher-order magnon quantum geometry. In the magnon band basis, the Raman operator…
Plaid-Like Spin Splitting and Chirality of Magnon Bands in Antiferromagnetic MnTe
Dirk Wulferding, Daehyeon An, Jiwon Choi +8
Altermagnets constitute an emerging class of magnetic materials that combine compensated antiferromagnetic order with spin-split excitations arising from crystalline symmetries. De…
One-ninth magnetization plateau stabilized by spin entanglement in a kagome antiferromagnet
Sungmin Jeon, Dirk Wulferding, Youngsu Choi +11
The spin-1/2 antiferromagnetic Heisenberg model on a Kagome lattice is geometrically frustrated, which is expected to promote the formation of many-body quantum entangled states. T…
Thermally populated versus field-induced triplon bound states in the Shastry-Sutherland lattice SrCu(BO)
Dirk Wulferding, Youngsu Choi, Seungyeol Lee +6
The Shastry-Sutherland compound SrCu(BO) constituting orthogonally coupled dimers harbors a singlet ground state. The confluence of strong interdimer interaction…
Emergent nematicity and intrinsic vs. extrinsic electronic scattering processes in the kagome metal CsVSb
Dirk Wulferding, Seungyeol Lee, Youngsu Choi +9
Fermi surface fluctuations and lattice instabilities in the 2D metallic kagome superconductor CsVSb are elucidated via polarization-resolved Raman spectroscopy. The presenc…
Magnon bound states vs. anyonic Majorana excitations in the Kitaev honeycomb magnet -RuCl
Dirk Wulferding, Youngsu Choi, Seung-Hwan Do +5
The pure Kitaev honeycomb model harbors a quantum spin liquid in zero magnetic fields, while applying finite magnetic fields induces a topological spin liquid with non-Abelian anyo…