Chiral 3Q magnetic ordering in two-dimensional magnet Cox-TaS2Title: Topological 3Q magnetic ordering in two-dimensional magnet Co<sub>1/3</sub>-TaS<sub>2</sub>
ORAL · Invited
Abstract
Je-Geun Park
Department of Physics & Astronomy, Seoul National University
2D magnets, particularly van der Waals magnets, have been attracting much attention worldwide since they were first reported by a series of papers in 2016. Over the past few years, much of the attention has been on discovering new materials with novel ground states, and the current focus is on topological magnets. Antiferromagnetic metallic Co1/3-TaS2 is the latest addition to this new class of 2D magnets. It exhibits a considerable anomalous Hall effect (AHE), which was recently assigned to a rather unusual form of 3Q tetrahedral structure, a highest-density skyrmion phase. We also found that this 3Q phase is extremely sensitive to external variables like Co concentration and drastic Fermi surface change. As another demonstration of this controllability, we demonstrated that the ground state can be changed dramatically by controlling carrier density via gating.
Department of Physics & Astronomy, Seoul National University
2D magnets, particularly van der Waals magnets, have been attracting much attention worldwide since they were first reported by a series of papers in 2016. Over the past few years, much of the attention has been on discovering new materials with novel ground states, and the current focus is on topological magnets. Antiferromagnetic metallic Co1/3-TaS2 is the latest addition to this new class of 2D magnets. It exhibits a considerable anomalous Hall effect (AHE), which was recently assigned to a rather unusual form of 3Q tetrahedral structure, a highest-density skyrmion phase. We also found that this 3Q phase is extremely sensitive to external variables like Co concentration and drastic Fermi surface change. As another demonstration of this controllability, we demonstrated that the ground state can be changed dramatically by controlling carrier density via gating.
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Publication: Tetrahedral triple-Q ordering in metallic triangular lattice antiferromagnet Co1/3TaS2
Presenters
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Je-Geun Park
Seoul National University, Seoul Natl Univ
Authors
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Je-Geun Park
Seoul National University, Seoul Natl Univ