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Monolayer van der Waals kagome lattice for high-temperature flat-band physics
Hyungkun Bong, Choongjae Won, Seongyong Lee +26
Kagome lattice materials host a remarkably rich landscape of novel quantum phenomena, all arising from the intrinsic interplay of topology, correlation, and frustration. While prev…
Nature of charge density wave in kagome metal ScV6Sn6
Seongyong Lee, Choongjae Won, Jimin Kim +9
Kagome lattice materials offer a fertile ground to discover novel quantum phases of matter, ranging from unconventional superconductivity and quantum spin liquids to charge orders…
Field-induced spin level crossings within a quasi-XY antiferromagnetic state in BaFeSiO
Minseong Lee, Rico Schoenemann, Hao Zhang +11
We present a high-field study of the strongly anisotropic easy-plane square lattice = 2 quantum magnet BaFeSiO. This compound is a rare high-spin antiferromag…
Orbital-selective time-domain signature of nematicity dynamics in the charge-density-wave phase of LaEuSrCuO
Martin Bluschke, Naman K. Gupta, Hoyoung Jang +23
Understanding the interplay between charge, nematic, and structural ordering tendencies in cuprate superconductors is critical to unraveling their complex phase diagram. Using pump…
Understanding temperature-dependent SU() spin dynamics in the antiferromagnet BaFeSiO
Seung-Hwan Do, Hao Zhang, David A. Dahlbom +9
Quantum magnets admit more than one classical limit and -level systems with strong single-ion anisotropy are expected to be described by a classical approximation based on SU($N…
Weak-coupling to strong-coupling quantum criticality crossover in a Kitaev quantum spin liquid -RuCl
Jae-Ho Han, Seung-Hwan Do, Kwang-Yong Choi +5
We report an unprecedented quantum criticality crossover representing two different universal scaling behaviors in a Kitaev quantum magnetic material -RuCl. -RuCl pre…
Charge order landscape and competition with superconductivity in kagome metals
Mingu Kang, Shiang Fang, Jonggyu Yoo +13
In kagome metals AV3Sb5 (A = K, Rb, Cs), three-dimensional charge order (3D-CO) is the primary instability that sets the stage for other collective orders to emerge, including unid…
Multiferroic-enabled magnetic exciton in 2D quantum entangled van der Waals antiferromagnet NiI2
Suhan Son, Youjin Lee, Jae Ha Kim +15
Matter-light interaction is at the center of diverse research fields from quantum optics to condensed matter physics, opening new fields like laser physics. A magnetic exciton is o…
Physical properties of a quasi-two-dimensional square lattice antiferromagnet BaFeSiO
Tae-Hwan Jang, Seung-Hwan Do, Minseong Lee +6
We report the magnetization (, ), specific heat (), and neutron powder diffraction results on a quasi-two-dimensional = 2 square lattice antiferromagnet Ba$…
Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
B. J. Kim, Hosub Jin, S. J. Moon +11
We investigated electronic structure of 5d transition-metal oxide Sr2IrO4 using angle-resolved photoemission, optical conductivity, and x-ray absorption measurements and first-prin…