Kwang‐Yong Choi
Sungkyunkwan University · 材料科学
研究室紹介
Professor Kwang-Yong Choi's research lab specializes in quantum magnetism and strongly correlated electron systems, focusing on exotic quantum phases in frustrated lattices and multiferroic materials. The lab investigates emergent phenomena such as chiral magneto-phononic modes, quantum spin liquids, and disorder-driven random-singlet states using advanced spectroscopic and thermodynamic techniques. Key research directions include the interplay between magnetism, lattice dynamics, and topology in complex oxides, particularly in materials like ZnₓFe₂₋ₓMo₃O₈ and Li₂Cu₂(MoO₄)₃. The lab combines experimental exploration with theoretical insights to uncover new states of quantum matter with potential applications in topological phononics and quantum information.
Research Overview
Research Output Trend
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Selected Papers
2ABSTRACT Chiral magneto‐phononic modes—hybridized vibrational states that carry angular momentum through coupling with magnetic degrees of freedom—offer a novel route for controlling magnetism and enabling topological phononics. Here, we report the magnetic switching of these hybridized chiral phonons, Zn x Fe 2‐ x Mo 3 O 8 , using helicity‐resolved magneto‐Raman spectroscopy. By tuning the Zn concentration across antiferromagnetic and ferrimagnetic regimes, we uncover two key phenomena: (i) a g
Star lattice, which can be visualized as a honeycomb network with each vertex replaced by a triangle, provides a rare platform for realizing exotic quantum states such as quantum spin liquids and disorder-driven random-singlet (RS) states. Herein, we investigate the ground-state properties of the three-dimensional (3D) stuffed hyper-star lattice Li$_2$Cu$_2$(MoO$_4$)$_3$, which exhibits a crossover from short-range spin correlations to a disorder-driven RS-like state below $T^{*}\sim$15.8 K. The
Research Areas
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