260 citations · 1.9k across the 48 of their papers we have counts for
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Manipulating Topological Quantum Phase Transitions of Kitaev's Quantum Spin Liquids with Electric Fields
Pureum Noh, Kyusung Hwang, Eun-Gook Moon
Highly entangled excitations such as Majorana fermions of Kitaev quantum spin liquids have been proposed to be utilized for future quantum science and technology, and a deeper unde…
Majorana-fermion origin of the planar thermal Hall effect in the Kitaev magnet -RuCl
K. Imamura, S. Suetsugu, Y. Mizukami +11
The field-induced quantum disordered state of layered honeycomb magnet -RuCl is a prime candidate for Kitaev spin liquids hosting Majorana fermions and non-Abelian anyons. R…
Fractionalization induced structural domain patterns in U(1) quantum spin liquids
Hyeok-Jun Yang, Eun-Gook Moon, SungBin Lee
The emergence of fractionalized quasiparticles in quantum spin liquids has served a wealth of unconventional phenomena in frustrated magnets. In our work, we explore the various do…
Significant thermal Hall effect in the 3 cobalt Kitaev system
Heejun Yang, Chaebin Kim, Ysun Choi +9
Kitaev physics has recently attracted attention in condensed matter for its anticipated novel quantum spin liquid state. The thermal transport measurement is crucial for probing th…
Monolayer Kagome Metals AVSb
Sun-Woo Kim, Hanbit Oh, Eun-Gook Moon +1
Recently, layered kagome metals AVSb (A = K, Rb, and Cs) have emerged as a fertile platform for exploring frustrated geometry, correlations, and topology. Here, using first…
Construction of Entangled Many-body States via the Higgs Mechanism
Pureum Noh, Eun-Gook Moon
We provide a guiding principle to generate entanglement of quantum many-body states by applying key ideas of the Higgs mechanism to systems without gauge structures. Unitary operat…
Exotic Thermal Transitions with Spontaneous Symmetry Breaking
Hanbit Oh, Eun-Gook Moon
We show that exotic spontaneous symmetry breaking appears in thermal topological phases by perturbing the exact solutions of quantum rotor models coupled to the three-dimensional t…
Rank-2 Toric Code in Two Dimensions
Yun-Tak Oh, Jintae Kim, Eun-Gook Moon +1
We study a two-dimensional spin model obtained by "Higgsing" the rank-2 U(1) lattice gauge theory (LGT) with scalar or vector charges on the L_x * L_y square lattice under the peri…
Advancing Hybrid Quantum-Classical Algorithms via Mean-Operators
Donggyu Kim, Pureum Noh, Hyun-Yong Lee +1
Entanglement in quantum many-body systems is the key concept for future technology and science, opening up a possibility to explore uncharted realms in an enormously large Hilbert…
Using Disorder to Identify Bogoliubov Fermi-Surface States
Hanbit Oh, Daniel F. Agterberg, Eun-Gook Moon
We argue that a superconducting state with a Fermi-surface of Bogoliubov quasiparticles, a Bogoliubov Fermi-surface (BG-FS), can be identified by the dependence of physical quantit…
Strong antiferromagnetic proximity coupling in a heterostructured superconductor SrVOFeAs
Jong Mok Ok, Chang Il Kwon, O. E. Ayala Valenzuela +10
We report observation of strong magnetic proximity coupling in a heterostructured superconductor SrVOFeAs, determined by the upper critical fields measurements…
Proximity-induced hidden order transition in a correlated heterostructure SrVOFeAs
Sunghun Kim, Jong Mok Ok, Hanbit Oh +10
Symmetry is one of the most significant concepts in physics, and its importance has been largely manifested in phase transitions by its spontaneous breaking. In strongly correlated…
Thermodynamic evidence for field-angle dependent Majorana gap in a Kitaev spin liquid
O. Tanaka, Y. Mizukami, R. Harasawa +8
The exactly-solvable Kitaev model of two-dimensional honeycomb magnet leads to a quantum spin liquid (QSL) characterized by Majorana fermions, relevant for fault-tolerant topologic…
Identification of a Kitaev Quantum Spin Liquid by Magnetic Field Angle Dependence
Kyusung Hwang, Ara Go, Ji Heon Seong +2
Quantum spin liquids realize massive entanglement and fractional quasiparticles from localized spins, proposed as an avenue for quantum science and technology. In particular, topol…
Lattice vibration as a knob for novel quantum criticality: Emergence of supersymmetry from spin-lattice coupling
SangEun Han, Junhyun Lee, Eun-Gook Moon
Control of quantum coherence in many-body system is one of the key issues in modern condensed matter. Conventional wisdom is that lattice vibration is an innate source of decoheren…
Instability of Bogoliubov Fermi-surfaces
Hanbit Oh, Eun-Gook Moon
Exotic quantum phases including topological states and non-Fermi liquids may be realized by quantum states with total angular momentum , as manifested in HgTe and pyrochlore…
Deconfined Thermal Phase Transitions with Gauge Structures
Eun-Gook Moon
Fathoming deconfined phases is one of the key issues in modern condensed matter. Striking many-body effects including massive quantum entanglement and coherence may be realized as…
Multi-scale Quantum Criticality driven by Kondo-lattice Coupling in Pyrochlore Systems
Hanbit Oh, Sangjin Lee, Yong Baek Kim +1
Pyrochlore systems () with -site rare-earth local moments and -site conduction electrons offer excellent material platforms for the discovery of exotic…
Emergent Anisotropic Non-Fermi Liquid at a Topological Phase Transition in Three Dimensions
SangEun Han, Changhee Lee, Eun-Gook Moon +1
Understanding correlation effects in topological phases and their transitions is a cutting-edge area of research in recent condensed matter physics. We study topological quantum ph…
Vestiges of Topological Phase Transitions in Kitaev Quantum Spin Liquids
Ara Go, Jun Jung, Eun-Gook Moon
We investigate signatures of topological quantum phase transitions (TQPTs) between the quantum spin liquids (QSLs). In two spatial dimensions, QSLs and their TQPTs are…
Quantum Criticalities with Infinite Anisotropy in Topological Phase Transitions between Dirac and Weyl Semi-metals
SangEun Han, Gil Young Cho, Eun-Gook Moon
We study quantum phase transitions (QPTs) associated with splitting nodal Fermi points, motivated by topological phase transitions between Dirac and Weyl semi-metals. A Dirac point…
Exotic Symmetry Breaking Transitions in 2D Correlated Systems
Sangjin Lee, Jun Jung, Ara Go +1
The Landau paradigm of phase transitions is one of the backbones in critical phenomena. With a symmetry, it describes the Ising universality class whose central charge is one…
Long-range Coulomb Interaction effects on Topological Phase Transitions between Semi-metals and Insulators
SangEun Han, Eun-Gook Moon
Topological states may be protected by a lattice symmetry in a class of topological semi-metals. In three spatial dimensions, the Berry flux around gapless excitations in momentum…
Spin-lattice Coupling in U(1) Quantum Spin Liquids
Sangjin Lee, Eun-Gook Moon
Quantum spin liquids (QSLs) are exotic phases with intrinsic massive entanglements. Instead of microscopic spins, fractionalized particles and gauge fluctuations are emergent, reve…