Faculty Research Profile
Changhee Sohn
학력
Seoul National University Ph.D., Physics (Aug. 2015)
Seoul National University B.S., Physics (Feb. 2010)
주요 경력
• UNIST
Associate Professor (Sep. 2024 - current)
• UNIST
Assistant Professor (Feb. 2019 - Aug. 2024)
• Oak Ridge National Laboratory
Postdoctoral researcher (July 2016 - Feb. 2019)
• Seoul National University
Postdoctoral researcher (Sep. 2015 - June 2016)
수상/학회/외부활동
• Brain Korea 21 Scholarship, 2013
• Brain Korea 21 Scholarship, 2015
• Supp perform award, Oak Ridge National Laboratory, 2017
• 봄비물리학상, 2020
• 한국자기학회 평의원, 양자자성분과 부위원장
• 한국물리학회 부실무이사, 2021-2024
언옵테이늄 연구실
Laboratory for Unobtainable Functional Oxides
저희 연구실은 응집물질물리학 실험 연구 그룹으로, 양자 물질에서 나타나는 다체계 및 위상학적 현상과 그 응용 가능성에 집중하고 있습니다. 이를 위해 자연계에서는 일반적으로 존재하지 않는 물질을 실험적으로 설계하고, 새로운 물질상을 구현하는 연구를 주로 수행합니다. 최근 저희가 집중하고 있는 연구는 1) 거시적 양자얽힘을 나타내어 위상 큐비트 구현이 가능한 위상 정렬 상태, 2) 차세대 스핀트로닉스 및 뉴로모픽 메모리를 위한 새로운 대칭성 깨짐 상태, 3) 독특한 광학적 특성을 지니며 포토닉스 분야에 응용 가능한 광학 물질 등입니다.
We are an experimental condensed matter physics group focusing on many-body and topological phenomena in quantum materials and their potential applications. To this end, we design materials that do not exist in nature and realize new phases of matter through experiments. In particular, our research explores 1) Topologically ordered phases for topological qubits, which exhibit macroscopic quantum entanglement and fractional excitations, 2) Novel broken symmetry phases for next-generation spintronics and neuromorphic memory, 3)Optical materials with unique properties for advanced optics and photonics.
We are an experimental condensed matter physics group focusing on many-body and topological phenomena in quantum materials and their potential applications. To this end, we design materials that do not exist in nature and realize new phases of matter through experiments. In particular, our research explores 1) Topologically ordered phases for topological qubits, which exhibit macroscopic quantum entanglement and fractional excitations, 2) Novel broken symmetry phases for next-generation spintronics and neuromorphic memory, 3)Optical materials with unique properties for advanced optics and photonics.
연구분야
양자물질, 빛-물질 상호작용, 분광학, 산화물 이종구조, 차세대 소재 / Quantum materials, light-matter interaction, spectroscopy, oxide heterostructures, new functional materials
Quantum materials, light-matter interaction, spectroscopy, oxide heterostructures, new functional materials
연구 희망분야
양자물질, 빛-물질 상호작용, 분광학, 산화물 이종구조, 차세대 소재 / Quantum materials, light-matter interaction, spectroscopy, oxide heterostructures, new functional materials
Quantum materials, light-matter interaction, spectroscopy, oxide heterostructures, new functional materials
연구주제
1. 양자 물질: 다체계 양자 얽힘, 분수 입자, 위상 큐비트
(Quantum Materials: Many-body quantum entanglement, Fractional excitations, Topological qubits)
– 이종구조를 활용한 양자스핀액상 상태의 구현
– 스핀트로닉스 기법을 활용한 분수 입자의 검출 및 제어
– 위상 큐비트를 위한 기반으로서 얽힌 양자상 연구
2. 광학 물질: 첨단 광학 및 포토닉스를 위한 소재
(Optical Materials: Materials for advanced optics and photonics)
– 저차원 엑시톤, 거대 광학 이방성, 쌍곡선 분산
– 고감도 적외선 센싱을 위한 볼로미터 소재 설계
– 광 변조기를 위한 새로운 소재 개발
3. 강성 물질: 미래 메모리 및 로직 응용을 위한 새로운 대칭성 깨짐 상태
(Ferroic Materials: Emerging ferroic systems for future memory and logic applications)
– 차세대 스핀트로닉스를 위한 교자성 소재
– 다중 레벨 및 뉴로모픽 메모리 구현을 위한 소재
Designing and discovering phases of matter that do not naturally exist
1. Quantum Materials: Many-body quantum entanglement, Fractional excitations, Topological qubits
– Realization of quantum spin liquid states via heterostructure engineering
– Detections and manipulations of fractional excitations through spintronics techniques
– Exploration of entangled quantum phases as platforms for topological qubits
2. Optical Materials: Materials for advanced optics and photonics
– Low-dimensional excitions, giant optical anisotropy, hyperbolic dispersion
– Design of bolometric materials for high-sensitivity infrared sensing
– Development of novel materials for optical modulators
3. Ferroic Materials: Emerging ferroic systems for future memory and logic applications
– Altermagnetic materials for next-generation spintronics
– Materials for multi-level and neuromorphic memory devices
논문
Physical Review Letters, Tunneling magnetoresistance in altermagnetic RuO2-based magnetic tunnel junctions (2025)
Nature Communications, Optical detection of bond-dependent and frustrated spin in the two-dimensional cobalt-based honeycomb antiferromagnet Cu3Co2SbO6 (2025)
Science Advances, Suppression of antiferromagnetic order by strain-enhanced frustration in honeycomb cobaltate (2024)
Nano Letters, Extended Oxygen Octahedral Tilt Proximity near Oxide Heterostructures (2023)
Physical Review B, Honeycomb oxide heterostructure as a candidate host for a Kitaev quantum spin liquid (2023)