청즈강

 
청즈강 개인소개
소개:
2017년 9월, 중국과학원 물리연구소, 특채연구원
2013년 12월~2017년 8월, University of Alberta, Canada, 박사 후
2013년 5월~2013년 11월, Pennsylvania State University, US, 박사 후
2006년 8월~ 2013년 5월, Pennsylvania State University, US, 박사
2002년 9월~2006년 6월, 우한대학, 본과
 
 
주요 연구 방향:
극히 낮다온실험물리, 위상 양자재료, 양자액체와 양자고체
 
과거의 주요 사업 및 성과:
헬륨 원자는 가장 가벼운 단원자 분자로 영점 운동 에너지가 크다.원자 간 판데르발스는 상호작용이 매우 약해 액체와 고체가 저온에서 독특한 양자 특성을 띠게 해 '양자 액체와 고체'(Quantum Fluids and Solids-QFS)로 불린다.QFS는 응집 상태와 저온 물리의 핵심 연구 분야이며 노벨 물리학상은 여섯 차례에 걸쳐 이 분야에 수여됐다.
 
본인은 그동안 희석냉방 기술을 이용해 극저온 조건에서 양자 액체와 양자 고체의 기이한 물리적 성질을 실험하는 연구를 주로 해왔는데, 고체 중 초류상, 결함운동, 열역학적 성질에 대한 연구를 주로 해왔다.
이론은 60년 만에 처음으로 제기된 지 입증 초고체 양자 현상에 존재할 수 있는 실험 증거를 흘리고 발생한 체계적인 연구를 했다 구조와 저온 물리학계는 논술이 새로운 초고체의 탐구를 일으켰다.
압전도자기 변위 발생 장치를 개발하여 극저온에서 양자 고체의 탄성과 소성 변형 성질을 연구하고, 위상 착선의 눈사태 효과와 이와 관련된 음학적 유발 효과를 발견하였으며, 또한 고체 헬륨에서 동위원소 불순물과 위상 착선 사이의 상호작용을 연구하였다.
마이크로나노급 수감 중 양자 고체의 비열을 정밀 측정해 결함과 불순물이 양자 고체에서 움직인다는 열역학적 증거가 처음 나왔다.
열수송 측정을 통해 극저온에서 양자 액체와 무정형 재료인 이중 에너지급 시스템 간의 상호작용과 이로 인한 열전도율의 이상 저하가 최초로 발견되었다.
 
 
대표적인 논문 및 특허:
Z. G. Cheng*, J. Beamish*, In situ monitoring distribution and migration of  3He in liquid-solid 4He mixtures, Phys. Rev. Research, 3, 023136 (2021)
J. Chen, Z. Zhou, H. Liu, C. Bian, Y. Zou, Z. Wang, Z. Zhao, K. Wu, H. Yang, C. Shen, Z. G. Cheng, L. Bao*, H.-J. Gao, One-dimensional weak antilocalization effect in 1T'-MoTe2 nanowires grown by chemical vapor deposition, J. Phys. Condens. Matter 33, 185701 (2021)
F. Li*, Y. Zou, M. Han, K. Foyevtsova, H. Shin, S. Lee, C. Liu, K Shin, S. D. Albright, R. Sutarto, F. He, B. A. Davidson, F. J. Walker, C. H. Ahn, Y. Zhu, Z. G. Cheng, I. Elfimov, G. A. Sawatzky*, K. Zou*, "Single-crystalline epitaxial TiO film: A metal and superconductor, similar to Ti metal", Science Advances 7 (2), eabd4248 (2021)
S. Xu, Y. Zou, J. Sun, Z. Liu, X. Yu, J. Gouchi, Y. Uwatoko, Z. G. Cheng*, B. Wang*, J. Cheng*, “Physical properties and pressure-induced superconductivity in the single-crystalline band insulator SnO”, Phys. Rev. B 101, 104501 (2020)
Z. G. Cheng* and J. Beamish* “Mass flow through solid 3He in the bcc phase”, Phys. Rev. Lett. 121, 225304 (2018)
Z. G. Cheng* and J. Beamish* “Plastic deformation in a quantum solid: Dislocation avalanches and creep in helium”, Phys. Rev. Lett. 121, 055301 (2018)(selected as Editor’s Suggestion).
Z. G. Cheng and J. Beamish “Defect motion in a quantum solid with spin : hcp 3He” Phys. Rev. B 95, 180103(R) (2017)
Z. G. Cheng and J. Beamish “Compression-driven mass flow in bulk solid 4He” Phys. Rev. Lett. 117, 025301 (2016) (selected as Editor’s Suggestion).
Z. G. Cheng*, F. Souris, and J. Beamish “Shear modulus and dislocations in bcc solid 3He” J. Low Temp. Phys. 183, 99 (2016).
Z. G. Cheng*, J. Beamish, A. D. Fefferman, F. Souris, S. Balibar, and V. Dauvois “Helium mass flow through a solid-superfluid-solid junction” Phys. Rev. Lett. 114, 165301 (2015).
Z. G. Cheng, N. Mulders, and M. H. W. Chan* “Heat capacity of solid 4He and 3He-4He mixture grown in aerogel” Phys. Rev. B 90, 224101 (2014).
Z. G. Cheng and M. H. W. Chan* “Threefold reduction in thermal conductivity of Vycor glass due to adsorption of liquid 4He” New J. Phys. 15, 063030 (2013).
J. T. West, X. Lin, Z. G. Cheng, and M. H. W. Chan “Supersolid behavior in confined geometry” Phys. Rev. Lett. 102, 185302 (2009).
X. Lin, A. C. Clark, Z. G. Cheng, and M. H. W. Chan “Heat capacity peak in solid 4He: Effects of disorder and 3He impurities” Phys. Rev. Lett. 102, 125302 (2009).
 
 
현재의 연구과제 및 전망:
1. 위상 양자 재료의 극저온에서의 전기 송운 및 열역학적 성질 연구:
우리는 위상적인 성질을 가진 재료가 극저온에서 전기 운송, 열수송과 열역학적 성질을 가지고 있는 연구를 통해 재료의 에너지 대역 구조를 판단하고 양자 기구를 구조하여 양자 컴퓨팅에 필요한 기본적인 조작을 실현한다. 구체적인 연구 체계는 1.박막 소재 중 전기 송수송 성질: 초전도성, 위상 에너지 대역 구조 등 2.양자 재료의 극저온 열수송 성질 3.양자 재료의 극저온 비열 측정 등이다.
 
2. 양자 액체와 양자 고체 연구(헬륨 물리):
우리는 양자 액체와 양자 고체 중 일련의 기이한 양자 현상에 주목한다.양자 고체 중 초류상, 양자 고체 중 결함운동, 초류액 헬륨 표면의 전자상태를 포함한다.
 
기존 조건:
 
 
극저온강자기장측정시스템 : 무액헬륨희석 냉방기(최저온 8mK, 최고자기장 14T), 저통여과선(-100dB@300MHz)
미납 부품 가공설비: 전자빔의 유출각식, 전자빔 코팅, 열증발 코팅, 샘플이전장치 등 
 
 
 
대학원생 양성 상황:
      매년 작성하다석박사 과정 대학원생이나 박사과정 1~2명을 모집해 극저온 양자재와 헬륨 물리실험에 뜻이 있는 학생에게 연락하기 바란다.
 
연락처:
010-82649850
 
Email:
zgcheng@iphy.ac.cn