西安交通大学理学院导师教师师资介绍简介-王喆

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Home - 王喆Welcome
Welcome to the research group of Quantum Materials and Devices in School of Physicsat Xi'an Jiaotong University. We are interested in understanding electronic and quantum properties of low-dimensinoal systems by nano-device fabrication and electronic transport measurements. Please visit "Research" for more information.

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Research - 王喆Research (研究简介)
We are group of condensed matter experimentalists with interest in electronic properties of low-dimensional systems. Through state-or-art nano-fabrication and ultra-low noise low temperature electronic transport measurements, we aim to discover new phenomena and understand the underlying physics. We hope our work eventually will be relevant for applications, such as in sensing and in the storage of information. In the following, we show several examples of our research projects:

Magnetism in two dimensions (二维磁性)
Long-range magnetic order in two dimensions has been at the heart of fundamental research in condensed matter physics, and is also crucial for future ultra-high density spintronic devices. However, experimental realization of two dimensional (2D) magnetism was extremely difficult until the successful isolation of first 2D magnet from van der Waals materials CrI3 in 2017. In our group, we mainly use electrical measurement methods to probe the magnetic properties of 2D magnets, reveal new phenomena and understand the underlying physics. For example, through tunneling magnetoresistance measurement, we determined the phase diagram of layered antiferromagnet CrCl₃ and found interesting even-odd effect, we have demonstrated the persistence of magnetism in atomically thin MnPS₃ crystals. In collaboration with other groups, we also investigate 2D magnetism with optical measurement methods, such as scanning single-spin magnetometry and magnetic circular dichroism.

Reference:
Z. Wang, et al. “Determining the phase diagram of atomically thin layered antiferromagnet CrCl₃” Nature Nanotechnology 14, 1116-1122, (2019)
L. Thiel, et al. “Probing magnetism in 2D materials at the nanoscale with single-spin microscopy” Science 364, 973-976, (2019)
G. Long, et al. “Persistence of Magnetism in Atomically Thin MnPS₃ Crystals” Nano Letters 20, 2452-2459 (2020)
N. Ubrig, et al. “Low-temperature monoclinic layer stacking in atomically thin CrI₃ crystals” 2D Materials, 7, 015007 (2020)

2D spintronic devices (二维自旋电子器件)
Spintronic devices utilize spin instated of charge to store and process information, so that they can in principle offer low-power consumption and ultrafast speed. 2D materials are ideal candidates for fabricating ultra-high density spintronic devices, because 2D materials can be high quality even at atomically thin level and the interfaces of heterostructures can be atomically sharp. In our group, we are designing and fabricating different types of spintronic devices based on 2D materials, including classic magnetic tunneling junctions (MTJs) with ultra-thin barrier and new type of giant magnetoresistance devices constituted by multi-spin-filters.
Reference:
Z. Wang, et al. “Very large tunneling magnetoresistance in layered magnetic semiconductor CrI₃” Nature Communications 9, 2516, (2018)
Z. Wang, et al. “Tunneling Spin Valves Based on Fe₃GeTe₂/hBN/Fe₃GeTe₂ van der Waals Heterostructures” Nano Letters 18, 4303-4308, (2018)

Quantum Transport in Graphene (石墨烯中的量子输运)
Because of the Dirac nature of its charge carriers and the presence of two valleys, graphene is the first predicted two-dimensional topological insulator. Topological state characteristics have not been observed experimentally, because the strength of the intrinsic spin-orbit interaction (SOI) is too weak. We proposed that the strength of SOI in graphene could be strongly enhanced through the proximity effect from transition metal dichalcogenides (TMDs) substrate. The enhancement of SOI was unambitiously demonstrated by the observation of weak anti-localization effect, and the type and amplitude of induced SOI was obtained by combining measurements of Shubnikov-de Haas oscillations and theoretical calculations.
Reference:
Z. Wang, et al. “Strong interface-induced spin-orbit interaction in graphene on WS₂” Nature Communications 6, 8339 (2015)
Z. Wang, et al. “Origin and magnitude of ‘designer’ spin-orbit interaction in graphene on semiconducting transition metal dichalcogenides”, Physical Review X, 6, 041020 (2016)

Superconductivity in one dimensional carbon nanotubes (一维碳纳米管系统中的超导)
Nano-structuring is a well-known method to engineer material’s property, but introducing superconductivity is not within its scope. When graphene rolls into nanotube, it is predicted that the electron phonon interaction potentially will be enhanced by its curvature thus lead to superconductivity. Two types of superconducting resistive behaviors was observed in 4 Angstrom single wall carbon nanotubes, one is quasi one dimensional fluctuation superconductivity with thermally activated phase slips. Another one is the quasi 1D to 3D superconducting crossover transition, which is attributed to a Berezinskii–Kosterlitz–Thouless like transition that establishes quasi-long-range order in the transverse plane.
Reference:
R. Lortz, et al. “Superconducting characteristics of 4-Angstrom carbon nanotube-zeolite composite” Proc. Natl. Acad. Sci., 106, 7299-7303 (2009).
Z. Wang, et al. “Superconductivity in 4-Angstrom carbon nanotubes-A short review” Nanoscale, 4, 21 (2012)
Z. Wang, et al. “Superconducting resistive transition in coupled arrays of 4 Angstrom carbon nanotubes” Physical Review B, 81, 174530 (2010)
W. Shi, et al. “Superconductivity in Bundles of Double-Wall Carbon Nanotubes” Scientific Reports 2, 625 (2012)

Publications - 王喆Publications (期刊论文)
* for co-corresponding authorship, ^#for equal contribution

2020

26. "Persistence of Magnetism in Atomically Thin MnPS₃Crystals"
G. Long^#, H. Henck^#, M. Gibertini, D. Dumcenco, Z. Wang, T. Taniguchi, K. Watanabe, E. Giannini,A. F. Morpurgo*
Nano Letters, 20, 4, 2452-2459 (2020) https://doi.org/10.1021/acs.nanolett.9b05165
25.“Low-temperature monoclinic layer stacking in atomically thin CrI3crystals”
N. Ubrig*,Z. Wang, J. Teyssier,T.Taniguchi, K. Watanabe, E. Giannini, A. F. Morpurgo, M. Gibertini*
2D Materials, 7, 015007 (2020) https://doi.org/10.1088/2053-1583/ab4c64

2019

24. “Determining the phase diagram of atomically thin layered antiferromagnet CrCl3”
Z. Wang*, M. Gibertini*, D. Dumcenco, T. Taniguchi, K. Watanabe, E. Giannini, A. F. Morpurgo*
Nature Nanotechnology, 14, 1116–1122 (2019) https://doi.org/10.1038/s41565-019-0565-0 News & Views

23. “Probing magnetism in 2D materials at the nanoscale with single spin microscopy”
L.Thiel, Z. Wang, M.A. Tschudin, D. Rohner, I. Gutierrez, N. Ubrig, M. Gibertini, E. Giannini, A.F. Morpurgo, P. Maletinsky*
Science, 364, 973-976 (2019) https://doi.org/10.1126/science.aav6926

2018
22. “Tunneling spin valves based on Fe₃GeTe₂/hBN/ Fe₃GeTe₂ van der Waals heterostructures”
Z. Wang*, D. Sapkota, T.Taniguchi, K. Watanabe, D. Mandrus, A. F. Morpurgo*
Nano Letters, 7, 4303-4308 (2018) https://doi.org/10.1021/acs.nanolett.8b01278
21. “Very large tunneling magnetoresistance in layered magnetic semiconductor CrI₃”
Z. Wang*, I. Gutierrez, N. Ubrig, M. Kroner, M. Gibertini, T. Taniguchi, K. Watanabe, A. Imamoglu, E. Giannini, A. F. Morpurgo*
Nature Communications, 9, 2516 (2018) https://doi.org/10.1038/s41467-018-04953-8

2008-2017
20. “Origin and magnitude of designer spin-orbit interaction in graphene on semiconducting transition metal dichalcogenides”
Z. Wang*, D.-K. Ki, J. Y. Khoo, D. Mauro, H. Berger, L. S. Levitov and A. F. Morpurgo*
Physical Review X, 6，041020 (2016) https://doi.org/10.1103/PhysRevX.6.041020
19. “Strong interface-induced spin-orbit interaction in graphene on WS₂”
Z. Wang, D.-K. Ki, H. Chen, H. Berger, A. H. MacDonald, and A. F. Morpurgo*
Nature Communications 6, 8339 (2015) https://doi.org/10.1038/ncomms9339
18. “Theoretical Study of Superconductivity in 4-Angstrom Carbon Nanotube Arrays”
T. Zhang, M. Y. Sun, Z. Wang, W. Shi, R. Lortz, Z. K. Tang, N. Wang and P. Sheng
Chapter 1 of Carbon-based Superconductors: Toward high-T_c Superconductivity
Edited by Juni Haruyama, Pan Stanford Publishing, (2015)

17. “New developments in the growth of 4 Angstrom carbonnanotubes in linear channels of zeolite template”
Q. H. Chen, Z. Wang, Y. Zheng, W. Shi, D. D. Wang, Y. C. Luo, B. Zhang, J. M. Lu, H. J. Zhang, J. Pan, C. Y. Mou, Z. K. Tang and
P. Sheng
Carbon, 76, 401 (2014) https://doi.org/10.1016/j.carbon.2014.04.094

16. “Negative correlation between charge carrier density andmobility fluctuations in graphene”
J. M. Lu, J. Pan, S. S. Yeh, H. J. Zhang, Y. Zheng, Q. H. Chen, Z. Wang, B. Zhang, J. J. Lin and P. Sheng
Physical Review B, 90, 085434 (2014) https://doi.org/10.1103/PhysRevB.90.085434
15. “Large-scale Mesoscopic Transport in Nanostructured Graphene”
Z.J. Zhang, J. M. Lu, W. Shi, Z. Wang, T. Zhang, M. Y. Sun, Y. Zheng, Q. H. Chen, N. Wang, J. J. Lin, P. Sheng
Physical Review Letters, 110, 066805 (2013) https://doi.org/10.1103/PhysRevLett.110.066805
14. “Superconductivity in Bundles of Double-Wall Carbon Nanotubes”
W. Shi^#, Z. Wang^#, Q. C. Zhang, C. Ieong, M. Q. He, R. Lortz, Y. Zheng, Y. Cai, N. Wang, T. Zhang, H. J. Zhang, Z. K. Tang, P. Sheng,
H. Muramatsu, Y. A. Kim, M. Endo, P. T. Araujo and M. S. Dresselhaus
Scientific Reports 2, 625 (2012) https://doi.org/10.1038/srep00625
13. “Superconductivity in 4-Angstrom carbon nanotubes-A short review”
Z. Wang, W. Shi, R. Lortz and P. Sheng
Nanoscale, 4, 21 (2012) https://doi.org/10.1039/C1NR10817D
12. “Dimensional crossover transition in a system of weakly coupled superconducting nanowires”
M. Y. Sun, Z. L. Hou, T. Zhang, Z. Wang, W. Shi, R. Lortz and P. Sheng
New Journal of Physics 14, 103018 (2012) https://doi.org/10.1088/1367-2630/14/10/103018
11. “Observation of the Meissner state in superconducting arrays of 4-Angstrom carbon nanotubes”
C. Ieong, Z. Wang, W. Shi, Y.X. Wang, N. Wang, Z. K. Tang, P. Sheng, R. Lortz
Physcial Review B, 83, 184512 (2011) https://doi.org/10.1103/PhysRevB.83.184512
10. “Crossover from Peierls distortion to one-dimensional superconductivity crossover in thin arrays of (5,0) carbon nanotubes”
T. Zhang, M. Y. Sun, Z. Wang, W. Shi, P. Sheng
Physical Review B, 84, 245449 (2011) https://doi.org/10.1103/PhysRevB.84.245449
9. “Graphene magnetoresistance device in van der Pauw geometry”
J. M. Lu, H. J. Zhang, W. Shi, Z. Wang, Y. Zheng, T. Zhang, N. Wang, Z. K. Tang, P. Sheng
Nano Letters, 11, 2973 (2011) https://doi.org/10.1021/nl201538m
8. “Superconducting transitions of intrinsic arrays of weakly coupled one-dimensional superconducting chains: the case
oftheextremequasi-1D superconductor Ti₂Mo₆Se₆”
B. Bergk, A.P. Petrovic, Z. Wang, Y. Wang, D. Salloum, P. Gougeon, M. Potel, R. Lortz
New Journal of Physics, 13, 103018 (2011) https://doi.org/10.1088/1367-2630/13/10/103018
7. “Scaling of the anomalous Hall current in Fe_100-x(SiO₂)_x films”
W. J. Xu, B. Zhang, Q. X. Wang, W. B. Mi, Z. Wang, W. Li, X. X. Zhang
Physical Review B, 83, 205311 (2011) 10.1103/PhysRevB.83.205311
6. “1D goes 2D: A Berezinskii-Kosterlitz-Thouless transition in superconducting arrays of 4-Angstrom carbon nanotubes”
Z. Wang, W. Shi, H. Xie, T. Zhang, N. Wang, Z. K. Tang, X. X. Zhang, R. Lortz, P. Sheng
Physica Status Solidi B – Basic Solid State Physics, 247, 2968-2973 (2010) https://doi.org/10.1002/pssb.
5. “Superconducting resistive transition in coupled arrays of 4 Angstrom carbon nanotubes”
Z. Wang, W. Shi, H. Xie, T. Zhang, N. Wang, Z. K. Tang, X. X. Zhang, R. Lortz, P. Sheng, I. Sheikin, A. Demuer
Physical Review B, 81, 174530 (2010) https://doi.org/10. 1103/PhysRevB.81.174530
4. “Anomalous Hall effect in Fe/Gd bilayers”
W. J. Xu, B. Zhang, Z. X. Liu, Z. Wang, W. Li, Z. B. Wu, R. H. Yu, X. X. Zhang
EPL, 90, 27004 (2010) https://doi.org/10.1209/0295-5075/90/27004
3. “The van der Waals epitaxy of Bi₂Se₃ on the vicinal Si(111) surface: an approach for preparing high-quality thin films of a
topological insulator”
H. D. Li, Z. Y. Wang, X. Kan, X. Guo, H. T. He, Z. Wang, J. N. Wang, T. L. Wong, N. Wang, M. H. Xie
New Journal of Physics, 12, 103038 (2010) https://doi.org/10.1088/1367-2630/12/10/103038
2. “Superconducting characteristics of 4-Angstrom carbon nanotube-zeolite composite”
R. Lortz, Q. C. Zhang, W. Shi, J. T. Ye, C. Y. Qiu, Z. Wang, H. T. He, P. Sheng, T. Z. Qian, Z. K. Tang, N. Wang, X. X. Zhang,
J. N. Wang, C. T. Chan
Proceedings of the National Academy of Sciences of the United States of America, 106, 7299-7303 (2009)
https://doi.org/10.1073/pnas.
1. “Scaling law of anomalous Hall effect in Fe/Cu bilayers”
W. J. Xu, B. Zhang, Z. Wang, S.S. Chu, W. Li, X. X. Zhang
European Physical Journal B, 65, 233-237 (2008) https://doi.org/10.1140/epjb/e2008-00350-3

People - 王喆Principal Investigator

Zhe Wang 王喆
Professor 教授，博导
国家“高层次人才”青年项目入选者
陕西省“高层次人才”青年项目入选者
西安交通大学 "青年拔尖人才"项目入选者
西安交通大学 "思源****"

Graduate Students

Jiakai Sun Jiani Hu Lihao Zhang
孙佳凯呼加妮张利昊

Research Assistant

Xiaoyu Wang Hao Feng Jiazhuo Li
王啸宇冯昊李佳卓

Dr. Zhe Wang - 王喆Basic Information (基本信息)

Zhe Wang 王喆
Professor 教授，博导
国家“高层次人才”青年项目入选者
陕西省“高层次人才”青年项目入选者
西安交通大学 "青年拔尖人才"项目入选者
西安交通大学 "思源****"

Contact (联系方式)
Email: zhe.wang [at] xjtu.edu.cn
Address: Room B702, School of Science,
Xi'an Jiaotong University,
Xi'an, Shanxi Province,
P.R. China 710049
西安交通大学兴庆校区
材料与基础学科大楼（仲英楼）B702室
中国西部科技创新港泓理楼5117室

Professional Experience (工作经历)
2019/10 - present Xi'an Jiaotong University, Professor
2019/01 - 2019/09 University of Geneva, Senior Research and Teaching Assitant
2014/03 - 2018/12 University of Geneva, Postdoc in Group of Alberto Morpurgo
2011/12 - 2014/02 The Hong Kong University of Science and Technology, Posdoc in Group of Ping Sheng

Education (教育经历)

2006/09 - 2011/11 The Hong Kong University of Science and Technology (香港科技大学)
Ph.D. in Physics, Advisor: Ping Sheng
2002/09 - 2006/07 Wuhan University (武汉大学) B.S. in Physics

Research Interest (研究领域)
Low-dimensional quantum materials and devices(低维量子材料与器件)：
Quantum transport properties of low-dimensional electronic system (graphene, CNTs...)
（低维系统中的量子输运特性）
2D Magnetism （二维磁性）
Superconductivity （超导）
Spintronic devices with 2D materials （自旋电子器件）
van der Waals heterostructures （二维材料及异质结）

Openings - 王喆Openings 招聘信息
We are currently recruiting graduate students, postdocs and junior reserachers with background in Physics and Materials Science. Please Contact Prof. Wang: zhe.wang@xjtu.edu.cn
课题组招聘硕士、博士研究生，欢迎物理及材料专业背景的同学推免或者报考，也欢迎广大本科生同学来课题组交流学习！
本课题组长期招聘博士后，研究方向为低维度系统的量子输运特性，二维材料器件制备与测量、自旋电子器件。年薪大于18万，优先推荐学校与国家博士后人才计划，提供公寓住房，子女可享受交大优质中小幼教育资源，工作优秀出站时可应聘学校副研究员或副教授岗位。
联系方式: zhe.wang [at] xjtu.edu.cn