WELCOME TO

               WANG GROUP

Ultrafast spectroscopy and scanning microscopy of quantum matter

Group News

2017/07

We are about to move into the new physics building in Jiangwan campus…

We use superconducting quantum interference devices and ultrafast laser to study quantum materials, including topological insulators and unconventional superconductors, whose edge, surface, interface characteristics and 2D limit are mainly focused.

 

Topological insulator is a semiconductor with a protected surface state. The surface state is point spin polarization, which facilitates the powerless transmission of information based on electron spin, which may be used in Spintronics. Theoretically, Majorana fermions may exist when topological insulators and superconductors are combined. This novel particle can play the role of a quantum bit in topological quantum calculation. Thus, finding Majorana fermions will be one of the main directions in our recent exploration. The scanning superconducting quantum interferometer (SQUID) is the most important concept of superconducting integrated circuits.Mastering its design and preparation will make it possible to manufacture the complex superconducting integrated circuits. These technologies with high frequencies (greater than 100 GHz) and low energy consumption will innovate existing transistor-based semiconductor integrated circuits, and they are also a promising way to achieve quantum computing.

 

 

 

Research

Techniques

Group photo 2017

Yihua Wang

王熠华

Professor

 

wangyhv@fudan.edu.cn

 

 

 

Shaoyu Yin

尹少禹

Visiting Scholar

 

yyin@fudan.edu.cn

 

 

 

Yinping Pan

潘银萍

Ph.D candidate

 

15110190034@fudan.edu.cn

Research:

   Nanobridge-based Scanning SQUID           Microscopy’s design and fabrication

Hao Ru

茹  浩

Ph.D candidate

 

hru16@fudan.edu.cn

 

 

 

Yimin Wan

万一民

Ph.D candidate

 

16110190031@fudan.edu.cn

 

 

 

Shiyuan Wang

王世源

Ph.D candidate

 

wangshiyuan1506@gmail.com

 

 

 

 

Yishi Lin

林一石

Ph.D candidate

 

yslin0110@qq.com

 

 

 

 Lijie Wang

王丽杰

Ph.D candidate

 

53175812@qq.com

 

 

 

Haoran Zhang

张浩然

Undergraduate

 

haoran.zhang2@duke.edu

 

 

 

Yuan Meng

蒙  媛

Research Assistant

 

18016323525@163.com

 

 

 

Members

Publication

1.  Z. C. Zhang * , Y. H. Wang * , Q. Song, C. Liu, R. Peng, K. A. Moler, D. L. Feng, Y. Wang, “Onset of the Meissner effect at 65K in FeSe thin film grown on Nb-doped SrTiO3 substrate”, Science Bulletin 60 (14), 1301-1304 (2015)

 

2.  M. Xia, J. Jiang, Z. R. Ye, Y. H. Wang, Y. Zhang, S. D. Chen, X. H. Niu, D. F. Xu, F. Chen, X. H. Chen, B. P. Xie, T. Zhang, D. L. Feng, “Angle-resolved Photoemission Spectroscopy Study on the Surface States of the Correlated Topological Insulator YbB6”, Scientific Reports 4, 5999 (2014)

 

3.  Y. H. Wang, H. Steinberg, P. Jarillo-Herrero, N. Gedik, “Observation of Floquet-Bloch states on the surface of a topological insulator”,Science 342, 453 (2013) (featured in MIT news)

 

4.  B. M. Fregoso, Y. H. Wang, N. Gedik, and V. Galitski, “Driven electronic states at the surface of a topological insulator”, Phys. Rev. B 88, 155129 (2013)

 

5.  Yihua Wang, and Nuh Gedik, “Circular dichroism in angle-resolved photoemission spectroscopy of topological insulators”, Phys. Status Solidi RRL 7, 64 (2013) (invited review)

 

6.  Y. H. Wang, D. Hsieh, E. J. Sie, H. Steinberg, D. R. Gardner, Y. S. Lee, P. Jarillo-Herrero, and N. Gedik, “Measurement of intrinsic Dirac fermion cooling on the surface of a topological insulator Bi2Se3 using time- and angle-resolved photoemission spectroscopy”, Phys. Rev. Lett. 109, 127401 (2012) (featured in Physics Synopsis, MIT news and NBC news)

 

7.  Y. H. Wang, and N. Gedik, “Electron pulse compression with a practical reflectron design for ultrafast electron diffraction”, IEEE Journal of Selected Topics in Quantum Electronics 18, 140 (2012)

 

8.  Y. H. Wang, D. Hsieh, D. Pilon, L. Fu, D. R. Gardner, Y. S. Lee and N. Gedik, “Observation of a warped helical spin texture in Bi2Se3 from circular dichroism angle-resolved photoemission spectroscopy”, Phys. Rev. Lett. 107, 207602 (2011) (featured in MIT news)

 

9.  S. E. Maxwell, M. T. Hummon, Y. H. Wang, A. A. Buchachenko, R. V. Krems, and J. M. Doyle, “Spin-orbit interaction and large inelastic rates in bismuth-helium collisions”, Phys. Rev. A 78, 042706 (2008)

 

10.  M.T. Hummon, W.C. Campbell, H. Lu, E. Tsikata, Y. H. Wang, and J.M. Doyle, “Magnetic trapping of atomic nitrogen and cotrapping of NH”, Phys. Rev. A 78, 050702(R) (2008)

 

11.  K. Yang, B. P. Xie, D. W. Shen, J. F. Zhao, H. W. Ou, J. Wei, S. Wang, Y. H. Wang, D.H. Lu, R. H. He, M. Arita, A. Ino, H. Namatame, M. Taniguchi, F. Q. Xu, H. Eisaki, N. Kaneko, D. L. Feng, “Electronic structure in the heavily overdoped regime of Bi2Sr2CuO6+d cuprate superconductors”, Phys. Rev. B 73, 144507 (2006)

 

 

 

If you are interested in the exciting field of quantum matter, please contact Prof. Wang: wangyhv@fudan.edu.cn

 

Undergraduates and postgraduates are all welcomed!

 

 

 

 

Contact Us :

 

Prof. YiHua Wang

 

Tel: 021-51630254

 

Email: wangyhv@fudan.edu.cn

 

Office: 先进材料实验室407

 

Address:上海市杨浦区淞沪路2205号先进材料实验室

 

 

Opening

Copyright©Yi Hua Wang 2017, All rights reserved.