时间：2025年7月1日（周二）14:00-17:00

地点：李薰楼468室

Emergent Quantum Phenomena in Diamond and Other Materials

Gufei Zhang

Harbin Institute of Technology (HIT) and the Zhengzhou Research Institute of HIT

As a wide-bandgap semiconductor with some of the most extreme physical properties of any material, diamond has drawn wide attention for its potential applications in power electronics, optoelectronics, and electromechanics.¹ Apart from its potential in upgrading traditional semiconductor industry, diamond also bears great promise for the development of quantum information technologies by being the host of a variety of quantum phenomena, e.g., spin states of color centers in diamond, and superconductivity in boron-doped diamond.² In this talk, I will provide an overview of the quantum phenomena in superconducting diamond and devices. I will demonstrate how the nanogranular structure of this quantum material leads to the emergence of various quantum confinement and coherence effects.^3-9 I will present our new findings of an unconventional giant ‘magnetoresistance’ in nanoscale ‘diamond rings’ which could be used as artificial atoms to advance the design of superconducting quantum devices.¹⁰ Moreover, I will show our findings of a series of exotic magnetoelectronic phenomena in ferromagnetic superconducting diamond, which expand the application scope of diamond from electronics to spintronics.^11,12 In addition, the audience will be briefed on our investigations of phase-lip events in one-dimensional superconducting nanowires made of aluminum and iron pnictide, respectively.^13,14

1. P. May,Philos. Trans. R. Soc. A 358 (2000),473.

2. E. Ekimov,et al. Nature 428 (2004),542.

3. G. Zhang,et al. Phys. Rev. B 84 (2011),214517.

4. G. Zhang,et al. Phys. Rev. Lett. 110 (2013),077001.

5. G. Zhang,et al. Adv. Mater. 26 (2014),2034.

6. G. Zhang,et al. Phys. Rev. Appl. 6 (2016),064011.

7. G. Zhang,et al. ACS Nano 11 (2017),11746.

8. G. Zhang,et al. Phys. Rev. Appl. 12 (2019),064042.

9. G. Zhang,et al. Phys. Rev. Mater. 3 (2019),034801.

10.  G. Zhang,et al. Adv. Mater. (2023),2211129.

11.  G. Zhang,et al. ACS Nano 11 (2017),5358.

12.  G. Zhang,et al. Sci. Adv. 6 (2020),eaaz2536.

13.  J. Li,et al. Nat. Commun. 6 (2015),7614.

14.  X. Baumans,et al. Nat. Commun. 7 (2016),10560.

Dr. Gufei Zhang is currently a professor and a researcher affiliated with the Harbin Institute of Technology (HIT) and the Zhengzhou Research Institute of HIT,respectively. At the invitation of Functional Diamond and Frontiers in Electronic Materials,he serves as a member of the editorial board of these two journals. He is also a member of the international expert panel of the Slovak Agency of Research and Development.

After obtaining his BSc in Applied Physics from the University of Science and Technology of China, Gufei Zhang joined the Institute for Nanoscale Physics and Chemistry at KU Leuven in Belgium, where he earned his PhD in Physics. In 2014, in recognition of his achievements in quantum diamond, Dr. Zhang was selected as an FWO Fellow by the Flemish Government of Belgium. In 2017, he was awarded the Seal of Excellence by the Marie Skłodowska-Curie Action of the European Commission. In 2018, he was appointed as a Fellow of Engineering and an assistant professor by the Danish Institute for Advanced Study and the University of Southern Denmark, respectively. In 2023, Dr. Zhang was selected as a “Zhongyuan Talent” by the Government of Henan Province of China. In 2025, he was conferred an Excellent Author Award by WILEY and an IMPULZ Fellowship by the Slovak Academy of Sciences.