Po Zhang (张泼)

Associate research scientist
Email: po-zhang@outlook.com, (alternate: zhangpo@baqis.ac.cn)
Office: 633
Google Scholar, ORCID, GitHub

Biography
Po Zhang received B.S. degrees in physics and mathematics from Nankai University in 2012, and a Ph.D. degree in physics from Peking University in 2017. During PhD, he studied quantum Hall states in two-dimensional electron gas in Prof. Rui-Rui Du's lab. Subsequently, he joined Prof. Sergey Frolov's lab at the University of Pittsburgh as a postdoc. He lived in Pittsburgh until 2022, studying topological states and Andreev bound states in superconductor-semiconductor (super-semi) devices. Thereafter, he joined the semiconductor quantum computing group led by Prof. Hongqi Xu at BAQIS as an associate research scientist.

Research
Po Zhang's recent research interests focus on searching for non-Abelian quasi-particles in super-semi hybrid devices and studying physics in these mesoscopic devices. Non-Abelian quasi-particles like Majorana zero modes hold great promise for realizing physically fault-tolerant qubits. The super-semi system is a nice playground for exploring the wonders of quantum or topological physics (and beyond), thanks to the sophisticated semiconductor growth and nanofabrication techniques available today. Click here for an introduction.
Po is also interested in fractional quantum Hall states (strongly-correlated topological systems) and artificial systems consisting of arrays of gate-defined quantum dots (quantum simulation).

Grants
NSFC grant No. 92365103.

Supervised/co-supervised students
Haitian Su (Peking University), Jinqiao Sun (Nankai University)

Hiring
If you are looking for a PhD program, a long-term internship, or other hiring information, please check out this page. Students with a sense of humor and a zest for life are encouraged to apply, as it helps keep our group members smiling :) :) :). DIY enthusiasts are also welcome, as world-changing techniques are often homemade.

Selected Publications/Preprints
For a full list of my published and preprint works, see Google Scholar or ORCID.
(co-first†, co-corresponding#)

  • Xingjun Wu#, Ji-Yin Wang, Haitian Su, Shili Yan, Dong Pan#, Jianhua Zhao, Po Zhang# and H Q Xu#, "Tunable superconducting diode effect in higher-harmonic InSb nanosheet interferometers", New J. Phys. 27 023031 (2025).
  • Haitian Su, Ji-Yin Wang, Han Gao, Yi Luo, Shili Yan, Xingjun Wu, Guoan Li, Jie Shen, Li Lu, Dong Pan#, Jianhua Zhao, Po Zhang#, and H. Q. Xu#, "Microwave-Assisted Unidirectional Superconductivity in Al-InAs Nanowire-Al Junctions under Magnetic Fields", Phys. Rev. Lett. 133, 087001 (2024).
  • P. Zhang, A. Zarassi, L. Jarjat, V. Van de Sande, M. Pendharkar, J. S. Lee, C. P. Dempsey, A. P. McFadden, S. D. Harrington, J. T. Dong, H. Wu, A. -H. Chen, M. Hocevar, C. J. Palmstrøm, and S. M. Frolov, "Large second-order Josephson effect in planar superconductor-semiconductor junctions", SciPost Phys. 16, 030 (2024).
  • Po Zhang, Hao Wu, Jun Chen, Sabbir A. Khan, Peter Krogstrup, David Pekker, and Sergey M. Frolov, "Signatures of Andreev Blockade in a Double Quantum Dot Coupled to a Superconductor", Phys. Rev. Lett. 128, 046801 (2022).
  • M. Pendharkar†, B. Zhang†, H. Wu†, A. Zarassi†, P. Zhang†, C. P. Dempsey, J. S. Lee, S. D. Harrington, G. Badawy, S. Gazibegovic, R. L. M. Op het Veld, M. Rossi, J. Jung, A.-H. Chen, M. A. Verheijen, M. Hocevar, E. P. A. M. Bakkers, C. J. Palmstrøm, and S. M. Frolov, "Parity-preserving and magnetic field–resilient superconductivity in InSb nanowires with Sn shells", Science 372, 508–511 (2021).
  • Po Zhang, Ruiyuan Liu, Rui-Rui Du, L. N. Pfeiffer, and K. W. West, "Composite fermion states around the two-dimensional hole Landau level filling factor 3/2 in tilted magnetic fields", Phys. Rev. B 95, 155316 (2017).
  • Po Zhang, Jianli Wang, Chi Zhang, Rui-Rui Du, L. N. Pfeiffer, and K. W. West, "Shifted Landau ladders and low field magneto-oscillations in high-mobility GaAs 2D hole systems", Applied Physics Letters 110, 112103 (2017).

  • Xingjun Wu, Haitian Su, Chuanchang Zeng, Ji-Yin Wang, Shili Yan, Dong Pan#, Jianhua Zhao, Po Zhang#, and H. Q. Xu#, "Superconducting switching jump induced missing first Shapiro step in Al-InSb nanosheet Josephson junctions", arXiv preprint arXiv:2403.07370 (2024).
  • P. Zhang, A. Zarassi, M. Pendharkar, J. S. Lee, L. Jarjat, V. Van de Sande, B. Zhang, S. Mudi, H. Wu, S. Tan, C. P. Dempsey, A. P. McFadden, S. D. Harrington, B. Shojaei, J. T. Dong, A. -H. Chen, M. Hocevar, C. J. Palmstrøm, and S. M. Frolov, "Planar Josephson Junctions Templated by Nanowire Shadowing", arXiv preprint arXiv:2211.04130 (2022).
  • P. Zhang, S. Mudi, M. Pendharkar, J. S. Lee, C. P. Dempsey, A. P. McFadden, S. D. Har- rington, J. T. Dong, H. Wu, A. -H. Chen, M. Hocevar, C. J. Palmstrøm, and S. M. Frolov, "Missing odd-order Shapiro steps do not uniquely indicate fractional Josephson effect", arXiv preprint arXiv:2211.08710 (2022).