Education and Research Experience: 

Professor & Leader of Electron Ultramicroscopy Group, Xiamen University & Tan Kah Kee Innovation Laboratory (Jan. 2023 - Now)

Green IT Group Leader/Scientific Staff, Ernst Ruska-Centre, Forschungszentrum Juelich, Germany (Jun. 2019 – Dec. 2022)

Scientific Staff/Postdoc, Ernst Ruska-Centre, Forschungszentrum Juelich, Germany (Jun. 2016 – May 2019)

Collaboration Scientist/Postdoc, Swiss Federal Institute of Technology Lausanne (EPFL), Switzerland (Sep. 2011 – May 2016)

Doctor of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, China (Sep. 2008 – Jul. 2011)

Master of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, China (Sep. 2006 – Jul. 2008)

Bachelor of Physics, Jilin University, China (Sep. 2002 – Jul. 2006)

Principal Research Interests:

High-contrast light element imaging, Temporal and atomic resolution, Cryogenic S/TEM, Functional ceramics, Energy catalysis, Quantum materials

Selected Recent Publications:

1. X.-K. Wei*, N. Domingo, Y. Sun, N. Balke, R.E. Dunin-Borkowski, J. Mayer, “Progress on emerging ferroelectric materials for energy harvesting, storage and conversion”, Adv. Energy Mater. 12, 2201199 (2022).

2. M. Bai^#, X.-K. Wei^#, J. Feng^#, M. Luysberg, A. Bliesener, G. Lippertz, A. Uday, A.A. Taskin, J. Mayer, Y. Ando*, “Proximity-induced superconductivity in (Bi_1-xSb_x)₂Te₃ topological-insulator nanowires”, Commun. Mater. 3, 1-7 (2022)

3. X.-K. Wei*, S. Prokhorenko, B.-X. Wang, Z. Liu, Y.-J. Xie, Y. Nahas, C.-L. Jia, R.E. Dunin-Borkowski, J. Mayer, L. Bellaiche*, Z.-G. Ye*, “Ferroelectric phase-transition frustration near a tricritical composition point”, Nat. Commun. 12, 5322 (2021).

4. X.-K. Wei*, C. L. Jia, K. Roleder, R. E. Dunin-Borkowski, J. Mayer, “In-situ observation of point-defect-induced unit-cell-wise energy-storage pathway in PbZrO₃”, Adv. Funct. Mater. 31, 2008609 (2021).

5. X.-K. Wei*, G. Bihlmayer, X. Zhou, W. Feng, Y. V. Kolen'ko, D. Xiong, L. Liu, S. Blugel, R. E. Dunin-Borkowski, “Discovery of real-space topological ferroelectricity in metallic transition-metal phosphides”, Adv. Mater. 32, 2003479 (2020).

6. X.-K. Wei*, C. L. Jia, H. C. Du, K. Roleder, J. Mayer, R. E. Dunin-Borkowski, “An unconventional transient phase with cycloidal order of polarization in energy‐storage antiferroelectric PbZrO₃”, Adv. Mater. 32, 1907208 (2020).

7. T. Lan, C.-L. Tsai, F. Tietz, X.-K. Wei*, M. Heggen, R.E. Dunin-Borkowski, R. Wang, Y. Xiao*, Q. Ma*, O. Guillon, “Room-temperature all-solid-state sodium batteries with robust ceramic interface between rigid electrolyte and electrode materials”, Nano Energy 65, 104040 (2019).

8. X.-K. Wei*, Y. Yang, L. J. McGilly, L. Feigl, R.E. Dunin-Borkowski, C.-L. Jia, L. Bellaiche*, N. Setter, “Flexible polarization rotation at ferroelectric-metal interface as seeds for domain nucleation”, Phys. Rev. B 98, 020102(R) (2018).

9. X.-K. Wei*, T. Sluka, B. Fraygola, L. Feigl, H. Du, L. Jin, C.L. Jia, N. Setter, “Controlled charging of ferroelastic domain walls in oxide ferroelectrics”, ACS Appl. Mater. Interfaces 9, 6539 (2017).

10. X.-K. Wei*, C.-L. Jia, T. Sluka, B.-X. Wang, Z.-G. Ye, N. Setter, “Néel-like domain walls in ferroelectric Pb(Zr,Ti)O₃ single crystals”, Nat. Commun. 7, 12385 (2016).

11. J. Wang*, B.W. Eerd, T. Sluka, C. Sandu, M. Cantoni, X.-K. Wei, A. Kvasov, L.J. McGilly, P. Gemeiner, B. Dkhil, A. Tagantsev, J.Trodahl, N. Setter*, “Negative-pressure induced enhancements in a nanoporous freestanding ferroelectric”, Nat. Mater. 14, 985 (2015).

12. X.-K. Wei, A. K. Tagantsev, A. Kvasov, K. Roleder, C.-L. Jia, N. Setter*, “Ferroelectric translational antiphase boundaries in non-polar materials”, Nat. Commun. 5, 3031 (2014).