Kejin Zhou

The emergent phenomena (i.e., new states of matter) is the hallmark of strongly interacting quantum materials. These can span from metal-insulator transition, magnetism, superconductivity to collective spin-, charge-, orbital- order and new phases emerged from their competition. For addressing the many-body problems, it is crucial to experimentally and theoretically characterize its interplay with microscopic pieces such as spin-orbit coupling, the electron-electron correlation, the superexchange, and electron-phonon coupling, etc. One of the key experimental techniques is Resonant Inelastic X-ray Scattering (RIXS) which is very sensitive to spin-, charge-, orbital-, and lattice- degrees of freedom. Due to the vast improvement of its energy resolution, RIXS has been shown as a promising technique for resolving charge, orbital, and spin excitations in many 3d, 4d, and 5dtransition metal oxides and form an important chapter in the research of the emergent phenomena of correlated quantum materials. 

Current area of focus using RIXS
- Collective spin-, charge-, and orbital- excitations in quantum materials with intertwined charge or orbital order

- Heisenberg magnetism and excitonic magnetism

- Spin, orbital physics and spin-orbit coupling in model systems

Ke-Jin Zhou is the Principal Beamline Scientist of the I21 Resonant Inelastic soft X-ray Scattering (RIXS) beamline in Diamond Light Source which is the only national synchrotron X-ray photon light source facility in the United Kingdom. Besides the post in Diamond, he is currently supervising two PhD students jointly funded by Diamond and partner Universities. 

 

Ke-Jin Zhou obtained his PhD degree from the Institute of High Energy Physics (IHEP), Chinese Academy of Sciences in 2007. During his PhD, he started exploring the application of RIXS on to strongly correlated electronic systems in Beijing Synchrotron Radiation Facility based in IHEP. Importantly, his PhD thesis was the first realisation of RIXS technique in Chinese synchrotron facilities. 

 

From October 2007 to October 2008, Dr. Zhou carried out his postdoctoral research in Laboratoire de Chimie Physique-Matière et Rayonnement, University Pierre and Marie Curie, France, with a project titled as Electronic structure investigation of diluted magnetic semiconductors by using RIXS. 

 

From October 2008 to April 2012, Dr. Zhou was a research fellow at Swiss Light Source, Paul Scherrer Institut, Switzerland. His scientific focus is at the core of strongly correlated electronic systems including unconventional high Tc superconductors (copper oxides and iron-based superconductors), artificial oxide heterostructures, as well as low-dimensional quantum materials using high energy resolution RIXS. Dr. Zhou’s research work was highly recognized by the community and resulted in a few high-level publications (one paper in Nature, one paper in Nature Materials, one paper in Nature Physics, three papers in Nature Communications, one paper in Angewandte Chemie, and eight papers in Phys. Rev. Lett.).

 

In 2012, Dr. Ke-Jin Zhou took upon the post of Principal Beamline Scientist at Diamond Light Source, UK, for leading the Beamline project of the ultra-high energy resolution RIXS. His role is to lead the design, the construction and the delivery of the ultra-high energy resolution RIXS facility in Diamond, followed by the establishment of an in-house research group. The Beamline project was launched in April 2012 and the construction was completed by summer 2017. Since September 2017 the RIXS beamline (I21-RIXS) received more than 30 groups of users very successfully for being as the world leading RIXS facilities.   

 

His scientific focus is the emergent phenomena of the strongly interacting quantum materials which include the metal-insulator transition, magnetism, superconductivity, collective spin-, charge-, orbital- order and new phases emerged from their interactions. He is particularly interested in experimentally characterizing the interplay of the quantum phenomena with microscopic pieces such as spin-orbit coupling, the electron-electron correlation, the superexchange, and electron-phonon coupling, etc, using ultra-high energy resolution Resonant Inelastic X-ray Scattering technique. 

 

 

39. J. Schlappa, U. Kumar, K. J. Zhou, S. Singh, M. Mourigal, V. N. Strocov, A. Revcolevschi, L. Patthey, H. M. Ronnow, S. Johnston, and T. Schmitt

Direct observation of multi-spinon excitations, outside of the two-spinon continuum in the antiferromagnetic spin chain cuprate Sr₂CuO₃

Nature Communications, 9, 5394 (2018) 

 

38. N. C. Plumb, M. Kobayashi, M. Salluzzo, E. Razzoli, C.E. Matt, V. N. Strocov, K. J. Zhou, M. Shi, J. Mesot, T. Schmitt, L. Patthey, and M. Radovic 

Applied Surface Science, 412, 271 (2017) 

 

37. Nikolay A Bogdanov, Valentina Bisogni, Roberto Kraus, Claude Monney, Kejin Zhou, Thorsten Schmitt, Jochen Geck, Alexander O Mitrushchenkov, Hermann Stoll, Jeroen van den Brink and Liviu Hozoi

Journal of Physics: Condensed Matter, 29, 035502 (2017) 

 

36. Steve Johnston, Claude Monney, Valentina Bisogni, Ke-Jin Zhou, Roberto Kraus, Günter Behr, Vladimir N. Strocov, Jiři Málek, Stefan-Ludwig Drechsler, Jochen Geck, Thorsten Schmitt, Jeroen van den Brink

Nature Communication, 7:10563 (2016)

 

35. Y.Y. Peng, M. Hashimoto, M. Moretti Sala, A. Amorese, N.B.Brookes, G. Dellea, W.-S. Lee, M. Minola, T. Schmitt, Y. Yoshida, K.-J. Zhou, H. Eisaki, T.P. Devereaux, Z.-X. Shen, L. Braicovich, G. Ghiringhelli 

Phys. Rev. B 92:064517 (2015)

 

34. Valentina Bisogni, Krzysztof Wohlfeld, Satoshi Nishimoto, Claude Monney, Jan Trinckauf, Kejin Zhou, Roberto Kraus, Klaus Koepernik, Chinnathambi Sekar, Vladimir Strocov, Bernd Büchner, Thorsten Schmitt, Jeroen Van Den Brink, Jochen Geck 

Phys. Rev. Lett. 114(09):096402 (2015)

33. N. C. Plumb, M. Salluzzo, E. Razzoli, M. Månsson, M. Falub, J. Krempasky, C. E. Matt, J. Chang, M. Schulte, J. Braun, H. Ebert, J. Minár, B. Delley, K.-J. Zhou, T. Schmitt, M. Shi, J. Mesot, L. Patthey, M. Radović 

Phys. Rev. Lett. 113(8):086801, (2014)

32. Valentina Bisogni, Stefanos Kourtis, Claude Monney, Kejin Zhou, Roberto Kraus, Chinnathambi Sekar, Vladimir Strocov, Bernd Büchner, Jeroen van den Brink, Lucio Braicovich, Thorsten Schmitt, Maria Daghofer, Jochen Geck 

Phys. Rev. Lett. 112(14):147401, (2014)

 

31. Thorsten Schmitt, Vladimir N. Strocov, Kejin Zhou, Justine Schlappa, Claude Monney, Uwe Flechsig and Luc Patthey

High-resolution resonant inelastic x-ray scattering with soft x-rays at the adress beamline of the swiss light source: Instrumental developments and scientific highlights 
Journal of Electron Spectroscopy and Related Phenomena.188, (2013)

 

30. J. J. Lee, B. Moritz, W. S. Lee, M. Yi, C. J. Jia, A. P. Sorini, K. Kudo, Y. Koike, K. J. Zhou, C. Monney, V. Strocov, L. Patthey, T. Schmitt, T. P. Devereaux, Z. X. Shen 

Phys. Rev. B,89(4), (2013) 

 

29. V Ilakovac, M Guarise, M Grioni, T Schmitt, K Zhou, L Braicovich, G Ghiringhelli, V N Strocov, H Berger 

Journal of Physics Condensed Matter 11/2013; 25(50):505602

 

28. C. Monney, A. Uldry, K. J. Zhou, A. Krzton-Maziopa, E. Pomjakushina, V. N. Strocov, B. Delley, T. Schmitt 

Phys. Rev. B88(16), (2013)

 

27. W S Lee, S Johnston, B Moritz, J Lee, M Yi, K J Zhou, T Schmitt, L Patthey, V Strocov, K Kudo, Y Koike, J van den Brink, T P Devereaux, Z X Shen

Phys. Rev. Lett.110, 265502 (2013)

 

26. M. P. M. Dean, A. J. A. James, R. S. Springell, X. Liu, C. Monney, K. J. Zhou, R. M. Konik, J. S. Wen, Z. J. Xu, G. D. Gu, V. N. Strocov, T. Schmitt, J. P. Hill

Phys. Rev. Lett.110:147001 (2013) 

 

25.K. J. Zhou, Y. B. Huang, C. Monney, X. Dai, V. N. Strocov, N. L. Wang, Z. G. Chen, Chenglin Zhang, Pengcheng Dai, L. Patthey, J. van den Brink, H. Ding, and T. Schmitt

Nature Communication, 4:1470-1475 (2013) 

24. M.M. van Schooneveld, R.W. Gosselink, T.M. Eggenhuisen, M. Al Samarai, C. Monney, K.J. Zhou, T. Schmitt, F.M.F. de Groot 

Angewandte Chemie International Edition, 52:1334, (2013)

 

23. Claude Monney, Valentina Bisogni, Ke Jin Zhou, Roberto Kraus, Vladimir N. Strocov, Gunter Behr, Jiri Malek, Roman Kuzian, Stefan-Ludwig Drechsler, Steve Johnston, Alexandre Revcolevschi, Bernd Buchner, Henrik M. Ronnow, Jeroen van den Brink, Jochen Geck, Thorsten Schmitt 

Phys. Rev. Lett.110:087403, (2013) 

 

22. M P M Dean, R S Springell, C Monney, K J Zhou, J Pereiro, I Božović, B Dalla Piazza, H M Rønnow, E Morenzoni, J van den Brink, T Schmitt, J P Hill

Nature Material, 11(10), 850 (2012)

 

21. C Monney, K J Zhou, H Cercellier, Z Vydrova, M G Garnier, G Monney, V N Strocov, H Berger, H Beck, T Schmitt, P Aebi 

Phys. Rev. Lett.109(12), 047401 (2012)

 

20. Matti M. van Schooneveld, Reshmi Kurian, Amélie Juhin, Kejin Zhou, Justine Schlappa, V.N. Strocov, Thorsten Schmitt, Frank M. F. de Groot

The Journal of Physical Chemistry C, 116(29),15218 (2012)

 

19. J. Schlappa, K. Wolfield, K. J. Zhou, M. Mourigal, M. W. Haverkort, V. N. Strocov, L. Hozoi, C. Monney, S. Nishimoto, S. Singh, A. Revcolevschi, J.-S. Caux, L. Patthey, H. M. Rønnow, J. van den Brink, and T. Schmitt, Spin-Orbital Separation in the quasi 1D Mott-insulator Sr₂CuO₃

Nature, 485, 82-86 (2012)

 

18. B. Dalla Piazza, M. Mourigal, M. Guarise, H. Berger, K. J. Zhou, T. Schmitt, M. Grioni, and H. M. Ronnow

Phys. Rev. B85, 100508(R) (2012)

 

17. M. Le Tacon, G. Ghiringhelli, J. Chaloupka, M. Moretti Sala, V. Hinkov, M. W. Haverkort, M. Minola, M. Bakr, K. J. Zhou, S. Blanco-Canosa, C. Monney, Y. T. Song, G. L. Sun, C. T. Lin, G. M. De Luca, M. Salluzzo, G. Khaliullin, T. Schmitt, L. Braicovich, and B. Keimer 

Nature Physics, 7, 725 (2011)

 

16. S. Glawion, J. Heidler, M. W. Haverkort, L. C. Duda, T. Schmitt, V. Strocov, C. Monney, K. J. Zhou, A. Ruff, M. Sing, and R. Claessen

Phys. Rev. Lett., 107, 107402 (2011)

 

15. Ke-Jin Zhou, Milan Radovic, Justine Schlappa, Vladimir Strocov, Ruggero Frison, Joel Mesot, Luc Patthey, and Thorsten Schmitt

Phys. Rev. B, 83, 201402(R) (2011)

14.M Moretti Sala, V. Bisogni, C. Aruta, G. Balestrino, H. Berger, N. B. Brookes, G. M. de Luc, D. Di Castro, M. Grioni, M. Guarise, P. G. Medaglia, F. Miletto Granozio, M. Minola, P. Perna, M. Radovic, M. Salluzo, T. Schmitt, K. J. Zhou, L. Braicovich and G. Ghiringhelli

New Journal of Physics, 13, 043026(2011)

 

13.K. J. Zhou, Y. Tezuka, M. Q. Cui, J. Zhao, X. C. Liu, Z. Z. Chen, and Z. Y. Wu 

J. Phys.: Condens. Matter, 21, 495502 (2009)

 

12. Xue-Chao Liu, Er-Wei Shi, Zhi-Zhan Chen, Tao Zhang, Ke-Jin Zhou, Ming-Qi Cui

Appl. Phys. Lett., 92, 042502 (2008)

 

11. Xue-Chao Liu, Er-Wei Shi, Zhi-Zhan Chen, Bo-Yuan Chen, Tao Zhang, Li-Xin Song, Ke-Jin Zhou, Ming-Qi Cui

J. Phys.: Condens. Matter, 20, 025208 (2008)

 

10. Xue-Chao Liu, Er-Wei Shi, Zhi-Zhan Chen, Bo-Yuan Chen, Li-Xin Song, Ke-Jin Zhou, Ming-Qi Cui

Journal of Alloys and Compounds, 463, 435 (2008)

 

9.K. J. Zhou, M. Q. Cui, W. Hua, C. Y. Ma, Y. D. Zhao, Y. Y. Huang, W. He and Z. Y. Wu

Spectrochimica Acta Part A, 71, 516-522 (2008)

 

8. Wei Hua, Kejin Zhou, Yuying Huang, Q. Qian, Wei He, Sixuan Ma, Wangsheng Chu, Tiandou Hu, Ziyu Wu

Spectrochimica Acta Part A, 70, 462-465 (2008)

 

7.ZHOU Kejin, Yasuhisa TEZUKA, CUI Mingqi, MA Chenyan, ZHAO Yidong, WU Ziyu and Akira YAGISHITA

Electronic structure of MnS studied by Resonant Inelastic Soft X-ray Scattering

Acta Physica Sinica, 56(5), 2986-2991 (2007)

 

6. Chenyan Ma, Mingqi Cui, Kejin Zhou, Yidong Zhao, Yulian Tian, Ziyu Wu, Lei Zheng, Jie Zhu, Jia Zhao, Kai Chen, Lijuan Sun

AIP Conference Proceeding, 879, 868(2007)

 

5. Jia Zhao, Mingqi Cui, Yidong Zhao, Yulian Tian, Lei Zheng, Kejin Zhou, Chenyan Ma, Kai Chen, Jie Zhu, Lijuan Sun 

Spectrochimica Acta Part B, 62,1257-1262 (2007)

 

4.K. J. Zhou,M. Q. Cui, W. Hua, Y. D. Zhao and Y. Y. Huang

X-Ray Spectrom., 35, 106-111 (2006)

 

3. ZHENG Lei, CUI Ming-Qi, ZHAO Yi-Dong, ZHU Jie, ZHOU Ke-Jin, CHEN Kai, ZHAO Jia, SUN Li-Juan, MA Chen-Yan, ZHOU Hong-Jun, HUO Tong-Lin

HEP&NP, 29 (4), 430-434 (2005)

 

2. ZHAO Jia, CUI Mingqi, ZHAO Yidong, ZHOU Kejin, ZHENG Lei, ZHU Jie, SUN Lijuan, CHEN Kai, MA Chenyan

Nuclear Techniques, 28 (8), 583-588 (2005)

 

1. ZHAO Jia, CUI Mingqi, ZHAO Yidong, TIAN Yulian, ZHOU Kejin, ZHENG Lei, ZHU Jie, MA Chenyan, CHEN Kai, SUN Lijuan, HAN Yong

HEP&NP,29 (12), 1205-1209 (2005)