Prof. Ziqiang Qiu 邱子强

Chair Professor

Contact Info

Email:qiu@berkeley.edu

 

Education

Degree

Year

Major    

Institution

Ph.D.

1984-1991

Physics

The Johns Hopkins University

B.S.

1980-1984

Physics

Beijing University China

 

Professional Appointments

Year

Position

Institution

1990-1993

Postdoctoral Fellow

MSD, Argonne National Laboratory

1993-2000

Assistant Professor

Physics Department, UC-Berkeley

2000-2005

Associate Professor

Physics Department, UC-Berkeley

2005-present

Full Professor

Physics Department, UC-Berkeley

 

Research Interests

Experimental study of MBE grown magnetic ultrathin films using Magneto-Optic effect and x-rays.

 

Honors and Awards

1.      Recipient of the 1992 DOE BES/MS Award for Outstanding Scientific Achievement in Solid State Physics.

2.      The 1994 AT&T Award of Special Research Grant for Universities.

3.      The 1997 Young Investigator Award from Oversea Chinese Physics Association (OCPA).

4.      The 1997 Hellman Family Faculty Fund Award.

5.      1999 Outstanding Performance Award of Materials Science Division, Lawrence Berkeley National Lab.

6.      1999 David A. Shirley Award of Advanced Light Source Division, Lawrence Berkeley National Lab.

7.      2001 Outstanding Oversea Chinese Scholar, Chinese Academy of Science.

8.      2009 Yangtze River Scholar, Minister of Education Department, P. R. China

9.      2010 Fellow of American Physical Society

 

Selected Publications

1. J. S. Park, A. Quesada, Y. Meng, J. Li, E. Jin, H. Son, A. Tan, J. Wu, C. Hwang, H. W. Zhao, A. K. Schmid, and Z. Q. Qiu, “Determination of spin-polarized quantum well states and spin-split energy dispersions of Co ultrathin films grown on Mo(110).” Phys. Rev. B 83, 113405 (2011).

2. J. Wu, D. Carlton, J. S. Park, Y. Meng, E. Arenholz, A. Doran, A.T. Young, A. Scholl, C. Hwang, H. W. Zhao, J. Bokor, and Z. Q. Qiu, “Direct observation of imprinted antiferromagnetic vortex state in CoO/Fe/Ag(001) disks.” Nature Physics 7, 303-306 (2011).

3. Y. Meng, J. Li, A. Tan, E. Jin, J. Son, J. S. Park, A. Doran, A.T. Young, A. Scholl, E. Arenholz, J. Wu, C. Hwang, H. W. Zhao, and Z. Q. Qiu, “Element-specific study of epitaxial NiO/Ag/CoO/Fe films grown on vicinal Ag(001) using Photoemission Electron Microscopy.” Appl. Phys. Lett. 98, 212508 (2011).

4. J. Wu, A. Scholl, E. Arenholz, Chanyong Hwang, and Z. Q. Qiu, “Construction of the magnetic phase diagram of FeMn/Ni/Cu(001) using Photoemission Electron Microscopy.” IEEE Transactions on Magnetics 7, 1631 (2011).

5. J. Li, E. Arenholz,Y. Meng, A. Tan,J. Park, E. Jin, H. Son, J. Wu, C.A. Jenkins,A. Scholl, H. W. Zhao, Chanyong Hwang, and Z. Q. Qiu, “Continuous Spin Reorientation Transition in Epitaxial Antiferromagnetic NiO Thin Films.” Phys. Rev. B 84, 012406 (2011).

6. Y. Meng,J. Li,A. Tan, J. Park,E. Jin, H. Son, A. Doran, A. Scholl, E. Arenholz,H. W. Zhao, Chanyong Hwang, and Z. Q. Qiu, “A study of FeMn/Fe/Co/Cu(1,1,10) films using MOKE and XMCD.” Phys. Rev. B 84, 064416 (2011).

7. J. Li, Y. Meng, J. S. Park, C.A. Jenkins, E. Arenholz, A. Scholl, A. Tan, H. Son, H. W. Zhao, Chanyong Hwang, Y. Z. Wu, and Z. Q. Qiu, “Determination of the Fe magnetic anisotropies and the CoO frozen spins in epitaxial CoO/Fe/Ag(001).” Phys. Rev. B84, 094447 (2011).

8. S. S. Hong, H. Y. Kwona, K. M. Bu, Y. Z. Wu, Z. Q. Qiu, C. Won, “A study of the effective magnetic anisotropy and the corresponding spin configurations in two dimensional ferromagnetic/antiferromagnetic system.” J. of Mag. Magn. Mat.323, 3294 (2011).

9. Y. Meng, J. Li, P.-A. Glans, C. A. Jenkins, E. Arenholz, A. Tan, J. Gibbons, J. S. Park, Chanyong Hwang, H. W. Zhao, and Z. Q. Qiu, “Magnetic interlayer coupling between antiferromagnetic CoO and ferromagnetic Fe across a Ag spacer layer in epitaxially grown CoO/Ag/Fe/Ag(001).” Phys. Rev. B85, 014425 (2012).

10. L. Y. Ma, G. Chen, J. Li, J. Zhu, Z. Q. Qiu, and Y. Z. Wu, “NiO-thickness dependent magnetic anisotropies in Fe/NiO/Au(001) and Fe/NiO/MgO(001) systems.”  J. of Mag. Magn. Mat.324, 528 (2012).

11. J. Li, E. Jin, H. Son, A. Tan, W. N. Cao, Chanyong Hwang, and Z. Q. Qiu, 'Design of a vector magnet for the measurements of anisotropic magnetoresistance and rotational magneto-optic Kerr effect.' Review of Scientific Instruments 83, 033906 (2012).

12. Y. Z. Wu, B. Sinkovic, C. Won, J. Zhu, Y. Zhao, and Z. Q. Qiu, “Experimental study of the x-ray linear dichroism of NiO films grown on Fe(001).” Phys. Rev. B85, 134436 (2012).

13. J. Li, Z. Y. Wang, A. Tan, P.-A. Glans, E. Arenholz, C. Hwang, J. Shi, and Z. Q. Qiu, “Magnetic dead layer at the interface between a Co film and the topological insulator Bi2Se3”, Phys. Rev. B 86, 054430 (2012).

14. A. Tan, J. Li, C. A. Jenkins, E. Arenholz, A. Scholl, C. Hwang, and Z. Q. Qiu, “Exchange bias in epitaxially grown CoO/MgO/Fe/Ag(001).” Phys. Rev. B86, 064406 (2012).

15. G. Chen, J. Zhu, A. Quesada, J. Li, A. T. N’Diaye, Y. Huo, T. P. Ma, Y. Chen, H.Y. Kwon, C. Won, Z. Q. Qiu, A. K. Schmid, and Y. Z. Wu, “Novel chiral magnetic domain wall structure in Fe/Ni/Cu(001) films.” Phys. Rev. Lett. 110, 177204 (2013).

16. L. Andrew Wray, J. Li, Z. Q. Qiu, Jinsheng Wen, Zhijun Xu, Genda Gu, Shih-Wen Huang, Elke Arenholz, Wanli Yang, Zahid Hussain, and Yi-De Chuang, “Measurement of the spectral line shapes for orbital excitations in the Mott insulator CoO using high-resolution resonant inelastic x-ray scattering.” Phys. Rev. B88, 035105 (2013).

17. A. Tan, J. Li, C. A. Jenkins, E. Arenholz, A. Scholl, C. Hwang, and Z. Q. Qiu, “Magnetic anisotropy in epitaxial Py/FeMn/Cu(001) and Py/FeMn/Ni/Cu(001) films.” Phys. Rev. B88, 104404 (2013).

18. Kyoung-Woong Moon, Byong Sun Chun, Wondong Kim, Z. Q. Qiu, and Chanyong Hwang, “Control of skyrmion magnetic bubble gyration.” Phys. Rev. B89, 064413 (2014).

19. J. Li, A. Tan, K. W. Moon, A. Doran, M. A. Marcus, A. T. Young, E. Arenholz, S. Ma, R. F. Yang, C. Hwang, and Z. Q. Qiu, “Imprinting antivortex states from ferromagnetic Fe into antiferromagnetic NiO in epitaxial NiO/Fe/Ag(001) microstructures.”  Appl. Phys. Lett.104, 112407 (2014).

20. J. Li, A. Tan, K. W. Moon, A. Doran, M. A. Marcus, A. T. Young, E. Arenholz, S. Ma, R. F. Yang, C. Hwang, and Z. Q. Qiu, “Stabilizing a magnetic vortex/antivortex array in single crystalline Fe/Ag(001) microstructures.”  Appl. Phys. Lett.104, 262409 (2014).

21. J. Li, A. Tan, K. W. Moon, A. Doran, M. A. Marcus, A. T. Young, E. Arenholz, S. Ma, R. F. Yang, C. Hwang, and Z. Q. Qiu, “Tailoring the topology of an artificial magnetic skyrmion.” Nature Communications 5, 4704 (2014).

ALS Highlight: http://www-als.lbl.gov/index.php/science-highlights/science-highlights/957-skyrmion-behavior-revealed-by-two-x-ray-studies.html

22. Kyoung-Woong Moon, Byong Sun Chun, Wondong Kim, Z. Q. Qiu, and Chanyong Hwang, “Duffing oscillation-induced reversal of magnetic vortex core by a resonant perpendicular magnetic field.” Science Reports 4, 6170 (2014).

23. J. Li, A. Tan, S. Ma, R. F. Yang, E. Arenholz, C. Hwang, and Z. Q. Qiu, “Chirality switching and winding/unwinding of the antiferromagnetic NiO domain walls in Fe/NiO/Fe/CoO/Ag(001).” Phys. Rev. Lett. 113, 147207 (2014).

ALS Science Brief: http://www-als.lbl.gov/index.php/science-highlights/science-briefs/989-antiferromagnetic-spins-do-the-twist.html

24. Gong Chen, Alpha T. N’Diaye, Sang Pyo Kang, Hee Young Kwon, Changyeon Won, Yizheng Wu, Z. Q. Qiu, and Andreas K. Schmid, “Unlocking Bloch-type chirality in ultrathin magnets through uniaxial strain.” Nature Communications 6, 6598 (2015).

25. Q. Li, G. Chen, T. P. Ma, J. Zhu, Alpha N’Diaye, L. Sun, T. Gu, Y. Huo, J. H. Liang, R. W. Li, C. Won, H. F. Ding, Z. Q. Qiu and Y. Z. Wu, “Activation of antiferromagnetic domain switching in exchange coupled Fe/CoO/MgO(001) system.” Phys. Rev. B 91, 134428 (2015).

26. L. Andrew Wray, Shih-Wen Huang, Ignace Jarrige, Kazuhiko Ikeuchi, Kenji Ishii, Jia Li, Z. Q. Qiu, Zahid Hussain, Yi-De Chuang,“Extending resonant inelastic X-ray scattering to the extreme ultraviolet.” Front. Phys3:32. doi: 10.3389/fphy.2015.00032.

27. S. Ma, A. Tan, J. X. Deng, J. Li, Z. D. Zhang, C. Hwang, and Z. Q. Qiu, “Tailoring the magnetic anisotropy of Py/Ni bilayer films using well aligned atomic steps on Cu(001).” Science Reports 5, 11055 (2015).