Kai Liu

Kai Lui

Professor and Robert L. McDevitt, K.S.G., K.C.H.S. and Catherine H. McDevitt, L.C.H.S. Chair in Physics

Office: 544 Reiss Science Building
Lab: 111-117 Regents Hall
Telephone: (202) 687-6135
E-mail: kai.liu@georgetown.edu

Website: Group Page; Curriculum Vitae ResearcherID; Google Scholar

Prof. Kai Liu received his Ph.D. in Physics from the Johns Hopkins University in 1998. He then carried out postdoctoral research at the University of California – San Diego. He joined the University of California – Davis faculty in 2001, where he was promoted to Associate Professor in 2005 and Professor in 2008.  He transitioned to the Georgetown University during 2018-19. Prof. Liu was recipient of an Alfred P. Sloan Research Fellowship (2005) and a UC Davis Chancellor’s Fellowship (2007). He is an elected Fellow of the Institute of Physics (UK, 2011), American Physical Society (2012) and IEEE (2016).  He served as the Program Co-Chair for the 2007 Annual Conference on Magnetism and Magnetic Materials (2007 MMM) and the 2011 International Magnetics Conference (2011 Intermag), and the General Chair for the 2016 MMM. He is serving as Secretary for the International Union of Pure and Applied Physics (IUPAP) Commission on Magnetism (2018-2020). He is also an Associate Editor for APL Materials

Current Research

Prof. Liu’s research focuses on synthesis and experimental investigation of nanostructured materials, particularly in nanomagnetism and spintronics, which have potentially important technological applications in magnetic recording, low dissipation information storage and nanoelectronics. Current research topics include: Topological spin textures such as magnetic skyrmions and chiral domain walls; High magnetic anisotropy materials such as L10 FePt that have potential applications in the emerging heat-assisted magnetic recording media; Magneto-ionic control of metal/oxide interfaces towards energy-efficient nanoelectronics and neuromorphics; Low density metallic foams for hydrogen storage, catalysts, photovoltaics, etc.

Selected Publications

A. Quintana, E. Menéndez, M. O. Liedke, V. Sireus, P. Torruella, S. Estradé, F. Peiró, C. Detavernier, P. Murray, D. A. Gilbert, Kai Liu, E. Pellicer, J. Nogués, and J. Sort, “Voltage-controlled ON-OFF ferromagnetism at room temperature in a single metal oxide film”, ACS Nano, 12, 10291-10300 (2018).

H. X. Yang, G. Chen, A. A. C. Cotta, A. T. N’Diaye, S. A. Nikolaev, E. A. Soares, W. A. A. Macedo, Kai Liu, A. K. Schmid, A. Fert, and M. Chshiev, “Significant Dzyaloshinskii-Moriya Interaction at Graphene-Ferromagnet Interfaces due to Rashba-effect”, Nature Materials, 17, 605-609 (2018).

D. A. Gilbert, E. C. Burks, S. V. Ushakov, P. Abellan, I. Arslan, T. E. Felter, A. Navrotsky, and Kai Liu, “Tunable Low Density Palladium Nanowire Foams”, Chemistry of Materials, 29, 9814–9818 (2017).

W. J. Jiang, G. Chen, Kai Liu, J. D. Zang, S. G. E. te velthuis and A. Hoffmann, “Skyrmions in magnetic multilayers”, Physics Reports, 704, 1-49 (2017).

Q. L. He, L. Pan, A. L. Stern, E. C. Burks, X. Y. Che, G. Yin, J. Wang, B. Lian, Q. Zhou, E. S. Choi, K. Murata, X. F. Kou, T. X. Nie, Q. M. Shao, Y. B. Fan, S. C. Zhang, Kai Liu, J. Xia, and K. L. Wang, “Chiral Majorana fermion modes in a quantum anomalous Hall insulator-superconductor structure”, Science, 357, 294-299 (2017).

G. Chen, S. P. Kang, C. Ophus, A. T. N’Diaye, H. Y. Kwon, R. T. Qiu, C. Y. Won, Kai Liu, Y. Z. Wu, and A. K. Schmid, “Out-of-plane chiral domain wall spin-structures in ultrathin in-plane magnets”, Nature Communications, 8, 15302 (2017).

D. A. Gilbert, A. J. Grutter, E. Arenholz, Kai Liu, B. J. Kirby, J. A. Borchers, B. B. Maranville, “Structural and Magnetic Depth Profiles of Voltage-Controlled Magneto-Ionic Heterostructures Beyond the Interface Limit”, Nature Communications, 7, 12264 (2016).

D. A. Gilbert, J. Olamit, R. K. Dumas, B. J. Kirby, A. J. Grutter, B. B. Maranville, E. Arenholz, J. A. Borchers, and Kai Liu, “Controllable Positive Exchange Bias via Redox-Driven Oxygen Migration”, Nature Communications, 7, 11050 (2016).

D. A. Gilbert, B. B. Maranville, A. L. Balk, B. J. Kirby, P. Fischer, D. T. Pierce, J. Unguris, J. A. Borchers, and Kai Liu, “Realization of Ground State Artificial Skyrmion Lattices at Room Temperature”, Nature Communications, 6, 8462 (2015).

D. A. Gilbert, J. W. Liao, L. W. Wang, J. W. Lau, T. J. Klemmer, J. U. Thiele, C. H. Lai, and Kai Liu, “Probing the A1 to L10 Transformation in FeCuPt Using the First Order Reversal Curve Method”, APL Materials, 2, 086106 (2014).

D. A. Gilbert, G. T. Zimanyi, R. K. Dumas, M. Winklhofer, A. Gomez, N. Eibagi, J. L. Vicent, and Kai Liu, “Quantitative Decoding of Interactions in Tunable Nanomagnet Arrays Using First Order Reversal Curves”, Scientific Reports, 4, 4204 (2014).