News & Events

Congratulations to Ho Yi Lydia Mak (l) and Xuzixiang Lou (r) for being awarded 2021 Academic Achievement Medals. The Academic Achievement Medal is the highest academic honor bestowed by the University on outstanding undergraduate students upon graduation. The awarding of the Medal was established in 1994 to recognize graduates whose outstanding academic achievements bring honor and distinction both to themselves and to the University. Only the top 2-3% of graduates are awarded the Academic Achievement Medal annually.  These awards are to be presented at the University Congregation in Shaw Auditorium on 27 November 2021. We are proud of all graduates and are especially delighted in the accomplishments of the Academic Achievement Medal awardees.   Ho Yi Lydia Mak is currently pursuing an M.Sc. degree in Geoscience and Remote Sensing at Delft University of Technology in Delft, The Netherlands. Xuzixiang Lou is pursuing an M.Sc. degree in High Energy Physics at ETH Zürich in Zürich, Switzerland.   Read more

Researchers in the Department of Physics proposed a new mechanism for creating and manipulating a net magnetization in an antiferromagnetic material and for achieving this desirable property by static and dynamic control schemes. The discovery of the new mechanism was made by Prof. Junwei Liu and members of his research group in collaboration with Prof Jin-feng Jia’s group at Shanghai Jiao Tong University and Prof Wang Yao’s group at Hong Kong University. This discovery will significantly expand existing capabilities to control the magnetization ground state of antiferromagnets. Furthermore, the dynamic control that is made possible by this new mechanism had never been possible before. These breakthroughs have significant importance for future developments in information storage and processing technology. This groundbreaking work was published in Nature Communications 26, 2846 (2021). The new proposed mechanism, called C-paired spin-valley locking (C-paired SVL), can couple an electron’s spin and valley degrees of freedom (DOFs) in antiferromagnets. In contrast to conventional SVL in nonmagnetic materials, such as transition metal dichalcogenides, spin-orbit coupling (SOC) is no longer a necessary condition for producing valley-contrasted spin splitting. This contrast arises instead via the C-paired SVL mechanism from the exchange coupling of itinerant electrons to AFM order. The resulting spin splitting can be very large. Moreover, valleys of opposite spin polarization in an antiferromagnet are paired by a crystal symmetry, instead of the time-reversal symmetry in conventional SVL, to form the emergent quantum degree of freedom. Therefore, both spin and valley DOFs are much easier to access by versatile approaches, such as strain or electric field, that lift the constraint from the corresponding crystal symmetry. In details, one can use a strain to break symmetry between different valleys and hence induce a net static valley polarization and magnetization, and can use an electric field to induce a spin current dynamically that carries a net magnetization, which is an essential ingredient in spintronics device applications. Moreover, the magnetization can be easily manipulated by tuning the direction of strain or electric field. In addition, compared to the conventional spin current in an antiferromagnet with either non-collinear magnetic order or strong spin-orbital couplings, the spin decoherence time facilitated by the C-paired SVL mechanism can be expected to be much longer. This highly desirable property is obtained because spin is still a conversed quantity due to the absence of SOC and the spin-valley locking can significantly suppress the spin decoherence since spin flipping also requires a change of valley index and vice versa. Compared to devices currently in use that manipulate magnetization in ferromagnets to store and manipulate data, devices made of antiferromagnets should be able to achieve much higher storage and processor density and much faster operation speed. However, prior to the discovery of the new C-paied SVL mechanism by Prof. Liu and collaborators, this advantage could not be practically exploited because of the difficulty to create and control magnetization in antiferromagnets. Compared to mechanisms known earlier, which are applicable only to materials with non-collinear antiferromagnetic order or strong SOC, the new mechanism significantly broadens the range of materials that can be manipulated to include the more common collinear antiferromagnets. It also provides unprecedented opportunities to integrate various controls of magnetization and nonvolatile information storage in a single materials, which is highly desirable for versatile research and device applications. Hai-Yang Ma, Mengli Hu, Nana Li, Jianpeng Liu, Wang Yao, Jin-Feng Jia and Junwei Liu, Multifunctional antiferromagnetic materials with giant piezomagnetism and noncollinear spin current, Nature Communications 26, 2846 (2021). Read more

Toby Ting Hin Mak and Tsz Hong Kwok win prestigious Mr Armin and Mrs Lillian Kitchell Undergraduate Research Awards 2021 The Mr. Armin and Mrs. Lillian Kitchell Undergraduate Research Award was established in 2010 to recognize students who demonstrate outstanding performance in the University-wide Undergraduate Research Opportunities Program (UROP) and to promote research culture among undergraduate students.  Mr. Toby Ting Hin MAK won Champion of the Mr Armin and Mrs Lillian Kitchell Undergraduate Research Award competition in 2021. Mr. Mak, a 3rd-year Physics IRE student, has explored the machine learning aided analysis of quantum simulation experiments  under the supervision of Prof. Gyu-Boong Jo since February 2019. In the Prof.Jo's group, Mr. Mak developed a machine learning protocol for analyzing the topological nature of the synthetic quantum system, resulting in unprecedented measurement sensitivity. Mr. Mak's significant contribution to the cutting-edge quantum simulation experiment has been evidenced by several conference papers and a journal paper to be submitted as the leading author. The Second Runner-Up of the Mr Armin and Mrs Lillian Kitchell Undergraduate Research Award competition was Mr. Tsz Hong KWOK. Mr. Kwok is a 4th year physics undergraduate student who carried out his award-winning research under the supervision of Prof. Michael K.Y. Wong. In Prof. Wong’s undergraduate research group on “Latency Prediction in the Taiwan Highway System”, he played a leading role in screening the relevant data, exploring their applicability, and integrating them into a workable system. He explored the pre-clustering of the traffic data before feeding them the learning machines, resulting in around 10% improvement. He presented his work in two international conferences, in Singapore and Hong Kong respectively. Read more

Congratulations to the First Cohort of MSc DDM Graduates: Meeting the Worldwide Demand for Data-Driven Modeling Skills   Congratulations to the first cohort of 47 graduates from the MSc Program in Data-Driven Modeling (MSc-DDM)! The MSc-DDM program is jointly offered by the Departments of Physics and Mathematics. The program was designed to meet the pressing demand in today’s world for human resources in the areas of data-driven modeling, including hardware, software, services, infrastructure, information, and digital business. Prof. Michael Wong, who is the founding Program Director, states that the design of the MSc DDM program “bridges the gaps between theory, practice, and techniques.” Admission to the program is very selective, having attracted interest of hundreds of applicants with strengths in mathematics, statistics and engineering. Our graduates are in high demand, with a 100% placement rate in several sectors in Hong Kong, Shenzhen, Guangzhou, Shanghai, and London. The training they received in the MSc-DDM program prepared them to excel in positions with titles such as  Algorithm Engineer, Administrative Officer, Data Analyst, Product Manager, Programmer and Risk Management. This year, MSc-DDM is selected by the University Grants Council to be part of the Targeted TPG Programmes Fellowships Scheme to nurture more talents to pursue further studies in priority areas conducive to the development of Hong Kong. Local students, both full-time and part-time, who are admitted to the MSc-DDM program in the 2021-22 intake are eligible to apply to the Fellowship Scheme. Part of the tuition fees will be subsidized by the fellowships subject to a cap of HK$120,000 for successful students.  Visit the MSc-DDM program website to learn more about the program and admission details, and let MSc-DDM be the gateway to your future success!   For enquiries, please contact: Florence Cheng Tel: +852 2358 7354 Email: mscddm@ust.hk Read more

Congratulations to Chun Yu Chow, Bohan Li, Shing Yan Li, Wai Ting Tai and Weijun Yuan (l-r) and San Yu Lai (not pictured) for being awarded 2020 Academic Achievement Medals. The Academic Achievement Medal is the highest academic honor bestowed by the University on outstanding undergraduate students upon graduation. The awarding of the Medal was established in 1994 to recognize graduates whose outstanding academic achievements bring honor and distinction both to themselves and to the University. Only the top 2-3% of graduates are awarded the Academic Achievement Medal annually.  These awards were presented at the 27th University Congregation on 8 November 2018. We are proud of all of our graduates, and are especially delighted in the achievements of the Academic Achievement Medal awardees.   Chun Yu Chow is pursuing a Ph.D. degree in Physics at the University of Illinois at Urbana-Champaign.  San Yu Lai is pursuing an M.Phil. degree in Linguistics and Applied Linguistics at Peking University. Bohan Li is pursing a Ph.D. degree in Physics at Caltech. Shing Yan Li is pursuing a Ph.D. degree in Physics at MIT. Wai Ting Tai is pursuing a M.Sc. degree in theoretical physics within the Perimeter Scholars International Program at the Perimeter Institute. Weijun Yuan is pursuing a Ph.D. degree in Physics at Columbia University. Read more

Congratulations to Long Him Cheung, Wan Zhen Chua, Mang Hei Gordon Lee, Gowtham Amirthya Neppoleon and Lingbang Zhu (l-r) for being awarded 2019 Academic Achievement Medals. The Academic Achievement Medal is the highest academic honor bestowed by the University on outstanding undergraduate students upon graduation. The awarding of the Medal was established in 1994 to recognize graduates whose outstanding academic achievements bring honor and distinction both to themselves and to the University. Only the top 2-3% of graduates are awarded the Academic Achievement Medal annually.  These awards were presented at the 27th University Congregation on 8 November 2019. We are proud of all of our graduates, and are especially delighted in the achievements of the Academic Achievement Medal awardees.   Mr. Cheung is pursuing a PhD degree in Physics at the University of Maryland.  Ms. Chua is pursuing a MSc degree in theoretical physics within the Perimeter Scholars International Program at the Perimeter Institute. Mr.  Lee is pursuing a MASt degree in Applied Mathematics at Cambridge University. Mr. Neppoleon is pursuing the MPhil degree in Physics at HKUST. Mr. Zhu is pursuing the PhD degree in Chemical Physics at Harvard University.  Read more