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Dr Junjie Liu

Junjie

Royal Society University Research Fellow | Lecturer of Physics

Email: junjie.liu@qmul.ac.uk
Room Number: G. O. Jones Building

Profile

Dr Liu joined Queen Mary University in 2024 as a lecturer in quantum technology. He completed his PhD in Physics at the University of Florida in 2012. During his PhD he investigated quantum tunnelling of magnetisation in molecular nanomagnets. His pioneering work included the first discovery of transverse anisotropy-induced slow relaxation of magnetization in these systems. Following his PhD, Dr. Liu moved to the University of Oxford as a post-doctoral researcher, where he worked on a wide spectrum of research topics including: coherent magneto-electric couplings, single-molecule electronic/spintronic devices and low-dimensional quantum magnets. In 2021 he was awarded a University Research Fellowship by the Royal Society. His fellowship aims to control and read out molecular quantum spins using electric fields instead of the more conventional magnetic field couplings.

 

Teaching

DAT4501 Introduction to Data Analysis

 

Research

Research Interests:

Dr. Liu's research focuses on the physics of (sub)nanometer-scale quantum spin systems, such as molecular nanomagnets and semiconductor dopants, and their applications in spintronics. The aims of his research are to investigate the interplay between spin and electrical/optical degrees of freedom within these quantum spin systems, and to identify novel strategies for quantum technology enabled by such interactions. He is also interested in exploring hyperfine-coupled nuclear moments as a qudits, physical systems offering a Hilbert space that is larger than 2 dimensional, as fault-tolerant units for quantum information science.

Scholarly Contributions

You can find the complete list of publications on Google Scholar.

 

Quantum coherent spin-electric control in molecular nanomagnets, Nature Physics 17, 1205 (2021), J. Liu, J. Mrozek, Y. Duan, A. Ullah, J. J. Baldovi, E. Coronado, A. Gaita-Arino and A. Ardavan

DOI: https://doi.org/10.5281/zenodo.5167019

 

Coherent electric field manipulation of Fe3+ spins in PbTiO3, Science Advances 7, eabf8103 (2021), J. Liu, V. V. Laguta, K. Inzani, W. Huang, S. Das, R. Chatterjee, E. Sheridan, S. M. Griffin, A. Ardavan and R. Ramesh

DOI: https://doi.org/10.1126/sciadv.abf8103

 

Electric Field Control of Spins in Molecular Magnets, Physical Review Letter 122, 037202 (2019); J. Liu, J. Mrozek, W. K. Myers, G. A. Timco, R. E. P. Winpenny, B. Kintzel, W. Plass and A. Ardavan

DOI: https://doi.org/10.1103/PhysRevLett.122.037202

 

Strong Coupling of Microwave Photons to Antiferromagnetic Fluctuations in an Organic Magnet, Physical Review Letter 119, 147701 (2017), M. Mergenthaler, J. Liu, J. Le Roy, N. Ares,A. L. Thompson, L. Bogani, F. Luis, S. J. Blundell, T. Lancaster, A. Ardavan, G. A. D. Briggs, P. J. Leek, Peter J and E. A. Laird

DOI: https://doi.org/10.1103/PhysRevLett.119.147701

 

Unconventional Field-Induced Spin Gap in an S=1/2 Chiral Staggered Chain, Physical Review Letter 122, 057207 (2019); J. Liu, S. Kittaka, R. D. Johnson, T. Lancaster, J. Singleton, T. Sakakibara, Y. Kohama, J. van Tol, A. Ardavan, B. H. Williams, S. J. Blundell, Z. E. Manson, J. L. Manson and P. A. Goddard

DOI: https://doi.org/10.1103/PhysRevLett.122.057207

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