Dr Junjie Liu
Lecturer in Quantum Technology
School of Physical and Chemical Sciences
Queen Mary University of London
Queen Mary University of London
Research
Quantum technology, molecular nanomagnets, magnetic resonance, magnetoelectric
Interests
My 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 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. I am also interested in exploring hyperfine-coupled nuclear moments as a qudits, physical systems offering a Hilbert space that is larger than 2 dimensional, as a hardware efficient approach for the implementation of fault-tolerant units for quantum information science.Publications
Publications of specific relevance to the Centre for Experimental and Applied Physics2025
Chemical tuning of quantum spin–electric coupling in molecular magnetsVaganov MV Suaud N Lambert F Cahier B Herrero C Guillot R Barra A-L Guihéry N et al.
Nature Chemistry, Springer Nature, 1-7.
27-08-2025
A scalable, reproducible platform for molecular electronic technologiesHelmi S Liu J Andrews K Schreiber R Bath J Anderson HL Turberfield AJ Ardavan A
17-03-2025
Demonstrating Experimentally the Encoding and Dynamics of an Error-Correctable Logical Qubit on a Hyperfine-Coupled Nuclear Spin QuditLim S Vaganov MV Liu J Ardavan A
Physical Review Letters, American Physical Society (Aps) vol. 134 (7)
20-02-2025
2024
Chemical tuning of quantum spin-electric coupling in molecular
nanomagnetsVaganov MV Suaud N Lambert F Cahier B Herrero C Guillot R Barra A-L Guihery N et al.
03-09-2024
Demonstrating experimentally the encoding and dynamics of an
error-correctable logical qubit on a hyperfine-coupled nuclear spin quditLim S Vaganov MV Liu J Ardavan A
31-05-2024
2023
Fault-tolerant qubit encoding using a spin-7/2 quditLim S Liu J Ardavan A
Physical Review A, American Physical Society (Aps) vol. 108 (6)
01-12-2023
Experimental realisation of multi-qubit gates using electron paramagnetic resonanceLittle EJ Mrozek J Rogers CJ Liu J McInnes EJL Bowen AM Ardavan A Winpenny REP
Nature Communications, Springer Nature vol. 14 (1)
02-11-2023
Probing the Local Electronic Structure in Metal Halide Perovskites through Cobalt SubstitutionHaghighirad AA Klug MT Duffy L Liu J Ardavan A van der Laan G Hesjedal T Snaith HJ
Small Methods, Wiley vol. 7 (6)
12-03-2023
Fault-tolerant qubit encoding using a spin-7/2 quditLim S Liu J Ardavan A
03-03-2023
2022
Inherent Spin–Polarization Coupling in a Magnetoelectric VortexDas S Laguta V Inzani K Huang W Liu J Chatterjee R McCarter MR Susarla S et al.
Nano Letters, American Chemical Society (Acs) vol. 22 (10), 3976-3982.
13-05-2022
2021
Quantum coherent spin–electric control in a molecular nanomagnet at clock transitionsLiu J Mrozek J Ullah A Duan Y Baldoví JJ Coronado E Gaita-Ariño A Ardavan A
Nature Physics, Springer Nature vol. 17 (11), 1205-1209.
14-10-2021
Coherent electric field manipulation of Fe3+ spins in PbTiO3Liu J Laguta VV Inzani K Huang W Das S Chatterjee R Sheridan E Griffin SM et al.
Science Advances, American Association For The Advancement of Science (Aaas) vol. 7 (10)
03-03-2021
2020
Quantum coherent spin-electric control in a molecular nanomagnet at
clock transitionsLiu J Mrozek J Ullah A Duan Y Baldoví JJ Coronado E Gaita-Ariño A Ardavan A
03-05-2020
Spontaneous Rotation of Ferrimagnetism Driven by Antiferromagnetic Spin CantingVibhakar AM Khalyavin DD Manuel P Liu J Belik AA Johnson RD
Physical Review Letters, American Physical Society (Aps) vol. 124 (12)
23-03-2020
2019
Unconventional Field-Induced Spin Gap in an S=1/2 Chiral Staggered ChainLiu J Kittaka S Johnson RD Lancaster T Singleton J Sakakibara T Kohama Y van Tol J et al.
Physical Review Letters, American Physical Society (Aps) vol. 122 (5)
08-02-2019
Electric Field Control of Spins in Molecular MagnetsLiu J Mrozek J Myers WK Timco GA Winpenny REP Kintzel B Plass W Ardavan A
Physical Review Letters, American Physical Society (Aps) vol. 122 (3)
25-01-2019
Unconventional field-induced spin gap in an $S = 1/2$ chiral staggered
chainLiu J Kittaka S Johnson RD Lancaster T Singleton J Sakakibara T Kohama Y Tol JV et al.
08-01-2019
2018
Electric field control of spins in molecular magnetsLiu J Mrozek J Myers WK Timco GA Winpenny REP Kintzel B Plass W Ardavan A
14-05-2018
Implications of bond disorder in a S=1 kagome latticeManson JL Brambleby J Goddard PA Spurgeon PM Villa JA Liu J Ghannadzadeh S Foronda F et al.
Scientific Reports, Springer Nature vol. 8 (1)
16-03-2018
Endohedral Metallofullerene as Molecular High Spin Qubit: Diverse Rabi Cycles in Gd2@C79NHu Z Dong B-W Liu Z Liu J-J Su J Yu C Xiong J Shi D-E et al.
Journal of The American Chemical Society, American Chemical Society (Acs) vol. 140 (3), 1123-1130.
10-01-2018
Molecular electronic spin qubits from a spin-frustrated trinuclear copper complexKintzel B Böhme M Liu J Burkhardt A Mrozek J Buchholz A Ardavan A Plass W
Chemical Communications, Royal Society of Chemistry (Rsc) vol. 54 (92), 12934-12937.
01-01-2018
2017
Strong Coupling of Microwave Photons to Antiferromagnetic Fluctuations in an Organic MagnetMergenthaler M Liu J Le Roy JJ Ares N Thompson AL Bogani L Luis F Blundell SJ et al.
Physical Review Letters, American Physical Society (Aps) vol. 119 (14)
02-10-2017
Strong coupling of microwave photons to antiferromagnetic fluctuations
in an organic magnetMergenthaler M Liu J Roy JJL Ares N Thompson AL Bogani L Luis F Blundell SJ et al.
17-03-2017
Magneto-Structural Correlations in Pseudotetrahedral Forms of the [Co(SPh)4]2– Complex Probed by Magnetometry, MCD Spectroscopy, Advanced EPR Techniques, and ab Initio Electronic Structure CalculationsSuturina EA Nehrkorn J Zadrozny JM Liu J Atanasov M Weyhermüller T Maganas D Hill S et al.
Inorganic Chemistry, American Chemical Society (Acs) vol. 56 (5), 3102-3118.
22-02-2017
2016
Quantum Interference in Graphene NanoconstrictionsGehring P Sadeghi H Sangtarash S Lau CS Liu J Ardavan A Warner JH Lambert CJ et al.
In Arxiv
07-09-2016
Quantum Interference in Graphene NanoconstrictionsGehring P Sadeghi H Sangtarash S Lau CS Liu J Ardavan A Warner JH Lambert CJ et al.
Nano Letters vol. 16 (7), 4210-4216.
13-07-2016
Antiferromagnetism in a Family of S = 1 Square Lattice Coordination Polymers NiX2(pyz)2 (X = Cl, Br, I, NCS; pyz = Pyrazine)Liu J Goddard PA Singleton J Brambleby J Foronda F Möller JS Kohama Y Ghannadzadeh S et al.
Inorganic Chemistry, American Chemical Society (Acs) vol. 55 (7), 3515-3529.
22-03-2016
2015
Three-terminal graphene single-electron transistor fabricated using feedback-controlled electroburningPuczkarski P Gehring P Lau CS Liu J Ardavan A Warner JH Briggs GAD Mol JA
Applied Physics Letters, Aip Publishing vol. 107 (13)
28-09-2015
Three-terminal graphene single-electron transistor fabricated using feedback-controlled electroburningPuczkarski P Gehring P Lau CS Liu J Ardavan A Warner JH Briggs GAD Mol JA
In Arxiv
22-09-2015
2014
Magnetism in a family of $S = 1$ square lattice antiferromagnets
Ni$X_2$(pyz)$_2$ ($X = $ Cl, Br, I, NCS; pyz = pyrazine)Liu J Goddard PA Singleton J Brambleby J Foronda F Möller JS Kohama Y Ghannadzadeh S et al.
12-10-2014
2013
Single-crystal EPR spectroscopy of a Co(II) single-chain magnetAmjad A Espallargas GM Liu J Clemente-Juan JM Coronado E Hill S del Barco E
Polyhedron, Elsevier vol. 66, 218-221.
01-12-2013
Giant Ising-Type Magnetic Anisotropy in Trigonal Bipyramidal Ni(II) Complexes: Experiment and TheoryRuamps R Maurice R Batchelor L Boggio-Pasqua M Guillot R Barra AL Liu J Bendeif E-E et al.
Journal of The American Chemical Society, American Chemical Society (Acs) vol. 135 (8), 3017-3026.
15-02-2013
Quantifying magnetic exchange in doubly-bridged Cu–X 2 –Cu (X = F, Cl, Br) chains enabled by solid state synthesis of CuF 2 (pyrazine)Lapidus SH Manson JL Liu J Smith MJ Goddard P Bendix J Topping CV Singleton J et al.
Chemical Communications, Royal Society of Chemistry (Rsc) vol. 49 (34), 3558-3560.
01-01-2013
Synthetic, structural, spectroscopic and theoretical study of a Mn( iii )–Cu( ii ) dimer containing a Jahn–Teller compressed Mn ionBerg N Hooper TN Liu J Beedle CC Singh SK Rajaraman G Piligkos S Hill S et al.
Dalton Transactions, Royal Society of Chemistry (Rsc) vol. 42 (1), 207-216.
01-01-2013
2012
Elucidating Magnetic Exchange and Anisotropy in Weakly Coupled MnIII DimersLiu J Krzystek J Hill S Barrios L Aromı́ G
Inorganic Chemistry, American Chemical Society (Acs) vol. 52 (2), 718-723.
28-12-2012
Slow Magnetic Relaxation Induced by a Large Transverse Zero-Field Splitting in a MnIIReIV(CN)2 Single-Chain MagnetFeng X Liu J Harris TD Hill S Long JR
Journal of The American Chemical Society, American Chemical Society (Acs) vol. 134 (17), 7521-7529.
19-04-2012
Slow magnetic relaxation in a pseudotetrahedral cobalt( ii ) complex with easy-plane anisotropyZadrozny JM Liu J Piro NA Chang CJ Hill S Long JR
Chemical Communications, Royal Society of Chemistry (Rsc) vol. 48 (33), 3927-3929.
01-01-2012
2011
Relieving frustration: The case of antiferromagnetic Mn3 molecular trianglesLiu J Koo C Amjad A Feng PL Choi E-S del Barco E Hendrickson DN Hill S
Physical Review B, American Physical Society (Aps) vol. 84 (9)
01-09-2011
Cationic Mn4 Single-Molecule Magnet with a Sterically Isolated CoreHeroux KJ Quddusi HM Liu J O’Brien JR Nakano M del Barco E Hill S Hendrickson DN
Inorganic Chemistry, American Chemical Society (Acs) vol. 50 (16), 7367-7369.
13-07-2011
Asymmetric Berry-Phase Interference Patterns in a Single-Molecule MagnetQuddusi HM Liu J Singh S Heroux KJ del Barco E Hill S Hendrickson DN
Physical Review Letters, American Physical Society (Aps) vol. 106 (22)
31-05-2011
Accidentally on purpose: construction of a ferromagnetic, oxime -based [Mn III 2 ] dimerInglis R Houton E Liu J Prescimone A Cano J Piligkos S Hill S Jones LF et al.
Dalton Transactions, Royal Society of Chemistry (Rsc) vol. 40 (39), 9999-10006.
01-01-2011
2010
Magnetic quantum tunneling: insights from simple molecule-based magnetsHill S Datta S Liu J Inglis R Milios CJ Feng PL Henderson JJ del Barco E et al.
Dalton Transactions, Royal Society of Chemistry (Rsc) vol. 39 (20), 4693-4707.
01-01-2010
Grants
Grants of specific relevance to the Centre for Experimental and Applied PhysicsURF transfer: Coherent control of molecular spin qubits by electric fieldJunjie Liu
£213,902 Royal Society
01-04-2024 - 31-12-2025
Research Group
PhD Students
- Daisy Lindley
Coherent Spin-Electric Coupling For Quantum Technology - Oliver Pemble
Chem Project
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