Dr Benjamin Huddart: Publications

Position-dependent stability and lifetime of the skyrmion state in nickel-substituted Cu2OSeO3

Physical Review B American Physical Society (APS) 102:22 (2020) 224407

Authors:

M Crisanti, MT Birch, MN Wilson, SH Moody, A Štefančič, BM Huddart, S Cabeza, G Balakrishnan, PD Hatton, R Cubitt

Megahertz dynamics in skyrmion systems probed with muon-spin relaxation

(2020)

Authors:

TJ Hicken, MN Wilson, KJA Franke, BM Huddart, Z Hawkhead, M Gomilšek, SJ Clark, FL Pratt, A Štefančič, AE Hall, M Ciomaga Hatnean, G Balakrishnan, T Lancaster

Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange

Physical Review B American Physical Society 102:17 (2020) 174429

Authors:

F Xiao, Wja Blackmore, Bm Huddart, M Gomilsek, Tj Hicken, C Baines, Pj Baker, Fl Pratt, Sj Blundell, H Lu, J Singleton, D Gawryluk, Mm Turnbull, Kw Kramer, Pa Goddard, T Lancaster

Abstract:

We present an investigation of the effect of randomizing exchange coupling strengths in the S=1/2 square lattice quasi-two-dimensional quantum Heisenberg antiferromagnet (QHAF) (QuinH)2Cu(ClxBr1-x)4·2H2O (QuinH = Quinolinium, C9H8N+), with 0≤x≤1. Pulsed-field magnetization measurements allow us to estimate an effective in-plane exchange strength J in a regime where exchange fosters short-range order, while the temperature TN at which long-range order (LRO) occurs is found using muon-spin relaxation, allowing us to construct a phase diagram for the series. We evaluate the effectiveness of disorder in suppressing TN and the ordered moment size, and we find an extended disordered phase in the region 0.4≲x≲0.8 where no magnetic order occurs. The observed critical substitution levels are accounted for by an energetics-based competition between different local magnetic orders. Furthermore, we demonstrate experimentally that the ground-state disorder is driven by quantum effects of the exchange randomness, which is a feature that has been predicted theoretically and has implications for other disordered quasi-two-dimensional QHAFs.

From magnetic order to quantum disorder in the Zn-barlowite series of S = 1/2 kagomé antiferromagnets

npj Quantum Materials Springer Nature 5:1 (2020) 74

Authors:

Katherine Tustain, Brendan Ward-O’Brien, Fabrice Bert, Tianheng Han, Hubertus Luetkens, Tom Lancaster, Benjamin M Huddart, Peter J Baker, Lucy Clark

Quantum Phases and Spin Liquid Properties of 1T-TaS2

(2020)

Authors:

Samuel Mañas-Valero, Benjamin Huddart, Tom Lancaster, Eugenio Coronado, Francis Pratt

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