129 citations · 746 across the 23 of their papers we have counts for
16 papers · 1 filter
Heterometallic spin-1/2 quantum magnet under hydrostatic pressure
M. J. Coak, D. Kamenskyi, S. P. M. Curley +14
We investigate the properties of CuVOF(HO)HO, in which two different spin species, Cu(II) and V(IV), form antiferromagnetic spin-1/2 dimers with weak interdi…
Emergent Polar Metal Phase in a Van der Waals Mott Magnet
Shiyu Deng, Matthew J. Coak, Charles R. S. Haines +16
We report the emergence of a two-dimensional (2D) polar metal phase in van der Waals compound FePSe under moderate pressures. This layered material is a Mott insulator with ant…
Direct evidence from high-field magnetotransport for a dramatic change of quasiparticle character in van der Waals ferromagnet FeGeTe
Shroya Vaidya, Matthew J. Coak, Daniel A. Mayoh +4
Magnetometry and magnetoresistance (MR) data taken on the van der Waals ferromagnet FeGeTe (FGT) reveal three distinct contributions to the MR: a linear negative compon…
Thermal Hall effects due to topological spin fluctuations in YMnO
Ha-Leem Kim, Takuma Saito, Heejun Yang +7
The thermal Hall effect in magnetic insulators has been considered a powerful method for examining the topological nature of charge-neutral quasiparticles such as magnons. Yet, unl…
Asymmetric phase diagram and dimensional crossover in a system of spin-1/2 dimers under applied hydrostatic pressure
M. J. Coak, S. P. M. Curley, Z. Hawkhead +8
We present the magnetic and structural properties of [Cu(pyrazine)(glycine)]ClO under applied pressure. As previously reported, at ambient pressure this material consis…
Magnetotransport of single crystal SmIrO across the pressure-induced quantum-critical phase boundary
M. J. Coak, K. Götze, T. Northam De La Fuente +6
Rare-earth pyrochlore iridates host two interlocking magnetic sublattices of corner-sharing tetrahedra and can harbour a unique combination of frustrated moments, exotic excitation…
Comparative structural evolution under pressure of powder and single crystals of the layered antiferromagnet FePS
David M. Jarvis, Matthew J. Coak, Hayrullo Hamidov +9
The layered antiferromagnet FePS has been shown to undergo a structural transition under pressure linked to an insulator-metal transition, with two incompatible models previous…
Pressure-induced shift of effective Ce valence, Fermi energy and phase boundaries in CeOsSb
K. Götze, M. J. Pearce, M. J. Coak +9
CeOsSb, a member of the skutterudite family, has an unusual semimetallic low-temperature -phase that inhabits a wedge-like area of the field - temperature $…
Anomalous magnetic exchange in a dimerized quantum-magnet composed of unlike spin species
S. P. M. Curley, B. M. Huddart, D. Kamenskyi +15
We present here a study of the magnetic properties of the antiferromagnetic dimer material CuVOF(HO)HO, in which the dimer unit is composed of two different $S…
Sizeable suppression of thermal Hall effect upon isotopic substitution in strontium titanate
Sangwoo Sim, Heejun Yang, Ha-Leem Kim +4
We report measurements of the thermal Hall effect in single crystals of both pristine and isotopically substituted strontium titanate. We discovered a two orders of magnitude diffe…
Evolution of magnetic order in van-der-Waals antiferromagnet FePS through insulator-metal transition
Matthew J. Coak, David M Jarvis, Hayrullo Hamidov +14
Layered van-der-Waals 2D magnetic materials are of great interest in fundamental condensed-matter physics research, as well as for potential applications in spintronics and device…
Pressure dependence of ferroelectric quantum critical fluctuations
M. J. Coak, C. R. S. Haines, C. Liu +2
The effect of ferroelectric fluctuations on the temperature dependent dielectric constant of SrTiO(STO) has been long studied. Those fluctuations have been shown in recent ye…
Isostructural Mott Transition in 2D honeycomb antiferromagnet VPS
M. J. Coak, S. Son, D. Daisenberger +7
We present the observation of an isostructural Mott insulator-metal transition in van-der-Waals honeycomb antiferromagnet VPS through high-pressure x-ray diffraction an…
Bulk properties of van-der-Waals hard ferromagnet VI3
Suhan Son, Matthew J. Coak, Nahyun Lee +12
We present comprehensive measurements of the structural, magnetic and electronic properties of layered van-der-Waals ferromagnet VI down to low temperatures. Despite belonging…
Symmetry breaking and unconventional charge ordering in single crystal NaRuO
Arvind Yogi, C. I. Sathish, Hasung Sim +3
The interplay of charge, spin, and lattice degrees of freedom in matter leads to various forms of ordered states through phase transitions. An important subclass of these phenomena…
Structural and electronic phase transitions in FePS under the application of pressure
C. R. S. Haines, M. J. Coak, G. I. Lampronti +6
Two-dimensional materials have proven to be a prolific breeding ground of new and unstudied forms of magnetism and unusual metallic states, particularly when tuned between their in…