234 citations · 510 across the 25 of their papers we have counts for
19 papers · 1 filter
Customized spin spirals in ferromagnetic thin films
Anjali Panchwanee, Kai Schlage, Dieter Lott +8
The advancement of spintronic nanoscale devices hinges on the ability to flexibly engineer magnetic spin structures in thin-film stacks with precision and control. Meeting this dem…
Lithium-ion dynamics in synthetic quartz studied via the NMR of implanted Li
W. Andrew MacFarlane, Ryan M. L. McFadden, Signy Spencer +11
We report -detected nuclear magnetic resonance (-NMR) measurements of implanted Li in a synthetic single crystal of -SiO (quartz). At 6.55 Tesla, the spect…
Two dimensional magnets: Forgotten history and recent progress towards spintronic applications
David L. Cortie, Grace L. Causer, Kirrily C. Rule +3
The recent discovery of two-dimensional magnetic order in van-der Waals materials has stimulated a renaissance in the field of atomically-thin magnets. This has led to promising de…
Massive Dirac Fermions and Strong Shubnikov-de Haas Oscillations in Topological Insulator Sm,Fe:Bi2Se3 Single Crystals
Weiyao Zhao, Chi Xuan Trang, Qile Li +9
Topological insulators (TIs) are emergent materials with unique band structure, which allow the study of quantum effect in solids, as well as contribute to high performance quantum…
Possible Excitonic Insulating Phase in Quantum-Confined Sb Nanoflakes
Zhi Li, Muhammad Nadeem, Zengji Yue +3
In the 1960s, it was proposed that in small indirect band-gap materials, excitons can spontaneously form because the density of carriers is too low to screen the attractive Coulomb…
Magnetotransport and Berry phase Tuning in Gd-doped Bi2Se3 Topological Insulator Single Crystals
Lei Chen, Shuang-Shuang Li, Weiyao Zhao +6
The Berry phase is an important concept in solids, correlated to the band topology, axion electrodynamics and potential applications of topological materials. Here, we investigate…
Topological Insulator VxBi1.08-xSn0.02Sb0.9Te2S as a Promising n-type Thermoelectric Material
Lei Chen, Weiyao Zhaoa, Meng Li +8
As one of the most important n-type thermoelectric (TE) materials, Bi2Te3 has been studied for decades, with efforts to enhance the thermoelectric performance based on element dopi…
Antiferromagnetic topological insulating state in TbBiSbTeS single crystals
Lei Guo, Weiyao Zhao, Qile Li +13
Topological insulators are emerging materials with insulating bulk and symmetry protected nontrivial surface states. One of the most fascinating transport behaviors in a topologica…
Depth-resolved measurement of the Meissner screening profile in a niobium thin film from spin-lattice relaxation of the implanted -emitter Li
Ryan M. L. McFadden, Md Asaduzzaman, Terry J. Buck +11
We report measurements of the Meissner screening profile in a Nb(300 nm)/AlO thin film using Li -detected nuclear magnetic resonance (-NMR). The NMR probe $…
Increased Phase Coherence Length in a Porous Topological Insulator
Alex Nguyen, Golrokh Akhgar, David L. Cortie +11
The surface area of Bi2Te3 thin films was increased by introducing nanoscale porosity. Temperature dependent resistivity and magnetotransport measurements were conducted both on as…
Local electronic and magnetic properties of the doped topological insulators BiSe:Ca and BiTe:Mn investigated using ion-implanted Li -NMR
Ryan M. L. McFadden, Aris Chatzichristos, David L. Cortie +13
We report -detected nuclear magnetic resonance (-NMR) measurements in BiSe:Ca (BSC) and BiTe:Mn (BTM) single crystals using Li implanted t…
Observation of a charge-neutral muon-polaron complex in antiferromagnetic CrO
M. H. Dehn, J. K. Shenton, S. Holenstein +13
We report a comprehensive muon spin rotation (SR) study of the prototypical magnetoelectric antiferromagnet CrO. We find the positively charged muon () occupies sev…
Does the boson peak survive in an ultrathin oxide glass?
D. L. Cortie, M. J. Cyster, J. S. Smith +7
Bulk glasses exhibit extra vibrational modes at low energies, known as the boson peak. The microscopic dynamics in nanoscale alumina impact the performance of qubits and other supe…
Modulation of crystal and electronic structures in topological insulators by rare-earth doping
Zengji Yue, Weiyao Zhao, David Cortie +3
We study magnetotransport in a rare earth doped topological insulator, Sm0.1Sb1.9Te3 single crystals, under magnetic fields up to 14 T. It is found that that the crystals exhibit S…
Giant and Linear Magnetoresistance in Liquid Metals at Ambient Temperature
Xiaolin Wang, Feixiang Xiang, David Cortie +4
Disorder-induced magnetoresistance has been reported in a range of solid metals and semiconductors, however, the underlying physical mechanism is still under debate because it is d…
Quantum Oscillations in iron-doped topological insulator Sb2Te3 crystals
Weiyao Zhao, David Cortie, Lei Chen +3
We investigated the magnetotransport properties of Fe-doped topological insulator Sb1.96 Fe0.04Te3 single crystals. With doping, the band structure changes significantly and multip…
Ionic and electronic properties of the topological insulator BiTeSe investigated using -detected nuclear magnetic relaxation and resonance of Li
Ryan M. L. McFadden, Aris Chatzichristos, Kim H. Chow +16
We report measurements on the high temperature ionic and low temperature electronic properties of the 3D topological insulator BiTeSe using ion-implanted Li -detecte…
Microscopic Dynamics of Li in Rutile TiO Revealed by Li -detected NMR
Ryan M. L. McFadden, Terry J. Buck, Aris Chatzichristos +19
We report measurements of the dynamics of isolated Li in single crystal rutile TiO using -detected NMR. From spin-lattice relaxation and motional narrowing, we…
Determination of the nature of fluctuations using and -NMR and spin-lattice relaxation
A. Chatzichristos, R. M. L. McFadden, V. L. Karner +7
We report a comparison of the spin lattice relaxation rates (SLR) for and in Pt and SrTiO, in order to differentiate between magnetic and electric quadr…