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7 papers · 2 filters
Hydrogen Diffusion and Stabilization in Single-crystal VO2 Micro/nanobeams by Direct Atomic Hydrogenation
Jian Lin, Heng Ji, Michael W. Swift +6
We report measurements of the diffusion of atomic hydrogen in single crystalline VO2 micro/nanobeams by direct exposure to atomic hydrogen, without catalyst. The atomic hydrogen is…
In situ diffraction study of catalytic hydrogenation of VO2: Stable phases and origins of metallicity
Yaroslav Filinchuk, Nikolay A. Tumanov, Voraksmy Ban +5
Controlling electronic population through chemical doping is one way to tip the balance between competing phases in materials with strong electronic correlations. Vanadium dioxide…
Why do nanotubes grow chiral?
Vasilii I. Artyukhov, Evgeni S. Penev, Boris I. Yakobson
Carbon nanotubes (CNT) hold enormous technological promise. It can only be harnessed if one controls in a practical way the CNT chirality, the feature of the tubular carbon topolog…
Breaking of symmetry in graphene growth on metal substrates
Vasilii I. Artyukhov, Yufeng Hao, Rodney S. Ruoff +1
In graphene growth, island symmetry can become lower than the intrinsic symmetries of both graphene and the substrate. First-principles calculations and Monte Carlo modeling explai…
Many-body and spin-orbit effects on direct-indirect band gap transition of strained monolayer MoS and WS
Luqing Wang, Alex Kutana, Boris I. Yakobson
Monolayer transition metal dichalcogenides are promising materials for photoelectronic devices. Among them, molybdenum disulphide (MoS) and tungsten disulphide (WS) are som…
Rapid Scanning Terahertz Time-Domain Magnetospectroscopy with a Table-Top Repetitive Pulsed Magnet
G. T. Noe, Q. Zhang, J. Lee +4
We have performed terahertz time-domain magnetospectroscopy by combining a rapid scanning terahertz time-domain spectrometer based on the electronically coupled optical sampling me…