222 citations · 709 across the 9 of their papers we have counts for
9 papers
Topological insulator based spin valve devices: evidence for spin polarized transport of spin-momentum-locked topological surface states
Jifa Tian, Isaac Childres, Helin Cao +3
Spin-momentum helical locking is one of the most important properties of the nontrivial topological surface states (TSS) in 3D topological insulators (TI). It underlies the iconic…
Synthetic Graphene Grown by Chemical Vapor Deposition on Copper Foils
Ting Fung Chung, Tian Shen, Helin Cao +5
The discovery of graphene, a single layer of covalently bonded carbon atoms, has attracted intense interests. Initial studies using mechanically exfoliated graphene unveiled its re…
UV/Ozone treatment to reduce metal-graphene contact resistance
Wei Li, Yiran Liang, Dangmin Yu +10
We report reduced contact resistance of single-layer graphene devices by using ultraviolet ozone (UVO) treatment to modify the metal/graphene contact interface. The devices were fa…
Quantum-Hall plateau-plateau transition in top-gated epitaxial graphene grown on SiC (0001)
Tian Shen, Adam T. Neal, Michael L. Bolen +4
We investigate the low-temperature magneto-transport properties of monolayer epitaxial graphene films formed on the Si-face of semi-insulating 4H-SiC substrates by a high temperatu…
Quantum Hall effect on centimeter scale chemical vapor deposited graphene films
Tian Shen, Wei Wu, Qingkai Yu +4
We report observations of well developed half integer quantum Hall effect (QHE) on mono layer graphene films of 7 mm \times 7 mm in size. The graphene films are grown by chemical v…
Observation of Quantized Hall Effect and Shubnikov-de Hass Oscillations in Highly Doped Bi2Se3: Evidence for Layered Transport of Bulk Carriers
Helin Cao, Jifa Tian, Ireneusz Miotkowski +4
Bi2Se3 is an important semiconductor thermoelectric material and a prototype topological insulator. Here we report observation of Shubnikov-de Hass (SdH) oscillations accompanied b…