323 citations · 1.6k across the 18 of their papers we have counts for
18 papers
Visualization of Local Conductance in MoS2/WSe2 Heterostructure Transistors
Di Wu, Wei Li, Amritesh Rai +7
The vertical stacking of van der Waals (vdW) materials introduces a new degree of freedom to the research of two-dimensional (2D) systems. The interlayer coupling strongly influenc…
Spin-Conserving Resonant Tunneling in Twist-Controlled WSe2-hBN-WSe2 Heterostructures
Kyounghwan Kim, Nitin Prasad, Hema C. P. Movva +7
We investigate interlayer tunneling in heterostructures consisting of two tungsten diselenide (WSe2) monolayers with controlled rotational alignment, and separated by hexagonal bor…
Large effective mass and interaction-enhanced Zeeman splitting of -valley electrons in MoSe
Stefano Larentis, Hema C. P. Movva, Babak Fallahazad +6
We study the magnetotransport of high-mobility electrons in monolayer and bilayer MoSe, which show Shubnikov-de Haas (SdH) oscillations and quantum Hall states in high magnetic…
Tunable Valley Populations in Hole-Doped Trilayer WSe
Hema C. P. Movva, Timothy Lovorn, Babak Fallahazad +7
We present a combined experimental and theoretical study of valley populations in the valence bands of trilayer WSe. Shubnikovde Haas oscillations show that trilayer holes p…
Accelerated Carrier Recombination by Grain Boundary/Edge Defects in MBE Grown Transition Metal Dichalcogenides
Ke Chen, Anupam Roy, Amritesh Rai +5
Defect-carrier interaction in transition metal dichalcogenides (TMDs) play important roles in carrier relaxation dynamics and carrier transport, which determines the performance of…
Versatile Large-Area Custom-Feature van der Waals Epitaxy of Topological Insulators
Tanuj Trivedi, Anupam Roy, Hema C. P. Movva +4
As the focus of applied research in topological insulators (TI) evolves, the need to synthesize large-area TI films for practical device applications takes center stage. However, c…
Angular dependence of magnetization reversal in epitaxial chromium telluride thin films with perpendicular magnetic anisotropy
Tanmoy Pramanik, Anupam Roy, Rik Dey +5
We investigate magnetic anisotropy and magnetization reversal mechanism in chromium telluride thin films grown by molecular beam epitaxy. We report existence of strong perpendicula…
Intra-Domain Periodic Defects in Monolayer MoS
Anupam Roy, Rudresh Ghosh, Amritesh Rai +8
We present an ultra-high vacuum scanning tunneling microscopy (STM) study of structural defects in molybdenum disulfide thin films grown on silicon substrates by chemical vapor dep…
High density nonmagnetic cobalt in thin films
Nasrin Banu, Surendra Singh, Saibal Basu +3
Recently high density (HD) nonmagnetic (NM) cobalt has been discovered in a cobalt thin film, grown on Si(111). This cobalt film had a natural cobalt oxide at the top. The oxide la…
Density-Dependent Quantum Hall States and Zeeman Splitting in Monolayer and Bilayer WSe
Hema C. P. Movva, Babak Fallahazad, Kyounghwan Kim +5
We report a study of the quantum Hall states (QHSs) sequence of holes in mono- and bilayer WSe. The QHSs sequence transitions between predominantly even and predominantly odd f…
Air Stable Doping and Intrinsic Mobility Enhancement in Monolayer by Amorphous Encapsulation
Amritesh Rai, Amithraj Valsaraj, Hema C. P. Movva +12
To reduce Schottky-barrier-induced contact and access resistance, and the impact of charged impurity and phonon scattering on mobility in devices based on 2D transition metal dicha…
Structural and Electrical Properties of MoTe and MoSe Grown by Molecular Beam Epitaxy
Anupam Roy, Hema C. P. Movva, Biswarup Satpati +7
We demonstrate the growth of thin films of molybdenum ditelluride and molybdenum diselenide on sapphire substrates by molecular beam epitaxy. In-situ structural and chemical analys…
Evidence of Formation of Superdense Nonmagnetic Cobalt
Nasrin Banu, Surendra Singh, B. Satpati +6
Magnetism of 3d transition metals at high density has always received wide interest due to existence of magnetism at the core of the Earth. For ferromagnetic cobalt, although there…
Shubnikov-de Haas oscillations of high mobility holes in monolayer and bilayer WSe: Landau level degeneracy, effective mass, and negative compressibility
Babak Fallahazad, Hema C. P. Movva, Kyounghwan Kim +5
We study the magnetotransport properties of high mobility holes in monolayer and bilayer WSe, which display well defined Shubnikov-de Haas (SdH) oscillations, and quantum Hall…
Weak Antilocalization and Universal Conductance Fluctuations in Bismuth Telluro-Sulfide Topological Insulators
Tanuj Trivedi, Sushant Sonde, Hema C. P. Movva +1
We report on van der Waals epitaxial growth, materials characterization and magnetotransport experiments in crystalline nanosheets of Bismuth Telluro-Sulfide (BTS). Highly layered,…
High-Mobility Holes in Dual-Gated WSe Field-Effect Transistors
Hema C. P. Movva, Amritesh Rai, Sangwoo Kang +6
We demonstrate dual-gated -type field-effect transistors (FETs) based on few-layer tungsten diselenide (WSe) using high work-function platinum source/drain contacts, and a h…
Gate-Tunable Resonant Tunneling in Double Bilayer Graphene Heterostructures
Babak Fallahazad, Kayoung Lee, Sangwoo Kang +10
We demonstrate gate-tunable resonant tunneling and negative differential resistance in the interlayer current-voltage characteristics of rotationally aligned double bilayer graphen…
Theory and synthesis of bilayer graphene intercalated with ICl and IBr for low power device applications
Priyamvada Jadaun, Hema C. P. Movva, Leonard F. Register +1
Graphene intercalation materials are potentially promising for the implementation of the ultra-low power, excitonic-condensate-based Bilayer pseudoSpin Field-Effect Transistor (BiS…