302 citations · 573 across the 19 of their papers we have counts for
19 papers
Doubling of the superconducting transition temperature in ultra-clean wafer-scale aluminum nanofilms
Ching-Chen Yeh, Thi-Hien Do, Pin-Chi Liao +12
Superconducting properties of thin films can be vastly different from those of bulk materials. Seminal work has shown the critical temperature Tc of elemental superconductors decre…
Type III superconductivity
M. C. Diamantini, C. A. Trugenberger, Sheng-Zong Chen +3
Superconductivity remains one of most fascinating quantum phenomena existing on a macroscopic scale. Its rich phenomenology is usually described by the Ginzburg-Landau (GL) theory…
Optical Signatures of Strain Differences in Epitaxial Graphene Nanoribbons
Heather M. Hill, Ching-Chen Yeh, Swapnil M. Mhatre +6
We demonstrate the preparation of both armchair and zigzag epitaxial graphene nanoribbons (GNRs) on 4H-SiC using a polymer-assisted, sublimation growth method. Historically, the pr…
Fabrication of uniformly doped graphene quantum Hall arrays with multiple quantized resistance outputs
Swapnil M. Mhatre, Ngoc Thanh Mai Tran, Heather M. Hill +7
In this work, limiting factors for developing metrologically useful arrays from epitaxial graphene on SiC are lifted with a combination of centimeter-scale, high-quality material g…
Robust fractional quantum Hall effect and composite fermions in the Landau level in bilayer graphene
Georgi Diankov, Chi-Te Liang, Francois Amet +9
The fractional quantum Hall (FQH) effect is a canonical example of electron-electron interactions producing new ground states in many-body systems. Most FQH studies have focused on…
Observation of quantum Hall plateau-plateau transition and scaling behavior of the zeroth Landau level in graphene p-n-p junctions
Cheng-Hua Liu, Po-Hsiang Wang, Tak-Pong Woo +6
We report distinctive magnetotransport properties of a graphene p-n-p junction prepared by controlled diffusion of metallic contacts. In most cases, materials deposited on a graphe…
Low Carrier Density Epitaxial Graphene Devices On SiC
Yanfei Yang, Lung-I Huang, Yasuhiro Fukuyama +6
Monolayer epitaxial graphene (EG) grown on hexagonal Si-terminated SiC substrates is intrinsically electron-doped (carrier density is about 10^13 cm^(-2)). We demonstrate a clean d…
Experimental evidence for direct insulator-quantum Hall transition in multi-layer graphene
Chiashain Chuang, Li-Hung Lin, Nobuyuki Aoki +7
We have performed magnetotransport measurements on a multi-layer graphene flake. At the crossing magnetic field Bc, an approximately temperature-independent point in the measured l…
Nitrogen-Doped Graphene Sheets Grown by Chemical Vapor Deposition: Synthesis and Influence of Nitrogen Impurities on Carrier Transport
Yu-Fen Lu, Shun-Tsung Lo, Jheng-Cyuan Lin +7
A significant advance toward achieving practical applications of graphene as a two-dimensional material in nanoelectronics would be provided by successful synthesis of both n-type…
Ultrahigh-Gain Phototransistors Based on Graphene-MoS2 Heterostructures
Wenjing Zhang, Chih-Piao Chuu, Jing-Kai Huang +7
Due to its high carrier mobility, broadband absorption, and fast response time, graphene is attractive for optoelectronics and photodetection applications. However, the extraction…
Non-magnetic Stern-Gerlach Experiment from Electron Diffraction
Chyh-Hong Chern, Cheng-Ju Lin
Using the wave nature of the electrons, we demonstrate that a transverse spin current can be generated simply by the diffraction through a single slit in the spin-orbital coupling…
Theory of the quantum Hall effect in graphene
Tobias Kramer, Christoph Kreisbeck, Viktor Krueckl +3
We study the quantum Hall effect (QHE) in graphene based on the current injection model. In our model, the presence of disorder, the edge-state picture, extended states and localiz…
Experimental Studies of Low-field Landau Quantization in Two-dimensional Electron Systems in GaAs/AlGaAs Heterostructures
Jing-Han Chen, D. R. Hang, C. F. Huang +8
By applying a magnetic field perpendicular to GaAs/AlGaAs two-dimensional electron systems, we study the low-field Landau quantization when the thermal damping is reduced with decr…
Large transconductance oscillations in a single-well vertical Aharonov-Bohm interferometer
Vincenzo Piazza, Fabio Beltram, Werner Wegscheider +2
Aharonov-Bohm (AB) interference is reported for the first time in the conductance of a vertical nanostructure based on a single GaAs/AlGaAs quantum well (QW). The two lowest subban…
Coulomb Charging Effects in an Open Quantum Dot
O. A. Tkachenko, V. A. Tkachenko, D. G. Baksheyev +6
Low-temperature transport properties of a lateral quantum dot formed by overlaying finger gates in a clean one-dimensional channel are investigated. Continuous and periodic oscilla…
Spin-dependent transport in a quasiballistic quantum wire
C. -T. Liang, M. Pepper, M. Y. Simmons +2
We describe the transport properties of a 5 m long one-dimensional (1D) quantum wire. Reduction of conductance plateaux due to the introduction of weakly disorder scattering are…
Experimental Evidence for Coulomb Charging Effects in an Open Quantum Dot at Zero Magnetic Field
C. -T. Liang, M. Y. Simmons, C. G. Smith +3
We have measured the low-temperature transport properties of an open quantum dot formed in a clean one-dimensional channel. For the first time, at zero magnetic field, continuous a…
Experimental studies of T--shaped quantum dot transistors: phase-coherent electron transport
C. -T. Liang, J. E. F. Frost, M. Pepper +2
We have measured the low-temperature transport properties of a T-shaped quantum dot. Replicated oscillations superimposed on one-dimensional conductance steps are observed. These s…
Resonant transmission through an open quantum dot
C. -T. Liang, I. M. Castleton, J. E. F. Frost +5
We have measured the low-temperature transport properties of a quantum dot formed in a one-dimensional channel. In zero magnetic field this device shows quantized ballistic conduct…