520 citations · 2.3k across the 30 of their papers we have counts for
30 papers
Structural Anisotropy in Sb Thin Films
Pradip Adhikari, Anuradha Wijesinghe, Anjali Rathore +11
Sb thin films have attracted wide interests due to their tunable band structure, topological phases, and remarkable electronic properties. We successfully grow epitaxial Sb thin fi…
Sn/InAs Josephson junctions on selective area grown nanowires with in-situ shadowed superconductor evaporation
Aranya Goswami, Sanchayeta R. Mudi, Connor Dempsey +5
Superconductor-semiconductor nanowire hybrid structures are useful in fabricating devices for quantum information processing. While selective area growth (SAG) offers the flexibili…
Observation of nonlocal Josephson effect on double InAs nanowires
Sadashige Matsuo, Joon Sue Lee, Chien-Yuan Chang +4
Short-range coherent coupling of two Josephson junctions (JJs) are predicted to generate a supercurrent in one JJ nonlocally modulated by the phase difference in the other. We repo…
Supercurrent parity-meter in a nanowire Cooper-pair transistor
Ji-Yin Wang, Constantin Schrade, Vukan Levajac +13
We study a Cooper-pair transistor realized by two Josephson weak links that enclose a superconducting island in an InSb-Al hybrid nanowire. When the nanowire is subject to a magnet…
Large zero-bias peaks in InSb-Al hybrid semiconductor-superconductor nanowire devices
Hao Zhang, Michiel W. A. de Moor, Jouri D. S. Bommer +19
We report electron transport studies on InSb-Al hybrid semiconductor-superconductor nanowire devices. Tunnelling spectroscopy is used to measure the evolution of subgap states whil…
Adsorption-controlled growth of MnTe(Bi2Te3)n by molecular beam epitaxy exhibiting stoichiometry-controlled magnetism
Jason Lapano, Lauren Nuckols, Alessandro R. Mazza +12
We report the growth of the intrinsic magnetic topological system MnTe(Bi2Te3)n by molecular beam epitaxy. By mapping the temperature and the Bi:Mn flux ratio, it is shown that the…
End-to-end correlated subgap states in hybrid nanowires
G. L. R. Anselmetti, E. A. Martinez, G. C. Ménard +9
End-to-end correlated bound states are investigated in superconductor-semiconductor hybrid nanowires at zero magnetic field. Peaks in subgap conductance are independently identifie…
Conductance-matrix symmetries of a three-terminal hybrid device
G. C. Ménard, G. L. R. Anselmetti, E. A. Martinez +10
We present conductance-matrix measurements of a three-terminal superconductor-semiconductor hybrid device consisting of two normal leads and one superconducting lead. Using a symme…
Transport Studies in a Gate-Tunable Three-Terminal Josephson Junction
Gino V. Graziano, Joon Sue Lee, Mihir Pendharkar +2
Josephson junctions with three or more superconducting leads have been predicted to exhibit topological effects in the presence of few conducting modes within the interstitial norm…
Strong Electron-Electron Interactions of a Tomonaga--Luttinger Liquid Observed in InAs Quantum Wires
Yosuke Sato, Sadashige Matsuo, Chen-Hsuan Hsu +12
We report strong electron-electron interactions in quantum wires etched from an InAs quantum well, a material known to have strong spin-orbit interactions. We find that the current…
Contribution of top barrier materials to high mobility in near-surface InAs quantum wells grown on GaSb(001)
Joon Sue Lee, Borzoyeh Shojaei, Mihir Pendharkar +3
Near-surface InAs two-dimensional electron gas (2DEG) systems have great potential for realizing networks of multiple Majorana zero modes towards a scalable topological quantum com…
Large-scale defects hidden inside a topological insulator grown onto a 2D substrate
Danielle Reifsnyder Hickey, Ryan J. Wu, Joon Sue Lee +7
Topological insulator (TI) materials are exciting candidates for integration into next-generation memory and logic devices because of their potential for efficient, low-energy-cons…
Selective-area chemical beam epitaxy of in-plane InAs one-dimensional channels grown on InP(001), InP(111)B, and InP(110) surfaces
Joon Sue Lee, Sukgeun Choi, Mihir Pendharkar +15
We report on the selective-area chemical beam epitaxial growth of InAs in-plane, one-dimensional (1-D) channels using patterned SiO-coated InP(001), InP(111)B, and InP(110) s…
Electric field tunable superconductor-semiconductor coupling in Majorana nanowires
Michiel W. A. de Moor, Jouri D. S. Bommer, Di Xu +16
We study the effect of external electric fields on superconductor-semiconductor coupling by measuring the electron transport in InSb semiconductor nanowires coupled to an epitaxial…
Quantized Majorana conductance
Hao Zhang, Chun-Xiao Liu, Sasa Gazibegovic +19
Majorana zero-modes hold great promise for topological quantum computing. Tunnelling spectroscopy in electrical transport is the primary tool to identify the presence of Majorana z…
Materials considerations for forming the topological insulator phase in InAs/GaSb heterostructures
Borzoyeh Shojaei, Anthony P. McFadden, Mihir Pendharkar +3
In an ideal InAs/GaSb bilayer of appropriate dimension in-plane electron and hole bands overlap and hybridize, and a topologically non-trivial, or quantum spin Hall (QSH) insulator…
Engineering the breaking of time-reversal symmetry in gate-tunable hybrid ferromagnet/topological insulator heterostructures
Joon Sue Lee, Anthony Richardella, Robert D. Fraleigh +3
Studying the influence of breaking time-reversal symmetry on topological insulator surface states is an important problem of current interest in condensed matter physics and could…
Transport studies of epi-Al/InAs 2DEG systems for required building-blocks in topological superconductor networks
Joon Sue Lee, Borzoyeh Shojaei, Mihir Pendharkar +7
One-dimensional (1D) electronic transport and induced superconductivity in semiconductor nano-structures are crucial ingredients to realize topological superconductivity. Our appro…
Epitaxy of Advanced Nanowire Quantum Devices
Sasa Gazibegovic, Diana Car, Hao Zhang +20
Semiconductor nanowires provide an ideal platform for various low-dimensional quantum devices. In particular, topological phases of matter hosting non-Abelian quasi-particles can e…
Unidirectional spin Hall magnetoresistance in topological insulator/ferromagnetic layer heterostructures
Yang Lv, James Kally, Delin Zhang +4
The large spin orbit coupling in topological insulators results in helical spin-textured Dirac surface states that are attractive for topological spintronics. These states generate…
Faraday rotation due to surface states in the topological insulator (BiSb)Te
Yinming Shao, Kirk W. Post, Jhih-Sheng Wu +9
Using magneto-infrared spectroscopy, we have explored the charge dynamics of (Bi,Sb)Te thin films on InP substrates. From the magneto-transmission data we extracted three d…
Surface state dominated spin-charge current conversion in topological insulator/ferromagnetic insulator heterostructures
Hailong Wang, James Kally, Joon Sue Lee +7
We report the observation of ferromagnetic resonance-driven spin pumping signals at room temperature in three-dimensional topological insulator thin films -- Bi2Se3 and (Bi,Sb)2Te3…
Mapping the chemical potential dependence of current-induced spin polarization in a topological insulator
Joon Sue Lee, Anthony Richardella, Danielle Reifsnyder Hickey +2
We report electrical measurements of the current-induced spin polarization of the surface current in topological insulator devices where contributions from bulk and surface conduct…
Characterizing the Structure of Topological Insulator Thin Films
Anthony Richardella, Abhinav Kandala, Joon Sue Lee +1
We describe the characterization of structural defects that occur during molecular beam epitaxy of topological insulator thin films on commonly used substrates. Twinned domains are…