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Dimensionality-dependent type-II Weyl semimetal state in MoWTe
Peiling Li, Ya Deng, Chuanghan Hsu +15
Weyl nodes and Fermi arcs in type-II Weyl semimetals (WSMs) have led to lots of exotic transport phenomena. Recently, MoWTe has been established as a type-I…
Magnitude and Spatial Distribution Control of the Supercurrent in Bi2O2Se-Based Josephson Junction
Jianghua Ying, Jiangbo He, Guang Yang +15
Many proposals in exploring topological quantum computation are based on superconducting quantum devices constructed on materials with strong spin-orbit coupling (SOC). For these d…
Gate-tunable h/e-period magnetoresistance oscillations in Bi2O2Se nanowires
Jianghua Ying, Guang Yang, Zhaozheng Lyu +8
We report on the successful synthesis and low-temperature electron transport investigations of a new form of material - Bi2O2Se semiconducting nanowires. Gate-tunable 0- and -h/…
Phase evolution and superconductivity enhancement in Se-substituted MoTe thin films
Peiling Li, Jian Cui, Jiadong Zhou +12
The strong spinorbit coupling (SOC) and numerous crystal phases in fewlayer transition metal dichalcogenides (TMDCs) MX (MW, Mo, and XTe, Se, S) has led to a variet…
Evidence of Majorana Zero Modes in Josephson Trijunctions
Guang Yang, Zhaozheng Lyu, Junhua Wang +9
In search of fault-tolerant topological quantum computation (TQC), zero-bias conductance peak as a necessary signature of Majorana zero modes (MZMs) has been observed in a number o…
Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
Cui-Zu Chang, Jinsong Zhang, Xiao Feng +20
The quantized version of the anomalous Hall effect has been predicted to occur in magnetic topological insulators, but the experimental realization has been challenging. Here, we r…
Protected gap closing in Josephson junctions constructed on BiTe surface
Zhaozheng Lyu, Yuan Pang, Junhua Wang +7
On the road of searching for Majorana zero modes (MZMs) in topological insulator-based Josephson junctions, a highly-sought signature is the protected full transparency of electron…
Majorana fermions in a superconducting Mobius strip
Yuan Pang, Jie Shen, Junhua Wang +12
Recently, much attention has been paid to search for Majorana fermions in solid-state systems. Among various proposals there is one based on radio-frequency superconducting quantum…
Anomalous Cooper pair interference on Bi2Te3 surface
Jie Shen, Yue Ding, Yuan Pang +9
It is believed that the edges of a chiral p-wave superconductor host Majorana modes, relating to a mysterious type of fermions predicted seven decades ago. Much attention has been…
Strong Superconducting Proximity Effect in Pb-Bi2Te3 Hybrid Structures
Fanming Qu, Fan Yang, Jie Shen +8
Majarona fermions (MFs) were predicted more than seven decades ago but are yet to be identified [1]. Recently, much attention has been paid to search for MFs in condensed matter sy…
Tunable Surface Conductivity in Bi2Se3 Revealed in Diffusive Electron Transport
J. Chen, X. Y. He, K. H. Wu +5
We demonstrate that the weak antilocalization effect can serve as a convenient method for detecting decoupled surface transport in topological insulator thin films. In the regime w…
Aharonov-Casher effect in BiSe square-ring interferometers
Fanming Qu, Fan Yang, Jun Chen +11
Electrical control of spin dynamics in BiSe was investigated in ring-type interferometers. Aharonov-Bohm and Altshuler-Aronov-Spivak resistance oscillations aga…
Strong and Tunable Spin-Orbit Coupling of One-Dimensional Holes in Ge/Si Core/Shell Nanowires
Xiao-Jie Hao, Tao Tu, Gang Cao +7
We investigate the low-temperature magneto-transport properties of individual Ge/Si core/shell nanowires. Negative magneto-conductance was observed, which is a signature of one-dim…
Andreev reflection enhanced single hole tunneling in Ge/Si core/shell nanowire quantum dot
Xiao-Jie Hao, Guo-Ping Guo, Hai-Ou Li +7
We experimentally study the electrical transport properties of Ge/Si core/shell nanowire device with two superconducting leads in the Coulomb blockade regime. Anomalous zero field…
Quantum Noise, Effective Temperature, and Damping in a Superconducting Single-Electron Transistor
W. W. Xue, Z. Ji, Feng Pan +2
We have directly measured the quantum noise of a superconducting single-electron transistor (S-SET) embedded in a microwave resonator consisting of a superconducting LC tank circui…
On-Chip Matching Networks for Radio-Frequency Single-Electron-Transistors
W. W. Xue, Z. Ji, B. Davis +4
In this letter, we describe operation of a radio-frequency superconducting single electron transistor (RF-SSET) with an on-chip superconducting LC matching network consisting of a…
Shot-Noise-Limited Operation of a Fast Quantum-Point-Contact Charge Sensor
Madhu Thalakulam, W. W. Xue, Feng Pan +5
We have operated a quantum point contact (QPC) charge detector in a radio frequency (RF) mode that allows fast charge detection in a bandwidth of tens of megahertz. We find that th…
Sensitivity and Linearity of Superconducting Radio-Frequency Single-Electron Transistors: Effects of Quantum Charge Fluctuations
Madhu Thalakulam, Z. Ji, A. J. Rimberg
We have investigated the effects of quantum fluctuations of quasiparticles on the operation of superconducting radio-frequency single-electron transistors (RF-SETs) for large value…