22 citations · 75 across the 12 of their papers we have counts for
12 papers
Spin splitting, Kondo correlation and singlet-doublet quantum phase transition in a superconductor-coupled InSb nanosheet quantum dot
Xingjun Wu, Ji-Yin Wang, Haitian Su +6
We realize a superconductor-coupled quantum dot (QD) in an InSb nanosheet, a 2D platform promising for studies of topological superconductivity. The device consists of a supercondu…
Tunable superconducting diode effect in higher-harmonic InSb nanosheet interferometers
Xingjun Wu, Ji-Yin Wang, Haitian Su +5
Superconducting diodes, characterized by the nonreciprocal supercurrent flow, have gained significant attention for their potential in dissipationless electronics. This study prese…
Gate-defined quantum point contacts in a germanium quantum well
Han Gao, Zhen-Zhen Kong, Po Zhang +6
We report an experimental study of quantum point contacts defined in a high-quality strained germanium quantum well with layered electric gates. At zero magnetic field, we observe…
Ubiquitous missing first Shapiro step in Al-InSb nanosheet Josephson junctions
Xingjun Wu, Haitian Su, Chuanchang Zeng +6
The absence of odd-order Shapiro steps is a predicted signature of topological superconductors. Experimentally, the missing first-order Shapiro step has been reported in both putat…
Microwave-assisted unidirectional superconductivity in Al-InAs nanowire-Al junctions under magnetic fields
Haitian Su, Ji-Yin Wang, Han Gao +10
Under certain symmetry-breaking conditions, a superconducting system exhibits asymmetric critical currents, dubbed the ``superconducting diode effect". Recently, systems with the i…
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…
Large Second-Order Josephson Effect in Planar Superconductor-Semiconductor Junctions
P. Zhang, A. Zarassi, L. Jarjat +12
We investigate the current-phase relations of Al/InAs-quantum well planar Josephson junctions fabricated using nanowire shadowing technique. Based on several experiments, we conclu…
Triple Andreev dot chains in semiconductor nanowires
Hao Wu, Po Zhang, John P. T. Stenger +6
Kitaev chain is a theoretical model of a one-dimensional topological superconductor with Majorana zero modes at the two ends of the chain. With the goal of emulating this model, we…
Evidence of Andreev blockade in a double quantum dot coupled to a superconductor
Po Zhang, Hao Wu, Jun Chen +4
We design and investigate an experimental system capable of entering an electron transport blockade regime in which a spin-triplet localized in the path of current is forbidden fro…
Theory of Andreev Blockade in a Double Quantum Dot with a Superconducting Lead
David Pekker, Po Zhang, Sergey M. Frolov
A normal metal source reservoir can load two electrons onto a double quantum dot in the spin-triplet configuration. We show that if the drain lead of the dot is a spin-singlet supe…
Thermopower and Nernst measurements in a half-filled lowest Landau level
Xiaoxue Liu, Tingxin Li, Po Zhang +4
Motivated by recent proposal by Potter et al. [Phys. Rev. X 6, 031026 (2016)] concerning possible thermoelectric signatures of Dirac composite fermions, we perform a systematic exp…
Composite Fermion States around 2D Hole Landau Level Filling Factor 3/2 in Tilted Magnetic Fields
Po Zhang, Ruiyuan Liu, Rui-Rui Du +2
Transport measurements under a tilted magnetic field were performed on a series of C-doped (001) AlGaAs/GaAs/AlGaAs two-dimensional hole samples. Due to a large g-factor, Zeeman en…