Hao Wu

Space Engineering University

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i-10 index

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Co-Authors

Sergey Frolov

University of Pittsburgh

Po Zhang

University of Pittsburgh

Erik P. A. M. Bakkers

Eindhoven University of Technology

Saša Gazibegović

Eindhoven University of Technology

Ghada Badawy

Eindhoven University of Technology

Moïra Hocevar

Institut polytechnique de Grenoble

C. J. Palmstrøm

University of California, Santa Barbara

Connor P. Dempsey

University of California, Santa Barbara

Jun Chen

Southwest Jiaotong University

Mihir Pendharkar

University of California, Santa Barbara

Cooperative Institutions

University of Pittsburgh

Space Engineering University

Eindhoven University of Technology

University of California, Santa Barbara

Chinese Academy of Sciences

Delft University of Technology

Tianjin University

Centre National de la Recherche Scientifique

National Cheng Kung University

Université Grenoble Alpes

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Data for "Parity-preserving and magnetic field-resilient superconductivity in InSb nanowires with Sn shells"

Zenodo (CERN European Organization for Nuclear Research) (2021)

Mihir Pendharkar Bing Zhang Hao Wu Azarin Zarassi Po Zhang

This is version 1. We add "Full Original Raw Data.zip" in version 2. Zip files:
Paper Figures.zip:
This zip file contains all datasets necessary for plotting the paper figures.
MTX datasets are named the same as corresponding figures.
DAT datasets (raw data) with a figure - filename map (Figure-rawdata map.xlsx).
Jupyter notebooks for interactive graphing. Data Summaries.zip:
Plotted extended data beyond paper figures, in ppt and measurement logs (laboratory notebooks) TEM.zip:
TEM results. Full Original Raw Data.zip:
Full Original Raw Data for each cooldown. See "Data Summaries.zip" for device information. See "Paper Figures.zip" for visualization. Data formats:
MTX:
A simple 2D/3D matrix format developed for Spyview (https://nsweb.tn.tudelft.nl/~gsteele/spyview/). DAT:
Original spreadsheet data. SET:
Instrument settings. PY:
Measurement scripts.

Parity (physics)

10.5281/zenodo.4457486

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Citations (0)

Fermionic spectrum of superfluid phases of 3 He under strong confinement

Bulletin of the American Physical Society (2014)

J. A. Sauls Hao Wu

Source

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Citations (0)

Single-shot spatial instability and electric control of polariton condensates at room temperature

Physical review. B./Physical review. B (2023)

Ying Gao Xuekai Ma Xiaokun Zhai Chunzi Xing Meini Gao

In planar microcavities, the transverse-electric and transverse-magnetic (TE-TM) mode splitting of cavity photons can result in optical spin-orbit coupling (SOC). In this work, we find that in a liquid crystal (LC) microcavity filled with perovskite microplates, the pronounced TE-TM splitting gives rise to a strong SOC that leads to the spatial instability of microcavity polariton condensates under single-shot excitation. Spatially varying hole burning occurs between polarization components leading to different condensate profiles from shot to shot. The single-shot polariton condensates become stable when the SOC vanishes as the TE and TM modes are spectrally well separated from each other, which can be achieved by application of an electric field to our LC microcavity with electrically tunable anisotropy. Our findings are well reproduced and traced back to their physical origin by our detailed numerical simulations. With the electrical manipulation our work reveals how the shot-to-shot spatial instability of spatial polariton profiles can be engineered in anisotropic microcavities at room temperature, which will benefit the development of stable polariton-based optoeletronic and light-emitting devices.

10.1103/physrevb.108.205303

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Citations (1)

Kitaev model with quantum dot chains II: zero bias peaks

Bulletin of the American Physical Society (2017)

Hao Wu Zhaoen Su Moïra Hocevar Diana Car Sébastien Plissard

Zero (linguistics)

Source

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Epitaxy of Spinel Zn<sub>2</sub>TiO<sub>4</sub> (111) on GaN (001) for MOS Application

Extended Abstracts of the 2020 International Conference on Solid State Devices and Materials (2011)

S. W. Fu Jianzhi Wu C. Y. Hsiao K. T. Hung S. H. Wu

Zinc compounds

10.7567/ssdm.2011.m-2-4

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Data for "Parity-preserving and magnetic field-resilient superconductivity in InSb nanowires with Sn shells"

Zenodo (CERN European Organization for Nuclear Research) (2021)

Mihir Pendharkar Bing Zhang Hao Wu A. Zarassi Po Zhang

Zip files:
Paper Figures.zip:
This zip file contains all datasets necessary for plotting the paper figures.
MTX datasets are named the same as corresponding figures.
DAT datasets (raw data) with a figure - filename map (Figure-rawdata map.xlsx).
Jupyter notebooks for interactive graphing. Data Summaries.zip:
Plotted extended data beyond paper figures, in ppt and measurement logs (laboratory notebooks) TEM.zip:
TEM results. Full Original Raw Data.zip:
Full Original Raw Data for each cooldown. See "Data Summaries.zip" for device information. See "Paper Figures.zip" for visualization. Data formats:
MTX:
A simple 2D/3D matrix format developed for Spyview (https://nsweb.tn.tudelft.nl/~gsteele/spyview/). DAT:
Original spreadsheet data. SET:
Instrument settings. PY:
Measurement scripts.

Parity (physics)

10.5281/zenodo.4466265

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Citations (0)

Signatures of Andreev Blockade in a Double Quantum Dot Coupled to a Superconductor

Physical Review Letters (2022)

Po Zhang Hao Wu Jun Chen Sabbir A. Khan Peter Krogstrup

We investigate an electron transport blockade regime in which a spin triplet localized in the path of current is forbidden from entering a spin-singlet superconductor. To stabilize the triplet, a double quantum dot is created electrostatically near a superconducting Al lead in an InAs nanowire. The quantum dot closest to the normal lead exhibits Coulomb diamonds, and the dot closest to the superconducting lead exhibits Andreev bound states and an induced gap. The experimental observations compare favorably to a theoretical model of Andreev blockade, named so because the triplet double dot configuration suppresses Andreev reflections. Observed leakage currents can be accounted for by finite temperature. We observe the predicted quadruple level degeneracy points of high current and a periodic conductance pattern controlled by the occupation of the normal dot. Even-odd transport asymmetry is lifted with increased temperature and magnetic field. This blockade phenomenon can be used to study spin structure of superconductors. It may also find utility in quantum computing devices that use Andreev or Majorana states.

Andreev reflection

Coulomb blockade

10.1103/physrevlett.128.046801

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Citations (17)

Asymmetric vortex dynamics in two-dimensional Bose–Einstein condensate with harmonic trap potential

AIP Advances (2022)

Chenghao Li Zhengliang Liu Yuan Ren Ying Wang Hao Wu

Based on the two-dimensional Gross–Pitaevskii equation model, we investigated the asymmetric vortex evolution of two-dimensional Bose–Einstein condensates in a harmonic potential trap with polar direction perturbation. This corresponds to the generation of an asymmetric vortex evolution mode under initial vortex light manipulation together with polar direction perturbation. Unlike most of the prior work on this topic that uses a pure numerical method for the system under study, we use an exact analytical method rather than numerical simulation to investigate the key features of the system evolution dynamics in this study. Based on the variational method, and for different system parameter settings including the strength of the harmonic oscillator potential and the nonlinear interaction, we derived two evolution modes, namely, the periodic evolution oscillation mode and the monotonic decay mode, and pictorially demonstrated the evolution patterns of the system. In addition, we investigated the scenario when the system is in the rotating state, which corresponds to the action of the quadratic centrifugal potential. Notably, we also identified the damping effects for the two modes with increasing angular velocity, whose upper limit value corresponds to the constant vortex pattern of the system. Our theoretical results can be used to guide the experimental investigation of asymmetric vortex evolution in two-dimensional Bose–Einstein condensates.

Time evolution

Gross–Pitaevskii equation

Oscillation (cell signaling)

10.1063/5.0108838

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Data and code for "Evidence of Andreev blockade in a double quantum dot coupled to a superconductor"

Zenodo (CERN European Organization for Nuclear Research) (2021)

Po Zhang Hao Wu Jun Chen Sabbir A. Khan Peter Krogstrup

Zip files:
Paper Figures.zip:
This zip file contains datasets and code necessary for generating paper figures.
MTX datasets are in folders named after paper figures.
DAT datasets are in "Original Raw Data.zip".
"Main.ipynb" and "Supplementary.ipynb" are Jupyter notebooks generating main and supplementary figures. "Interactive Figure Examples.ipynb" shows examples of interactive graphing with the data. Data Summaries.zip:
Plotted extended data beyond paper figures (in PPT) and measurement logs (in DOC). Simulation.zip:
Simulation code and results. Full Original Raw Data.zip:
Full Original Raw Data for all devices in "Data Summaries.zip". See "Data Summaries.zip" for device information. See "Paper Figures.zip" for data visualization code. Data formats:
MTX:
A simple 2D/3D matrix format developed for Spyview (https://nsweb.tn.tudelft.nl/~gsteele/spyview/). DAT:
Original plain-text tabular data. SET:
Instrument settings. PY:
Measurement scripts.

Andreev reflection

Code (set theory)

10.5281/zenodo.4446185

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Sn/InAs Josephson Junctions on Selective Area Grown Nanowires with in Situ Shadowed Superconductor Evaporation

Nano Letters (2023)

Aranya Goswami Sanchayeta R. Mudi Connor P. Dempsey Po Zhang Hao Wu

Superconductor-semiconductor nanowire hybrid structures are useful in fabricating devices for quantum information processing. While selective area growth (SAG) offers the flexibility to grow semiconductor nanowires in arbitrary geometries, in situ evaporation of superconductors ensures pristine superconductor-semiconductor interfaces, resulting in strong induced superconductivity in the semiconducting nanowire. In this work, we used high-aspect-ratio SiOx dielectric walls to in situ evaporate islands of superconductor tin on in-plane InAs SAG nanowires. Our technique enables customization in the designs of such hybrid nanostructures, while simultaneously performing the nanowire and superconductor growth without breaking vacuum. Using this technique, we grew super(S)-normal(N)-super(S), NS, and SNSNS junctions. We performed cryogenic electron transport measurements revealing the presence of gate and field tunable supercurrents. We further measured the superconducting gap and critical fields in the hybrid nanostructures and the crossover from 2e to 1e periodicity in the SNSNS junctions as a proof of the usability of these hybrid nanostructures.

10.1021/acs.nanolett.3c01320

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Citations (5)