Kai Liu

ORCID: 0009-0003-3571-2534
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About
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Research Areas
  • ZnO doping and properties
  • Advanced Condensed Matter Physics
  • Magnetic and transport properties of perovskites and related materials
  • Gas Sensing Nanomaterials and Sensors
  • Ga2O3 and related materials
  • Heusler alloys: electronic and magnetic properties
  • Chalcogenide Semiconductor Thin Films
  • Rare-earth and actinide compounds
  • Quantum Dots Synthesis And Properties
  • Ship Hydrodynamics and Maneuverability
  • Maritime Navigation and Safety
  • Adaptive Control of Nonlinear Systems
  • Iron-based superconductors research
  • Magnetic properties of thin films
  • Multiferroics and related materials

Chinese Academy of Sciences
2006-2025

University of Chinese Academy of Sciences
2024-2025

Shenyang Institute of Automation
2024-2025

University of Science and Technology of China
2023

Hefei National Center for Physical Sciences at Nanoscale
2023

Changchun Institute of Optics, Fine Mechanics and Physics
2006-2014

High Mg content mixed-phase Zn0.38Mg0.62O was deposited on a-face sapphire by plasma-assisted molecular beam epitaxy, based which a metal-semiconductor-metal solar-blind ultraviolet (UV) photodetector fabricated. The dark current is only 0.25 pA at 5 V, much lower than that of the reported ZnMgO photodetectors. More interestingly, different from other photodetectors containing two photoresponse bands, this device shows one response peak and its −3 dB cut-off wavelength around 275 nm. At 10...

10.1063/1.4889914 article EN Applied Physics Letters 2014-07-07

This study examines the position-keeping control for unmanned sailboats. First, maximum speed and heading joint control, based on nonlinear model predictive is proposed as underlying maintaining position. On this basis, four strategies are proposed: straight-line trajectory strategy; circular surround square strategy, with diagonal-to-wind angle near expected position set to half navigation dead zone angle; predicted zero. Subsequently, simulation hierarchical analyses were conducted assess...

10.3390/jmse13040668 article EN cc-by Journal of Marine Science and Engineering 2025-03-26

Zn 0.76 Mg 0.24 O p-n photodiode was fabricated on (000l) Al2O3 substrate by plasma-assisted molecular beam epitaxy. Ni∕Au and In metals deposited using vacuum evaporation were used as p-type n-type contacts, respectively. Current-voltage measurements the device showed weak rectifying behavior. The photodetectors exhibited a peak responsivity at around 325nm. ultraviolet-visible rejection ratio (R325nm∕R400nm) of four orders magnitude obtained 6V bias. photodetector fast photoresponse with...

10.1063/1.2805816 article EN Applied Physics Letters 2007-11-12

The optical and electrical properties of FeSe thin films are studied by both absorption Hall measurements, which suggest that ferromagnetic is a metal instead semiconductor. No gap observed in the whole spectrum range from far infrared to ultraviolet. Temperature dependent transport measurement indicates has resistivity about 10−3Ωcm. It also found there transition n-type conductivity at low temperatures p-type higher FeSe, attributed two-carrier nature thermal activation localized carriers film.

10.1063/1.2712497 article EN Applied Physics Letters 2007-03-12

Cd 1 − x Fe S thin films with different contents were grown on c-plane sapphire by low-pressure metal organic chemical vapor deposition. The resistivity of the was found to increase addition more into Cd1−xFexS elevating growth temperature, which attributed ionization holes from trivalent ions. High density doping eventually reversed conductivity film n p type. With increasing content, band-to-band transition at 2.5eV suppressed while emission donor-acceptor pairs 2.0–2.4eV finally dominated...

10.1063/1.2425028 article EN Applied Physics Letters 2006-12-25

Abstract The electronic structure of constituent layers and the spin channel propagating electrons are critical factors that affect magnitude sign magnetoresistance (MR) in synthetic antiferromagnets (SAFMs), which important for spintronic applications. However, all‐oxide‐based SAFMs, where there is strong coupling between multiple degrees freedom, transport becomes more complex remains elusive. Here, using ultrathin half‐metallic manganite/doped ruthenate SAFMs as a model system, three...

10.1002/adfm.202303492 article EN Advanced Functional Materials 2023-07-12

This study proposes a trajectory tracking approach for unmanned sailboats that integrates velocity and heading control using nonlinear model predictive (NMPC). Unlike conventional methods, which typically rely on separate strategies maximum heading, this employs joint framework based NMPC. allows constrained control, ensuring the sailboat operates safely at desired velocity, forming foundation tracking. The strategy, built of is further categorized into upwind non-upwind wind direction. For...

10.3390/jmse13010015 article EN cc-by Journal of Marine Science and Engineering 2024-12-26

As a prototypical half-metallic ferromagnet, La 0.67 Sr 0.33 MnO 3 (LSMO) has been extensively studied due to its versatile physical properties and great potential in spintronic applications. However, the weak perpendicular magnetic anisotropy (PMA) limits controllability detection of magnetism LSMO, thus hindering realization oxide-based devices with low energy consumption high integration level. Motivated by this challenge, we develop an experimental approach enhance PMA LSMO epitaxial...

10.1088/0256-307x/40/7/077501 article EN Chinese Physics Letters 2023-06-01

As a prototypical half-metallic ferromagnet, La0.67Sr0.33MnO3 (LSMO) has been extensively studied due to its versatile physical properties and great potential in spintronic applications. However, the weak perpendicular magnetic anisotropy (PMA) limits controllability detection of magnetism LSMO, thus hindering realization oxide-based devices with low energy consumption high integration level. Motivated by this challenge, we develop an experimental approach enhance PMA LSMO epitaxial films....

10.48550/arxiv.2307.13881 preprint EN other-oa arXiv (Cornell University) 2023-01-01
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