―133―Spin-orbit interaction (SOI) is important to the potential spintronics and has attracted significant interest these years. In III-V semiconductor quantum wells (QWs), SOI has two contributions, which are known as Rashba effect and Dresselhaus effect. the momentum dependence of these effective fields causes spin relaxation, which would limit the performance of spintronics devices when spin is used as an information carrier. One way to suppress the spin relaxation is designing material structures to achieve a special condition called persistent spin helix (PSH) state. The realization of PSH is essential by precisely evaluating SOI parameters. In our work, we measure the quantum correction of conductance in InGaAs (001) QWs. We demonstrate the control of PSH state by applying a top gate voltage. The measured results are fit by three different theoretic models and the full SOI coefficients near the PSH state in InGaAs (001) QW are evaluated. We believe our work will contribute for designing future spintronic devices and implementing quantum information. Polymer coating by cold spray is a complex process involving material science, polymer chemistry, fluid and solid mechanics, and so on. Understanding the particle history is primordial to have better insight of the particle deformation during cold spray process [1,2]. During their flight, particles are subjected to an important thermal gradient (~60 K) leading to a gradient of mechanical properties due to the temperature sensitive material properties. This result constitutes and upper limit of the thermal gradient as it assumes that the particle is spherical and does not change position during the flight. However, SEM images showed that polymer particles geometry is coarse. Therefore, during the impact, the particle position is more likely to change to enhance its hydrodynamics in the gas flux, as observed during the single micro-ballistic impact test. The mechanical behavior of two particles (UHMWPE and PFA) has been investigated throught micro-ballistic impact tests and particle micro-compression tests. During the particle deformation, evolution of the particle microstructure is observed. Thus, a decrease of the crystallinity is accompanied with an increase of the interphase (observations made after particle micro-compression tests). Spin-orbit Interaction Coefficients near the Persistent Helix State in Polymer coating by cold spray: a complex process Chrystelle Bernard (Device and Technology/Polymer material) References [1]C.A. Bernard, H. Takana, G. Diguet, K. Ravi, O. Lame, K. Ogawa, J.-Y. Cavaillé, Thermal gradientof in-flight polymer particles during cold spraying, Journal of Materials Processing Technology, 2020,286, 116805[2]C.A. Bernard, H. Takana, O. Lame, K. Ogawa, J.-Y. Cavaillé, Influence of the nozzle inner geometryon the particle history during cold spray process, Journal of Thermal Spray Technology, Accepted April2022InGaAs Quantum Well Chaoliang Zhang (Device and Technology)
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