Terahertz time-domain spectroscopy has been used to investigate terahertz conductivity and dielectric response of indium nitride ͑InN͒ nanorod array and epitaxial film. The complex terahertz conductivity of InN film is well fitted by the Drude model, while the negative imaginary conductivity of the InN nanorods can be described by using the Drude-Smith model. The electron mobility of the InN film is 1217± 58 cm 2 / V s, while that of the InN nanorods is 80± 5 cm 2 / V s. The reduced mobility of carriers for the latter can be attributed to the restricted carrier transport within the nanorods.

The non-equilibrium atmospheric-pressure parallel-plate helium dielectric barrier discharge (DBD) driven by a realistic 20 kHz distorted-sinusoidal voltage waveform has been investigated by means of simulations and experiments. A self-consistent onedimensional fluid modeling code considering the non-local electron energy balance was applied to simulate the helium DBD. The effect of selecting plasma chemistry was investigated by comparing simulations with experiments. The results show that the simulations, which include more excited helium, metastable helium and electron-ion-related reaction channels, can faithfully reproduce the measured discharged temporal current quantitatively. Based on the simulated discharge properties, we have found that there is complicated mode transition of discharges from the long Townsend-like to the ''dark current''-like, then to the short primary Townsend-like and the short secondary Townsend-like for the helium DBD that is driven by a realistic distorted-sinusoidal voltage power source. Discharge properties in different periods of discharge are discussed in detail in the paper.

The low-dimensional magnetic systems tend to reveal exotic spin liquid ground states or form peculiar types of long-range order. Among systems of vivid interest are those characterized by the triangular motif in two dimensions. The realization of either ordered or disordered ground state in triangular, honeycomb or kagome lattices is dictated by the competition of exchange interactions, also being sensitive to anisotropy and the spin value of magnetic ions. While the low-spin Heisenberg systems may arrive to a spin liquid long-range entangled quantum state with emergent gauge structures, the high-spin Ising systems may establish the rigid non-collinear structures. Here, we present the case of chiral non-coplanar inverted umbrella-type ferrimagnet formed in cobalt nitrate Co(NO 3 ) 2 below T C = 3 K with the comparable spin and orbital contributions to the total magnetic moment.

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The paper is introduced using to detect a critical small‐pixel‐sized defect and presents an efficiency flaw detection of medical displays application with ultra‐high‐resolution IGZO‐based thin‐film‐transistor array. It is a current electrical testing and detection method with advantages of small‐pixel sized, ultra‐high‐resolution and no contact damaged to the display array panel.

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