Topology and strong electron correlations are crucial ingredients in emerging quantum materials, yet their intersection in experimental systems has been relatively limited to date. Strongly correlated Weyl semimetals, particularly when magnetism is incorporated, offer a unique and fertile platform to explore emergent phenomena in novel topological matter and topological spintronics. The antiferromagnetic Weyl semimetal Mn3Sn exhibits many exotic physical properties such as a large spontaneous Hall effect and has recently attracted intense interest. In this work, we report synthesis of epitaxial Mn3+xSn1−x films with greatly extended compositional range in comparison with that of bulk samples. As Sn atoms are replaced by magnetic Mn atoms, the Kondo effect, which is a celebrated example of strong correlations, emerges, develops coherence, and induces a hybridization energy gap. The magnetic doping and gap opening lead to rich extraordinary properties, as exemplified by the prominent DC Hall effects and resonance-enhanced terahertz Faraday rotation.

When surface states (SSs) form in topological insulators (TIs), they inherit the properties of bulk bands, including the electron–hole (e–h) asymmetry but with much more profound impacts. Here via combining magneto-infrared spectroscopy with theoretical analysis, we show that e–h asymmetry significantly modifies the SS electronic structures when interplaying with the quantum confinement effect. Compared with the case without e–h asymmetry, the SSs now bear not only a band asymmetry, such as that in the bulk, but also a shift of the Dirac point relative to the bulk bands and a reduction of the hybridization gap of up to 70%. Our results signify the importance of e–h asymmetry in the band engineering of TIs in the thin-film limit.

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Most of the traffic rules are originated in some historical reasons; it is difficult to say which is better than others. This paper proposed a monetizing evaluation model for highway transportation, which is based on the cellular automation (CA), more specifically, the NaSch model. We evaluated the Keep-Right rule, as an example, with the proposed model, and proposed some new rules according to the results. The fact that these rules are actually promoted in most countries proved that the evaluation model we proposed is objective and effective.

Internet of things (IOT) has b most promising technology of the 21th paper, we combine the WIFI and global communication (GSM) and build a dis system supporting standard commands f instruments (SCPI), in which the WIFI is u local communicating network; the GSM distance communication, and the comman based on the SCPI. The presented syste used, such as in domain of smart home monitor. It also provides a reference for re

Abstract-Aiming at the low voltage, high current and low voltage ripple demand of 100G DSP, this paper presents a power design using LTM4650 as the core device. Analyzing the causes and influencing factors of voltage ripple, a solution that used multi-phase parallel and the low ESR capacitor was applied, to suppress the voltage ripple. The results of LTspice simulation software and the actual circuit test, proved that the power design can meet the power requirements of 100G DSP and is able to guarantee the stability of the DSP system.

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