Intervalley Scattering and Localization Behaviors of Spin-Valley Coupled Dirac Fermions

We study the quantum diffusive transport of multivalley massive Dirac cones, where time-reversal symmetry requires opposite spin orientations in inequivalent valleys. We show that the intervalley scattering and intravalley scattering can be distinguished from the quantum conductivity that corrects the semiclassical Drude conductivity, due to their distinct symmetries and localization trends. In immediate practice, it allows transport measurements to estimate the intervalley scattering rate in hole-doped monolayers of group-VI transition metal dichalcogenides (e.g., molybdenum dichalcogenides and tungsten dichalcogenides), an ideal class of materials for valleytronics applications. The results can be generalized to a large class of multivalley massive Dirac systems with spin-valley coupling and time-reversal symmetry.Comment: 5 pages+4 pages of supplemental materials, 4 figure

The Future Development Tendency of the International Financial Law from the Perspective of Financial Crisis

The global financial crisis triggered by the subprime mortgage crisis in America made a severe impact on the economies of the whole world including China. The paper analyzes the causes of the crisis, pointing out the deficiencies and insufficiency of the international laws today and offering constructive suggestions to its future development. The analysis of the causes of the crisis and the review of the neglects of the international financial laws in the paper are aimed to offer some suggestions to the reform and improvement of the international financial system in the future. Keywords: Financial crisis; international financial law; deficiency; tendency Résumé: La crise financière mondiale déclenchée par la crise des subprimes aux Etats-Unis a eu un impact sévère sur les économies du monde entier y compris la Chine. L'article analyse les causes de la crise, en soulignant les déficits et les insuffisance de la législation internationale actuelle et offre des suggestions constructives pour son développement futur. L'analyse des causes de la crise et la révision du manquement d'intérêt des lois financières internationales dans cet article ont pour but d'offrir quelques suggestions pour la réforme et l'amélioration du système financier international dans l'avenir.Mots-clés: crise financière; lois financières internationals; deficits; tendanc