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Showing 1–6 of 6 results
Advanced filters: Author: Joe Sakai Clear advanced filters

  • Thermal effects limit the speed of the electrically driven insulator-metal transition in V2O3 to tens of picoseconds. Here the authors show that under an intense THz-electric-field excitation the thermal regime can be overcome, achieving a purely electronic transition on ultrafast timescales.

    • Flavio Giorgianni
    • Joe Sakai
    • Stefano Lupi
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-6

  • Climate warming increases evapotranspiration (ET) more in boreal peatlands than in forests. Observations show that peatland ET can exceed forest ET by up to 30%, indicating a stronger warming response in peatlands. Earth system models do not fully account for peatlands and hence may underestimate future boreal ET.

    • Manuel Helbig
    • James Michael Waddington
    • Vyacheslav Zyrianov
    Research
    Nature Climate Change
    Volume: 10, P: 555-560

  • A total of 1074 patients with a history of ischemic stroke enrolled in The Recurrent Stroke Prevention Clinical Outcome (RESPECT) Study were assigned to intensive blood pressure (BP) control group (blood pressure < 120/80 mmHg) or standard blood pressure control group (blood pressure < 140/90 mmHg) and were followed up for a mean of 3.9 years. Seventy-eight first recurrent strokes occurred, including 70 ischemic stroke and 8 intracerebral hemorrhage. Intensive treatment did not change annual risk of ischemic stroke (1.74% vs. 1.75%, P = 0.999), but markedly reduced risk of hemorrhagic stroke (0.00% vs. 0.39%, P = 0.005). Beneficial effect of intensive BP control were observed for risk of hemorrhagic stroke in the patients with a history of ischemic stroke.

    • Kazuo Kitagawa
    • Hisatomi Arima
    • Seigo Nakada
    Research
    Hypertension Research
    Volume: 45, P: 591-601

  • The use of intense light to control transient properties of quantum materials is a subject of current interest in ultrafast condensed matter physics. Here, a new up-conversion pathway for the optical control of Raman-active modes is demonstrated via a terahertz field-driven nonlinear process in the strongly-correlated metal, V2O3.

    • Flavio Giorgianni
    • Mattia Udina
    • Steven Lee Johnson
    ResearchOpen Access
    Communications Physics
    Volume: 5, P: 1-7