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Showing 1–7 of 7 results
Advanced filters: Author: "S Horiuchi" Clear advanced filters

  • There are only a few known organic ferroelectrics, particularly ones that operate at high temperatures. Here the discovery of ferroelectricity above room temperature in members of an ubiquitous family of organic molecules reveals the possibility of novel low-cost electronic applications.

    • Sachio Horiuchi
    • Fumitaka Kagawa
    • Yoshinori Tokura
    ResearchOpen Access
    Nature Communications
    Volume: 3, P: 1-6

  • Ferroelectrics based on proton tautomerism are promising in low-field and above-roomtemperature operations. Here the authors establish a procedure to optimize spontaneous polarizations, finding that the polarization in croconic acid breaks its own record for organic systems.

    • Sachio Horiuchi
    • Kensuke Kobayashi
    • Shoji Ishibashi
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-9

  • Quantum critical behaviour emerges when quantum fluctuations perturb the balance between electronic states of a material having the same energy, and can lead to novel phenomena. Here, the authors discover quantum criticality in the ferroelectric behaviour of organic molecular solids.

    • Sachio Horiuchi
    • Kensuke Kobayashi
    • Yoshinori Tokura
    ResearchOpen Access
    Nature Communications
    Volume: 6, P: 1-7

  • Ferroelectrics are electro-active materials that can store and switch their polarity, sense temperature changes, interchange electric and mechanical functions, and manipulate light. Subtle changes in the topology of certain chemical bonds have long been identified as a possible route for achieving ferroelectricity in organic molecular crystals. Ferroelectricity above room temperature is now demonstrated by applying an electric field to coherently align the molecular polarities in crystalline croconic acid.

    • Sachio Horiuchi
    • Yusuke Tokunaga
    • Yoshinori Tokura
    Research
    Nature
    Volume: 463, P: 789-792

    • Sachio Horiuchi
    • Yoshinori Tokura
    Reviews
    Nature Materials
    Volume: 7, P: 357-366

  • Surfaces of cyclo-olefin polymers (COP) are photoactivated by vacuum ultraviolet (VUV) light and can be bonded with a practical bonding strength at low temperatures below Tg. We investigated the mechanism of the low-temperature bonding of COP by nanofractography using high-resolution scanning electron microscopy. It was indicated that the interfaces were fractured via pull out of the polymer chains connected at the interface by hydrogen bonding.

    • Shin Horiuchi
    • Hideki Hakukawa
    • Hiroyuki Sugimura
    Research
    Polymer Journal
    Volume: 48, P: 473-479