Signature of high T c above 25 K in high quality superconducting diamond

Hiroyuki Okazaki, Takanori Wakita, Takayuki Muro, Tetsuya Nakamura, Yuji Muraoka, Takayoshi Yokoya, Shin Ichiro Kurihara, Hiroshi Kawarada, Tamio Oguchi, Yoshihiko Takano

    Research output: Contribution to journalArticle

    28 Citations (Scopus)

    Abstract

    We have observed zero resistivity above 10 K and an onset of resistivity reduction at 25.2 K in a heavily B-doped diamond film. However, the effective carrier concentration is similar to that of superconducting diamond with a lower Tc. We found that the carrier has a longer mean free path and lifetime than in the previous report, indicating that this highest Tc diamond has better crystallinity compared to that of other superconducting diamond films. In addition, the susceptibility shows a small transition above 20 K in the high quality diamond, suggesting a signature of superconductivity above 20 K. These results strongly suggest that heavier carrier doped defect-free crystalline diamond could give rise to high Tc diamond.

    Original languageEnglish
    Article number052601
    JournalApplied Physics Letters
    Volume106
    Issue number5
    DOIs
    Publication statusPublished - 2015 Feb 2

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    diamonds
    signatures
    diamond films
    electrical resistivity
    mean free path
    crystallinity
    superconductivity
    magnetic permeability
    life (durability)
    defects

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Cite this

    Okazaki, H., Wakita, T., Muro, T., Nakamura, T., Muraoka, Y., Yokoya, T., ... Takano, Y. (2015). Signature of high T c above 25 K in high quality superconducting diamond. Applied Physics Letters, 106(5), [052601]. https://doi.org/10.1063/1.4907411

    Signature of high T c above 25 K in high quality superconducting diamond. / Okazaki, Hiroyuki; Wakita, Takanori; Muro, Takayuki; Nakamura, Tetsuya; Muraoka, Yuji; Yokoya, Takayoshi; Kurihara, Shin Ichiro; Kawarada, Hiroshi; Oguchi, Tamio; Takano, Yoshihiko.

    In: Applied Physics Letters, Vol. 106, No. 5, 052601, 02.02.2015.

    Research output: Contribution to journalArticle

    Okazaki, H, Wakita, T, Muro, T, Nakamura, T, Muraoka, Y, Yokoya, T, Kurihara, SI, Kawarada, H, Oguchi, T & Takano, Y 2015, 'Signature of high T c above 25 K in high quality superconducting diamond', Applied Physics Letters, vol. 106, no. 5, 052601. https://doi.org/10.1063/1.4907411
    Okazaki H, Wakita T, Muro T, Nakamura T, Muraoka Y, Yokoya T et al. Signature of high T c above 25 K in high quality superconducting diamond. Applied Physics Letters. 2015 Feb 2;106(5). 052601. https://doi.org/10.1063/1.4907411
    Okazaki, Hiroyuki ; Wakita, Takanori ; Muro, Takayuki ; Nakamura, Tetsuya ; Muraoka, Yuji ; Yokoya, Takayoshi ; Kurihara, Shin Ichiro ; Kawarada, Hiroshi ; Oguchi, Tamio ; Takano, Yoshihiko. / Signature of high T c above 25 K in high quality superconducting diamond. In: Applied Physics Letters. 2015 ; Vol. 106, No. 5.
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