Stanford Advisors

All Publications

  • Transonic dislocation propagation in diamond. Science (New York, N.Y.) Katagiri, K., Pikuz, T., Fang, L., Albertazzi, B., Egashira, S., Inubushi, Y., Kamimura, G., Kodama, R., Koenig, M., Kozioziemski, B., Masaoka, G., Miyanishi, K., Nakamura, H., Ota, M., Rigon, G., Sakawa, Y., Sano, T., Schoofs, F., Smith, Z. J., Sueda, K., Togashi, T., Vinci, T., Wang, Y., Yabashi, M., Yabuuchi, T., Dresselhaus-Marais, L. E., Ozaki, N. 2023; 382 (6666): 69-72


    The motion of line defects (dislocations) has been studied for more than 60 years, but the maximum speed at which they can move is unresolved. Recent models and atomistic simulations predict the existence of a limiting velocity of dislocation motion between the transonic and subsonic ranges at which the self-energy of dislocation diverges, though they do not deny the possibility of the transonic dislocations. We used femtosecond x-ray radiography to track ultrafast dislocation motion in shock-compressed single-crystal diamond. By visualizing stacking faults extending faster than the slowest sound wave speed of diamond, we show the evidence of partial dislocations at their leading edge moving transonically. Understanding the upper limit of dislocation mobility in crystals is essential to accurately model, predict, and control the mechanical properties of materials under extreme conditions.

    View details for DOI 10.1126/science.adh5563

    View details for PubMedID 37796999