セミナー案内

日時
7月29日 (水), 13:30-
場所
Zoom Online Seminar
(URLはwatanabe.hikaru.43n[アット]st.kyoto-u.ac.jpまでお問い合わせください。)
講演者
Mr. Tomohiro Hisamitsu
(Condensed Matter Theory Group)
タイトル
"Analog of Anderson theorem for p-wave superfluid 3He in Aerogel"
※日本語での講演(seminar in Japanese)
備考欄 (アブストラクト等)

Abstract:
Recently, one analog of the Anderson’s theorem [2,3] for the s-wave superconductor has attracted much interest in the context of the p-wave polar pairing state [6] of superfluid 3 He in a model aerogel in the limit of strong uniaxial anisotropy [5]. We discuss to what extent the theorem is satisfied in the polar phase in real aerogels by examining the normal to polar transition temperature Tc and the low temperature behavior [4] of the superfluid energy gap under an anisotropy of a moderate strength and comparing the obtained results with experimental data. The situation in which Anderson’s theorem clearly breaks down is briefly discussed.

Reference:
[1] T. Hisamitsu, M. Tange, and R. Ikeda, Phys. Rev. B 101, 100502 (2020).
[2] I. A. Fomin, J. Exp. Theor. Phys. 127, 933 (2018).
[3] P. W. Anderson, J. Phys. Chem. Sol. 11, 26 (1959).
[4] V. B. Eltsov, T. Kamppinen, J. Rysti, and G. E. Volovik, arXiv:1908.01645.
[5] V. V. Dmitriev, A. A. Senin, A. A. Soldatov, and A. N. Yudin, Phys. Rev. Lett. 115, 165304 (2015).
[6] K. Aoyama and R. Ikeda, Phys. Rev. B 73, 060504(R) (2006).