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  1. 計算科学研究センター (Center for Computational Sciences)
  2. 小泉 裕康 (Koizumi Hiroyasu)
  1. コンテンツタイプ (Contents Type)
  2. 雑誌発表論文等 (Journal article, etc.)
  3. J~
  4. Journal of superconductivity and novel magnetism

Spin-vortex Superconductivity

http://hdl.handle.net/2241/113831
47b98741-4fee-4a52-b2cd-7e45ebb58195
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JSNM_24-6.pdf JSNM_24-6.pdf (777.6 kB)
item type Journal Article(1)
公開日 2011-09-05
タイトル
タイトル Spin-vortex Superconductivity
言語
言語 eng
資源タイプ
タイプ journal article
著者 Koizumi, Hiroyasu

× Koizumi, Hiroyasu

WEKO 87138

Koizumi, Hiroyasu

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著者別名 小泉, 裕康

× 小泉, 裕康

WEKO 204265
e-Rad 60240959
筑波大学研究者総覧 0000000777

小泉, 裕康

Search repository
抄録
内容記述 We present a theory of superconductivity based on the theoretical prediction that a macroscopic persistent current is generated by spin-vortices. It explains the origin of the phase variable θ that is canonical conjugate to the superfluid density as a Berry phase arising from the spin-vortex formation. This superconductivity does not require Cooper-pairs as charge carriers, thus, is not directly related to the standard theory based on the BCS one; however, it exhibits the flux quantization in the unit Φ 0=hc/2
抄録
内容記述 e
抄録
内容記述 , where h is Planck’s constant, c the speed of light, and e the electron charge; and the AC Josephson frequency, f J=2
抄録
内容記述 e
抄録
内容記述 V/h, where V is the voltage of the battery connected to the superconductor–insulator–superconductor junction. In due course, it is found that the standard derivation of the AC Josephson frequency misses a term arising from the flow of particles through the leads connected to the junction. If this contribution is included, the observed f J indicates that the phase θ is a variable conjugate to the number density of charge e carriers instead of the currently accepted charge 2e carriers. We propose an experiment that discriminates whether it is e or 2e. If the above claim is verified, it means that the BCS theory cannot predict whether a particular compound is a superconductor or not since it does not explain the origin of θ. A connection between the present mechanism and the BCS mechanism is discussed; the fact that the BCS theory gives an excellent estimate of T c is attributed to the fact that it predicts the temperature at which spin-vortices become long-lived due to the energy gap formation; since the stabilization by the electron-pair formation is compatible with the present mechanism, asymmetries observed in the even and odd number of electron systems are preserved. The most notable difference is that the persistent current generation is formulated in a strictly particle-number-conserving manner. Thus, it does not violate the superselection rule for the total charge.
書誌情報 Journal of superconductivity and novel magnetism

巻 24, 号 6, p. 1997-2011, 発行日 2011-08
ISSN
収録物識別子 1557-1939
書誌レコードID
収録物識別子 AA12092103
DOI
関連識別子
関連識別子 10.1007/s10948-011-1159-8
権利
権利情報 © The Author(s) 2011. This article is published with open access at Springerlink.com
著者版フラグ
値 publisher
出版者
出版者 Springer
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