Metastability and paramagnetism in superconducting mesoscopic disks

被引：109
作者：
Palacios, JJ [1 ]
机构：
[1] Univ Autonoma Madrid, Dept Fis Teor Mat Condensada, E-28049 Madrid, Spain
来源：
PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 08期
关键词：
D O I：
10.1103/PhysRevLett.84.1796
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A projected order parameter is used to calculate not only local minima of the Ginzburg-Landau energy functional but also saddle points or energy barriers responsible for the metastabilities observed in superconducting mesoscopic disks [A. K. Geim et al., Nature (London) 396, 144 (1998)]. We calculate the local minima magnetization and find the energetic instability points between vortex configurations with different vorticity. We also find that, for any vorticity, the supercurrent can reverse its flow direction on decreasing the magnetic field before one vortex can escape.
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页码：1796 / 1799
页数：4
相关论文
共 16 条
  • [1] Nucleation and growth of the normal phase in thin superconducting strips
    Aranson, I
    Shapiro, BY
    Vinokur, V
    [J]. PHYSICAL REVIEW LETTERS, 1996, 76 (01) : 142 - 145
  • [2] Observation of mesoscopic vortex physics using micromechanical oscillators
    Bolle, CA
    Aksyuk, V
    Pardo, F
    Gammel, PL
    Zeldov, E
    Bucher, E
    Boie, R
    Bishop, DJ
    Nelson, DR
    [J]. NATURE, 1999, 399 (6731) : 43 - 46
  • [3] Predicted signatures of rotating Bose-Einstein condensates
    Butts, DA
    Rokhsar, DS
    [J]. NATURE, 1999, 397 (6717) : 327 - 329
  • [4] Hysteresis in mesoscopic superconducting disks: The Bean-Livingston barrier
    Deo, PS
    Schweigert, VA
    Peeters, FM
    [J]. PHYSICAL REVIEW B, 1999, 59 (09) : 6039 - 6042
  • [5] Magnetization of mesoscopic superconducting disks
    Deo, PS
    Schweigert, VA
    Peeters, FM
    Geim, AK
    [J]. PHYSICAL REVIEW LETTERS, 1997, 79 (23) : 4653 - 4656
  • [6] Paramagnetic Meissner effect in small superconductors
    Geim, AK
    Dubonos, SV
    Lok, JGS
    Henini, M
    Maan, JC
    [J]. NATURE, 1998, 396 (6707) : 144 - 146
  • [7] Phase transitions in individual sub-micrometre superconductors
    Geim, AK
    Grigorieva, IV
    Dubonos, SV
    Lok, JGS
    Maan, JC
    Filippov, AE
    Peeters, FM
    [J]. NATURE, 1997, 390 (6657) : 259 - 262
  • [8] GEIM AK, UNPUB
  • [9] EFFECT OF SAMPLE TOPOLOGY ON THE CRITICAL FIELDS OF MESOSCOPIC SUPERCONDUCTORS
    MOSHCHALKOV, VV
    GIELEN, L
    STRUNK, C
    JONCKHEERE, R
    QIU, X
    VANHAESENDONCK, C
    BRUYNSERAEDE, Y
    [J]. NATURE, 1995, 373 (6512) : 319 - 322
  • [10] Paramagnetic Meissner effect from the self-consistent solution of the Ginzburg-Landau equations
    Moshchalkov, VV
    Qiu, XG
    Bruyndoncx, V
    [J]. PHYSICAL REVIEW B, 1997, 55 (17) : 11793 - 11801
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