Higgs mode in electric-field-induced superconductors

被引：1
作者：
Koyama, Tomio [1 ]
机构：
[1] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan
来源：
PHYSICAL REVIEW B | 2014年 / 90卷 / 06期
关键词：
CHARGE-DENSITY WAVES; 2-BAND SUPERCONDUCTORS; ORDER-PARAMETER; INSULATOR;
D O I：
10.1103/PhysRevB.90.064514
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We develop a theory for the Higgs (gap-amplitude) mode excitation in electric-field-induced (EFI) superconductors. The Higgs mode can be excited directly by an oscillating electric field in EFI superconductors since the gap value depends sensitively on the external electric field that induces superconducting carriers. The mass of the Higgs mode in EFI superconductors does not coincide with the threshold energy of pair-breaking two-particle excitations.
引用
收藏
页数：7
相关论文
共 16 条
  • [1] Synchronization in the BCS pairing dynamics as a critical phenomenon
    Barankov, R. A.
    Levitov, L. S.
    [J]. PHYSICAL REVIEW LETTERS, 2006, 96 (23)
  • [2] Amplitude or Higgs modes in d-wave superconductors
    Barlas, Yafis
    Varma, C. M.
    [J]. PHYSICAL REVIEW B, 2013, 87 (05):
  • [3] The 'Higgs' amplitude mode at the two-dimensional superfluid/Mott insulator transition
    Endres, Manuel
    Fukuhara, Takeshi
    Pekker, David
    Cheneau, Marc
    Schauss, Peter
    Gross, Christian
    Demler, Eugene
    Kuhr, Stefan
    Bloch, Immanuel
    [J]. NATURE, 2012, 487 (7408) : 454 - U64
  • [4] NUMBER-PHASE FLUCTUATIONS IN 2-BAND SUPERCONDUCTORS
    LEGGETT, AJ
    [J]. PROGRESS OF THEORETICAL PHYSICS, 1966, 36 (05): : 901 - &
  • [5] GAUGE-INVARIANT THEORY OF THE DYNAMICAL INTERACTION OF CHARGE-DENSITY WAVES AND SUPERCONDUCTIVITY
    LITTLEWOOD, PB
    VARMA, CM
    [J]. PHYSICAL REVIEW LETTERS, 1981, 47 (11) : 811 - 814
  • [6] Higgs Amplitude Mode in the BCS Superconductors Nb1-xTixN Induced by Terahertz Pulse Excitation
    Matsunaga, Ryusuke
    Hamada, Yuki I.
    Makise, Kazumasa
    Uzawa, Yoshinori
    Terai, Hirotaka
    Wang, Zhen
    Shimano, Ryo
    [J]. PHYSICAL REVIEW LETTERS, 2013, 111 (05)
  • [7] Nonequilibrium BCS State Dynamics Induced by Intense Terahertz Pulses in a Superconducting NbN Film
    Matsunaga, Ryusuke
    Shimano, Ryo
    [J]. PHYSICAL REVIEW LETTERS, 2012, 109 (18)
  • [8] Multiple-gap structure in electric-field-induced surface superconductivity
    Mizohata, Yousuke
    Ichioka, Masanori
    Machida, Kazushige
    [J]. PHYSICAL REVIEW B, 2013, 87 (01)
  • [9] Effective action approach to the Leggett's mode in two-band superconductors
    Sharapov, SC
    Gusynin, VP
    Beck, H
    [J]. EUROPEAN PHYSICAL JOURNAL B, 2002, 30 (01) : 45 - 51
  • [10] RAMAN-SCATTERING BY SUPERCONDUCTING-GAP EXCITATIONS AND THEIR COUPLING TO CHARGE-DENSITY WAVES
    SOORYAKUMAR, R
    KLEIN, MV
    [J]. PHYSICAL REVIEW LETTERS, 1980, 45 (08) : 660 - 662
12