Physics of Spin-Triplet Superconductivity

自旋三重态超导物理学

基本信息

  • 批准号:
    13852004
  • 负责人:
  • 金额:
    $ 76.13万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (S)
  • 财政年份:
    2001
  • 资助国家:
    日本
  • 起止时间:
    2001 至 2005
  • 项目状态:
    已结题

项目摘要

We firmly established for the first time that a superconductor with its electrons paired in a spin-triplet state actually exists. Through extensive investigations focusing on the ruthenate superconductor Sr_2RuO_4,we obtained a number of new key concepts in the study of superconductivity :(1) Determination of the superconducting multi-gaps : We devised a method of determining the superconducting gap on each of the Fermi surface. For Sr_2RuO_4,we understand the physical origin of its multi-gap structure based on the spin-triplet symmetry and the spin fluctuations.(2) Determination of the Cooper-pair spin state : By nuclear magnetic resonance (NMR), we determined that the triplet spins lie in the RuO_2 plane, but that they can be rotated by weak magnetic fields.(3) Confirmation of odd parity : We fabricated a pi-junction SQUID (Superconducting QUantum Interference Device) consisting of Sr_2RuO_4 and an s-wave superconductor AuIn, and demonstrated that the parity of the superconducting wave function of Sr_2RuO_4 is odd, a requirement for the spin-triplet superconductivity.(4) Construction of the theoretical framework of superconducting mechanisms : We have succeeded in constructing a general theoretical framework of superconducting mechanism based on Coulomb repulsion among the strongly correlated electrons. By applying it to a detailed realistic model of Sr_2RuO_4,we are able to derive that the spin-triplet pairing is more stable than other states.We also discovered superconductivity in silver-lead oxide, Ag_5Pb_2O_6,clarified the mechanism of the Mott transition and orbital ordering in (Ca,Sr)_2RuO_4,and revealed the metamagnetic quantum critical phenomenon in Sr_3Ru_2O_7. We sponsored the international symposium on "Spin-Triplet Superconductivity and Ruthenate Physics", attended by most of the active researchers in this field, including over 20 researches from 8 abroad.
我们第一次坚定地证明,电子成对的自旋三重态超导体确实存在。通过对Ruthenate超导体Sr2RuO4的广泛研究,我们得到了超导电性研究中的一些新的关键概念:(1)超导多能隙的确定:我们设计了一种确定每个费米面上的超导能隙的方法。对于Sr2RuO4,我们从自旋三重态对称性和自旋涨落的角度来理解其多能隙结构的物理起源。(2)库珀对自旋态的确定:通过核磁共振,我们确定了三重态自旋位于RuO2面上,但它们可以被弱磁场旋转。(3)奇宇称的确认:我们制作了由Sr2RuO4和S波超导体AuIn组成的pi结SQUID(超导量子干涉器件),并证明了Sr2RuO4超导波函数的宇称是奇的。对自旋三重态超导电性的要求。(4)超导机制理论框架的构建:我们成功地构建了一个基于强关联电子间库仑排斥的超导机制的一般理论框架。我们还发现了Ag_5Pb_2O_6的超导电性,阐明了(Ca,Sr)_2RuO_4的Mott转变和轨道有序化的机制,揭示了Sr_3Ru_2O_7的亚磁量子临界现象。我们主办了“自旋-三重态超导和Ruthenate物理”的国际研讨会,包括来自国外的20多个研究人员参加了会议。

项目成果

期刊论文数量(131)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Low-Temperature Hall Effect in Substituted Sr_2RuO_4
取代Sr_2RuO_4的低温霍尔效应
  • DOI:
  • 发表时间:
    2004
  • 期刊:
  • 影响因子:
    0
  • 作者:
    K.Deguchi;Z.Q.Mao;H.Yaguchi;Y.Maeno;T.Waki et al.;Yonezawa et al.;N.Kikugawa et al.
  • 通讯作者:
    N.Kikugawa et al.
Band-Selective Modification of the Magnetic Fluctuations in Sr_2RuO_4: A Study of Substitution Effects
Sr_2RuO_4磁涨落的能带选择性修饰:替代效应的研究
  • DOI:
  • 发表时间:
    2004
  • 期刊:
  • 影响因子:
    0
  • 作者:
    K.Deguchi;Z.Q.Mao;H.Yaguchi;Y.Maeno;T.Waki et al.;Yonezawa et al.;N.Kikugawa et al.;S.A.Grigera et al.;T.T.Tran et al.;N.Kikugawa et al.
  • 通讯作者:
    N.Kikugawa et al.
Toward Nano-Fabrication of Superconducting Ruthenate Qubits
超导钌酸盐量子位的纳米制造
  • DOI:
  • 发表时间:
    2004
  • 期刊:
  • 影响因子:
    0
  • 作者:
    K.Deguchi;Z.Q.Mao;H.Yaguchi;Y.Maeno;T.Waki et al.;Yonezawa et al.;N.Kikugawa et al.;S.A.Grigera et al.;T.T.Tran et al.;N.Kikugawa et al.;R.Higashinaka et al.;O.Sakai et al.;H.Murakawa et al.;O.Friedt et al.;R.S.Perry et al.;K.S.Wood et al.
  • 通讯作者:
    K.S.Wood et al.
Anomalous Josephson Network in the Ru-Sr_2RuO_4 Eutectic System
Ru-Sr_2RuO_4共晶体系中的反常约瑟夫森网络
  • DOI:
  • 发表时间:
    2004
  • 期刊:
  • 影响因子:
    0
  • 作者:
    K.Deguchi;Z.Q.Mao;H.Yaguchi;Y.Maeno;T.Waki et al.;Yonezawa et al.;N.Kikugawa et al.;S.A.Grigera et al.;T.T.Tran et al.;N.Kikugawa et al.;R.Higashinaka et al.;O.Sakai et al.;H.Murakawa et al.;O.Friedt et al.;R.S.Perry et al.;K.S.Wood et al.;H.Yaguchi et al.;J.S.Lee et al.;N.Kikugawa et al.;N.Hiraoka et al.;J.Hooper et al.
  • 通讯作者:
    J.Hooper et al.
Metamagnetism in Ca_<2-x>Sr_xRuO_4 in the Verge of the Mott Transition Sr_3Ru_2O_7
莫特跃迁Sr_3Ru_2O_7边缘Ca_<2-x>Sr_xRuO_4的超磁性
  • DOI:
  • 发表时间:
    2004
  • 期刊:
  • 影响因子:
    0
  • 作者:
    K.Deguchi;Z.Q.Mao;H.Yaguchi;Y.Maeno;T.Waki et al.;Yonezawa et al.;N.Kikugawa et al.;S.A.Grigera et al.;T.T.Tran et al.;N.Kikugawa et al.;R.Higashinaka et al.;O.Sakai et al.;H.Murakawa et al.;O.Friedt et al.;R.S.Perry et al.;K.S.Wood et al.;H.Yaguchi et al.;J.S.Lee et al.;N.Kikugawa et al.;N.Hiraoka et al.;J.Hooper et al.;J.Hooper et al.;Y.M.Jana et al.;K.Deguchi et al.;R.A.Borzi et al.;T.Mizokawa et al.;L.Balicas et al.
  • 通讯作者:
    L.Balicas et al.
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MAENO Yoshiteru其他文献

MAENO Yoshiteru的其他文献

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{{ truncateString('MAENO Yoshiteru', 18)}}的其他基金

DC Electric Field and Current: Novel Control Parameters for Strongly Correlated Electron Systems
直流电场和电流:强相关电子系统的新颖控制参数
  • 批准号:
    17H06136
  • 财政年份:
    2017
  • 资助金额:
    $ 76.13万
  • 项目类别:
    Grant-in-Aid for Scientific Research (S)
Control of the Mott transition by uniaxial pressure
通过单轴压力控制莫特转变
  • 批准号:
    25610095
  • 财政年份:
    2013
  • 资助金额:
    $ 76.13万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Frustration Effects in Conductive Triangular Lattice Magnets
导电三角形晶格磁铁的挫败效应
  • 批准号:
    21340100
  • 财政年份:
    2009
  • 资助金额:
    $ 76.13万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Low-Temperature Magnetic Relaxation of the Spin Ice Compounds
自旋冰化合物的低温磁弛豫
  • 批准号:
    18340101
  • 财政年份:
    2006
  • 资助金额:
    $ 76.13万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
New Quantum Phenomena in Anisotropic Superconductors
各向异性超导体中的新量子现象
  • 批准号:
    17071007
  • 财政年份:
    2005
  • 资助金额:
    $ 76.13万
  • 项目类别:
    Grant-in-Aid for Scientific Research on Priority Areas
SUPERCONDUCTING STATE OF THE LAYERED RUTHENATE
层状钌酸盐的超导态
  • 批准号:
    09440136
  • 财政年份:
    1997
  • 资助金额:
    $ 76.13万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)

相似海外基金

Study on ruthenate superconductors using epitaxy techniques
利用外延技术研究钌酸盐超导体
  • 批准号:
    18H01866
  • 财政年份:
    2018
  • 资助金额:
    $ 76.13万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Field-temperature phase-diagram of a high quality ruthenate superconductor
高质量钌酸盐超导体的场温相图
  • 批准号:
    18K04715
  • 财政年份:
    2018
  • 资助金额:
    $ 76.13万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Controlling Magnetism, Metal-Insulator Transitions, and Superconductivity in Ruthenate Thin Films
控制钌酸盐薄膜中的磁性、金属-绝缘体转变和超导性
  • 批准号:
    1709255
  • 财政年份:
    2017
  • 资助金额:
    $ 76.13万
  • 项目类别:
    Continuing Grant
CAREER: New Physical Phenomena in Ruthenate Materials
职业:钌酸盐材料的新物理现象
  • 批准号:
    0645305
  • 财政年份:
    2007
  • 资助金额:
    $ 76.13万
  • 项目类别:
    Continuing Grant
A study on magnetic excitation and phase separation in the vicinity of the quantum critical point(QCP) in the strongly correlated electron system(SCES)
强相关电子系统(SCES)量子临界点(QCP)附近的磁激发和相分离研究
  • 批准号:
    15340118
  • 财政年份:
    2003
  • 资助金额:
    $ 76.13万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Magnetism and Superconductivity in Ruthenate-Cuprates: New Pathways to Novel Materials
钌酸盐铜酸盐的磁性和超导性:新型材料的新途径
  • 批准号:
    0105398
  • 财政年份:
    2001
  • 资助金额:
    $ 76.13万
  • 项目类别:
    Standard Grant
SUPERCONDUCTING STATE OF THE LAYERED RUTHENATE
层状钌酸盐的超导态
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    09440136
  • 财政年份:
    1997
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    $ 76.13万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Microstructure-Processing-Property-Performance Relationshipsin Integrated Ferroelectric Capacitors: The PLZT/Metallic Ruthenate/TiN System
集成铁电电容器的微结构-加工-性能-性能关系:PLZT/金属钌酸盐/TiN 系统
  • 批准号:
    9632707
  • 财政年份:
    1997
  • 资助金额:
    $ 76.13万
  • 项目类别:
    Standard Grant
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