Superconductivity and Superfluidity in Restricted Dimensionality
Superconductivity and Superfluidity in Restricted Dimensionality
批准号:
8901723
负责人:
Richard Ferrell
金额:
$15.9万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1990
资助国家:
美国
项目状态:
已结题
起止时间:
1990-03-01 至 1993-08-31
中文摘要
他们提出了颗粒超导体中全球超导电性普遍开始的理论,这与最近的测量结果很好地一致。对破坏对称态的临界电流和动感也作了定量的预测。对单结的理论研究从检验因果关系和Anderson定理的要求等基本问题到发展变分格式作为一种实用的计算辅助手段。他们将继续他们对约瑟夫森相位涨落的研究,通过研究与相位相关的准粒子电容的全部量子力学含义,以及热涨落、磁场和无序对全球二维相干性的影响。建议对限制几何中的临界现象进行研究,包括液氦的Kapitza阻力。
英文摘要
They have developed a theory for the universal onset of global superconductivity in granular superconductors which is in good agreement with recent measurements. Quantitative predictions have also been made for the critical current and the kinetic inductance in the broken symmetry state. Theoretical investigations of single junctions have ranged from the examination of such fundamental issues as the requirements imposed by causality and by Anderson`s theorem to the development of a variational scheme as a practical computational aid. They will continue their work on Josephson phase fluctuations by studying the full quantum mechanical implications of the phase- dependent quasi-particle capacitance and the influence of thermal fluctuations, magnetic fields, and disorder on global two- dimensional coherence. Proposed investigations of critical phenomena in restricted geometries include that of the Kapitza resistance of liquid helium.
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会议论文
Non-Linear and Two-Dimensional Aspects of Multicritical Dynamics (Materials Research)
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批准号:8506009
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项目类别:Continuing Grant
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资助金额:$16.61万
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财政年份:1986
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负责人:Richard Ferrell
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依托单位:
Dynamical Scaling in Normal and Superfluid Liquids (Materials Research)
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批准号:8405409
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项目类别:Standard Grant
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资助金额:$6.97万
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财政年份:1984
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负责人:Richard Ferrell
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依托单位:
Eighteenth Annual Eastern Theoretical Physics Conference; November 16-17, 1979; College Park, Maryland
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批准号:7912306
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项目类别:Standard Grant
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资助金额:$0.5万
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财政年份:1979
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负责人:Richard Ferrell
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依托单位:
Dynamical Scaling in Normal and Superfluid Liquids
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批准号:7901172
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项目类别:Continuing Grant
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资助金额:$26.14万
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财政年份:1979
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负责人:Richard Ferrell
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依托单位:
Dynamical Scaling of Phase Transitions
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批准号:7414372
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项目类别:Standard Grant
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资助金额:$11.58万
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财政年份:1974
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负责人:Richard Ferrell
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依托单位:
海外基金