Non-perturbative SpectrumCalculation of Vortex Solid in Type-ⅡSuperconductors

Acta Scientiarum Naturalium Universitatis Pekinensis

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Non-perturbative SpectrumCalculation of Vortex Solid in Type-ⅡSuperconductors

ZHANG Li, CHEN Shuo, CHEN Yu, LI Dingping

Institute of Theoretical Physics, School of Physics, Peking University, Beijing 100871;

Received:2009-05-06 Online:2009-11-20 Published:2009-11-20

二类超导体中涡旋晶格激发谱的非微扰计算

张立,陈硕,陈宇,李定平

北京大学物理学院理论物理研究所, 北京100871;

Abstract

Abstract: The excitations in lattice in type-Ⅱsuperconductors in magnetic field contain acoustic and optical phonons. The acoustic phonon is Goldstone Boson with zero mass. By using Gaussian variational method, the authors calculate dispersion relations of acoustic and optical phonons non-perturbatively based on Ginzburg-Landau model with lowest Landau level approxi mation.

Key words: Abrikosov vortex lattice, Gaussian variational method

摘要： 磁场中二类超导体的Abrikosov涡旋晶格态中存在着两种激发子: 声学光子模和声学声子模。其中声学声子模是一种Goldstone Boson软模, 即静止质量为零的一种元激发。作者从Ginburg-Landau模型出发,对二类超导体最低Landau能级近似模型中, 使用改进的高斯变分法, 非微扰地计算了声学声子模和声学光子模的色散关系。

关键词: Abrikosov涡旋晶格, 高斯变分法

CLC Number:

O413

ZHANG Li,CHEN Shuo,CHEN Yu,LI Dingping. Non-perturbative SpectrumCalculation of Vortex Solid in Type-ⅡSuperconductors[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

张立,陈硕,陈宇,李定平. 二类超导体中涡旋晶格激发谱的非微扰计算[J]. 北京大学学报（自然科学版）.

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Non-perturbative SpectrumCalculation of Vortex Solid in Type-ⅡSuperconductors

二类超导体中涡旋晶格激发谱的非微扰计算

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