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arXiv 0909.4068cond-mat.mes-hallgr-qc
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石墨烯及相关系统中的位错和扭转

Dislocations and torsion in graphene and related systems

Fernando de Juan, Alberto Cortijo, María A. H. Vozmediano

摘要:

描述和分析了一个研究位错对凝聚态系统电子性质影响的连续介质模型。该模型是基于一个几何形式主义相关联的位错密度与扭转张量,并在弯曲的空间中使用量子场论的技术。当应用到二维系统的狄拉克点,如石墨烯,我们发现,位错耦合的形式类似于由曲率或弹性应变产生的矢量规范场。我们还描述了如何耦合位错的正常金属与费米面。

英文摘要:

A continuum model to study the influence of dislocations on the electronic properties of condensed matter systems is described and analyzed. The model is based on a geometrical formalism that associates a density of dislocations with the torsion tensor and uses the technique of quantum field theory in curved space. When applied to two-dimensional systems with Dirac points like graphene we find that dislocations couple in the form of vector gauge fields similar to these arising from curvature or elastic strain. We also describe the ways to couple dislocations to normal metals with a Fermi surface.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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