Striped phases in the holographic insulator/superconductor transition

Striped phases in the holographic insulator/superconductor transition
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全息绝缘体/超导体转变中的条纹相

DOI:
10.1007/jhep11(2013)027
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发表时间:
2013-07
影响因子:
5.4
通讯作者:
Da-Wei Pang
Da-Wei Pang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Johanna Erdmenger;葛先辉;Da-Wei Pang

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通过考虑空间调制的化学势,我们研究了AdS孤子背景下全息绝缘体/超导体相变中的条纹相。通常,条纹相可以在临界化学势以上发展。当化学势中的常数首项设为零时,在大波矢极限下,观察到电荷密度随化学势变化的不连续性。我们解释这种不连续性使用的分析方法。当化学势中的常数主导项存在时,临界化学势大于均匀化学势的情况,这表明空间调制的化学势不利于相变。这种行为再次通过分析方法得到证实。我们还计算了巨正则势,发现条纹相是有利的。
We study striped phases in holographic insulator/superconductor transition by considering a spatially modulated chemical potential in the AdS soliton background. Generally striped phases can develop above a critical chemical potential. When the constant leading term in the chemical potential is set to zero, a discontinuity is observed in the charge density as function of the chemical potential in the limit of large wave vector. We explain this discontinuity using an analytical approach. When the constant leading term in the chemical potential is present, the critical chemical potential is larger than in the case of a homogeneous chemical potential, which indicates that the spatially modulated chemical potential disfavors the phase transition. This behavior is again confirmed by an analytical approach. We also calculate the grand canonical potential and find that the striped phase is favored.
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