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Competition and coexistence of order parameters in holographic multi-band superconductors
Cai, Rong-Gen1; Li, Li1; Li, Li-Fang1,2; Wang, Yong-Qiang3; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationJOURNAL OF HIGH ENERGY PHYSICS
2013-09-13
Issue9Pages:074
ISSN1029-8479
Language英语
KeywordAds-cft Correspondence Holography And Condensed Matter Physics (Ads/cmt) Phenomenological Models
AbstractWe construct a holographic multi-band superconductor model with each complex scalar field in the bulk minimally coupled to a same gauge field. Taking into account the back reaction of matter fields on the background geometry and focusing on the two band case with two scalar order parameters, we find that depending on the strength of the back reaction and the charge ratio of the two bulk scalars, five different superconducting phases exist, and three of five phases exhibit some region where both orders coexist and are thermodynamically favored. The other two superconducting phases have only one scalar order. The model exhibits rich phase structure and we construct the full diagram for the five superconducting phases. Our analysis indicates that the equivalent attractive interaction mediated by gravity between the two order parameters tends to make the coexistence of two orders much more easy rather than more difficult.; We construct a holographic multi-band superconductor model with each complex scalar field in the bulk minimally coupled to a same gauge field. Taking into account the back reaction of matter fields on the background geometry and focusing on the two band case with two scalar order parameters, we find that depending on the strength of the back reaction and the charge ratio of the two bulk scalars, five different superconducting phases exist, and three of five phases exhibit some region where both orders coexist and are thermodynamically favored. The other two superconducting phases have only one scalar order. The model exhibits rich phase structure and we construct the full diagram for the five superconducting phases. Our analysis indicates that the equivalent attractive interaction mediated by gravity between the two order parameters tends to make the coexistence of two orders much more easy rather than more difficult.
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1514
Collection空间科学部
Corresponding Author北京8701信箱
Affiliation1.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China
3.Lanzhou Univ, Inst Theoret Phys, Lanzhou 730000, Peoples R China
Recommended Citation
GB/T 7714
Cai, Rong-Gen,Li, Li,Li, Li-Fang,et al. Competition and coexistence of order parameters in holographic multi-band superconductors[J]. JOURNAL OF HIGH ENERGY PHYSICS,2013(9):074.
APA Cai, Rong-Gen,Li, Li,Li, Li-Fang,Wang, Yong-Qiang,&北京8701信箱.(2013).Competition and coexistence of order parameters in holographic multi-band superconductors.JOURNAL OF HIGH ENERGY PHYSICS(9),074.
MLA Cai, Rong-Gen,et al."Competition and coexistence of order parameters in holographic multi-band superconductors".JOURNAL OF HIGH ENERGY PHYSICS .9(2013):074.
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