Theory of dual fermion superconductivity in hole-doped cuprates

doi:http://dx.doi.org/10.1140/epjb/e2017-80233-2

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	Theory of dual fermion superconductivity in hole-doped cuprates
	Chang, J (reprint author), Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China.; Chang, J; Zhao, JZ; Chang, J (reprint author), Shaanxi Normal Univ, Coll Phys & Informat Technol, Xian 710119, Shaanxi, Peoples R China.
刊名	EUROPEAN PHYSICAL JOURNAL B
	2017
卷号	90 期号:8 页码:154
DOI	http://dx.doi.org/10.1140/epjb/e2017-80233-2
英文摘要	Since the discovery of the cuprate high-temperature superconductivity in 1986, a universal phase diagram has been constructed experimentally and numerous theoretical models have been proposed. However, there remains no consensus on the underlying physics thus far. Here, we theoretically investigate the phase diagram of hole-doped cuprates based on an itinerant-localized dual fermion model, with the charge carriers doped on the oxygen sites and localized holes on the copper d(x2-y2) orbitals. We analytically demonstrate that the puzzling anomalous normal state or the strange metal could simply stem from a free Fermi gas of carriers bathing in copper antiferromagnetic spin fluctuations. The short-range high-energy spin excitations also act as the "magnetic glue" of carrier Cooper pairs and induce d-wave superconductivity from the underdoped to overdoped regime, distinctly different from the conventional low-frequency magnetic fluctuation mechanism. We further sketch out the characteristic dome-shaped critical temperature T-c versus doping level. The emergence of the pseudogap is ascribed to the localization of partial carriers coupled to the local copper moments or a crossover from the strange metal to a nodal Kondo-like insulator. Our work provides a consistent theoretical framework to understand the typical phase diagram of hole-doped cuprates and paves a distinct way to the studies of both non-Fermi liquid and unconventional superconductivity in strongly correlated systems.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21993]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Chang, J (reprint author), Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China.; Chang, J (reprint author), Shaanxi Normal Univ, Coll Phys & Informat Technol, Xian 710119, Shaanxi, Peoples R China.
推荐引用方式 GB/T 7714	Chang, J ,Chang, J,Zhao, JZ,et al. Theory of dual fermion superconductivity in hole-doped cuprates[J]. EUROPEAN PHYSICAL JOURNAL B,2017,90(8):154.
APA	Chang, J ,Chang, J,Zhao, JZ,&Chang, J .(2017).Theory of dual fermion superconductivity in hole-doped cuprates.EUROPEAN PHYSICAL JOURNAL B,90(8),154.
MLA	Chang, J ,et al."Theory of dual fermion superconductivity in hole-doped cuprates".EUROPEAN PHYSICAL JOURNAL B 90.8(2017):154.