Quasiparticle density of states by inversion with maximum entropy method

doi:http://dx.doi.org/10.1103/PhysRevB.94.144505

CORC > 理论物理研究所 > 中国科学院理论物理研究所 > 理论物理所科研产出 > 理论物理所1978-2010年知识产出

	Quasiparticle density of states by inversion with maximum entropy method
	Sui, XH ; Wang, HT ; Tang, H 3; Su, ZB
刊名	PHYSICAL REVIEW B
	2016
卷号	94 期号:14 页码:144505
关键词	HIGH-TEMPERATURE SUPERCONDUCTORS MONTE-CARLO DATA BAYESIAN-INFERENCE CUPRATE SUPERCONDUCTORS ANALYTIC CONTINUATION ENERGY GAPS BI2SR2CACU2O8+DELTA PHYSICS POINT VIEW
DOI	http://dx.doi.org/10.1103/PhysRevB.94.144505
英文摘要	We propose to extract the quasiparticle density of states (DOS) of the superconductor directly from the experimentally measured superconductor-insulator-superconductor junction tunneling data by applying the maximum entropy method to the nonlinear systems. It merits the advantage of model independence with minimum a priori assumptions. Various components of the proposed method have been carefully investigated, including the meaning of the targeting function, the mock function, as well as the role and the designation of the input parameters. The validity of the developed scheme is shown by two kinds of tests for systems with known DOS. As a preliminary application to a Bi2Sr2CaCu2O8+delta sample with its critical temperature T-c = 89 K, we extract the DOS from the measured intrinsic Josephson junction current data at temperatures of T = 4.2 K, 45 K, 55 K, 95 K, and 130 K. The energy gap decreases with increasing temperature below T-c, while above T-c, a kind of energy gap survives, which provides an angle to investigate the pseudogap phenomenon in high-T-c superconductors. The developed method itself might be a useful tool for future applications in various fields.
学科主题	Physics
语种	英语
资助机构	Natural Science Foundation of China [11121403, 11434015] ; 973 projects [2010CB922904, 2011CB921500]
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/23289]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.[Sui, Xiao-Hong 2.Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China 3.[Wang, Han-Ting 4.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Sui, XH,Wang, HT,Tang, H,et al. Quasiparticle density of states by inversion with maximum entropy method[J]. PHYSICAL REVIEW B,2016,94(14):144505.
APA	Sui, XH,Wang, HT,Tang, H,&Su, ZB.(2016).Quasiparticle density of states by inversion with maximum entropy method.PHYSICAL REVIEW B,94(14),144505.
MLA	Sui, XH,et al."Quasiparticle density of states by inversion with maximum entropy method".PHYSICAL REVIEW B 94.14(2016):144505.