ITP OpenIR  > 理论物理所2016年知识产出
Quasiparticle density of states by inversion with maximum entropy method
Sui, XH; Wang, HT; Tang, H; Su, ZB; Wang, HT (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
2016
发表期刊PHYSICAL REVIEW B
卷号94期号:14页码:144505
文章类型Article
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.
学科领域Physics
资助者Natural Science Foundation of China [11121403, 11434015] ; Natural Science Foundation of China [11121403, 11434015] ; 973 projects [2010CB922904, 2011CB921500] ; 973 projects [2010CB922904, 2011CB921500] ; Natural Science Foundation of China [11121403, 11434015] ; Natural Science Foundation of China [11121403, 11434015] ; 973 projects [2010CB922904, 2011CB921500] ; 973 projects [2010CB922904, 2011CB921500]
DOIhttp://dx.doi.org/10.1103/PhysRevB.94.144505
关键词[WOS]HIGH-TEMPERATURE SUPERCONDUCTORS ; MONTE-CARLO DATA ; BAYESIAN-INFERENCE ; CUPRATE SUPERCONDUCTORS ; ANALYTIC CONTINUATION ; ENERGY GAPS ; BI2SR2CACU2O8+DELTA ; PHYSICS ; POINT ; VIEW
收录类别SCI
语种英语
资助者Natural Science Foundation of China [11121403, 11434015] ; Natural Science Foundation of China [11121403, 11434015] ; 973 projects [2010CB922904, 2011CB921500] ; 973 projects [2010CB922904, 2011CB921500] ; Natural Science Foundation of China [11121403, 11434015] ; Natural Science Foundation of China [11121403, 11434015] ; 973 projects [2010CB922904, 2011CB921500] ; 973 projects [2010CB922904, 2011CB921500]
WOS类目Physics, Condensed Matter
引用统计
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/21508
专题理论物理所2016年知识产出
通讯作者Wang, HT (reprint author), 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,&Wang, HT .(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.
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