Quasiparticle density of states by inversion with maximum entropy method
文献类型：期刊论文
| 作者 | 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.
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| 刊名 | PHYSICAL REVIEW B
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| 出版日期 | 2016 |
| 卷号 | 94期号:14页码:144505 |
| 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 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/21508]  |
| 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 | 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. |
入库方式： OAI收割
来源：理论物理研究所
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