A comprehensive evaluation of factors that influence the spin polarization of electrons emitted from bulk GaAs photocathodes
文献类型：期刊论文
| 作者 | Poelker, Matt1; Zhang, Shukui1; Stutzman, Marcy1; Liu, Wei1,2,3 ; Peng, Xincun1,4
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| 刊名 | JOURNAL OF APPLIED PHYSICS
 |
| 出版日期 | 2017-07-21 |
| 卷号 | 122页码:9 |
| ISSN号 | 0021-8979 |
| DOI | 10.1063/1.4994306 |
| 英文摘要 | The degree of polarization of photoemitted electrons extracted from bulk unstrained GaAs photocathodes is usually considerably less than the theoretical maximum value of 50%, as a result of depolarization mechanisms that originate within the photocathode material and at the vacuum surface interface. This paper provides a comprehensive review of depolarization mechanisms and presents a systematic experimental evaluation of polarization sensitivities to temperature, dopant density, quantum efficiency, and crystal orientation. The highest measured polarization was similar to 50%, consistent with the maximum theoretical value, obtained from a photocathode sample with relatively low dopant concentration and cooled to 77 K. In general, measurements indicate electron spin polarization can be enhanced at the expense of photoelectron yield (or quantum efficiency). Published by AIP Publishing. |
| WOS关键词 | III-V COMPOUNDS ; GALLIUM-ARSENIDE ; LATTICE-RELAXATION ; PHOTOEMISSION ; MODEL ; ALAS |
| 资助项目 | U.S. DOE[DE-AC05-06OR23177] ; U.S. Government |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000406128800042 |
| 出版者 | AMER INST PHYSICS |
| 资助机构 | U.S. DOE ; U.S. Government |
| 源URL | [http://119.78.100.186/handle/113462/24421]  |
| 专题 | 近代物理研究所_离子源室 |
| 通讯作者 | Liu, Wei |
| 作者单位 | 1.Thomas Jefferson Natl Accelerator Facil, 12000 Jefferson Ave, Newport News, VA 23606 USA 2.Chinese Acad Sci, Inst Modern Phys, 509 Nanchang Rd, Lanzhou 730000, Gansu, Peoples R China 3.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 4.East China Inst Technol, Engn Res Ctr New Energy Technol Jiangxi Prov, Nanchang 330013, Jiangxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Poelker, Matt,Zhang, Shukui,Stutzman, Marcy,et al. A comprehensive evaluation of factors that influence the spin polarization of electrons emitted from bulk GaAs photocathodes[J]. JOURNAL OF APPLIED PHYSICS,2017,122:9. |
| APA | Poelker, Matt,Zhang, Shukui,Stutzman, Marcy,Liu, Wei,&Peng, Xincun.(2017).A comprehensive evaluation of factors that influence the spin polarization of electrons emitted from bulk GaAs photocathodes.JOURNAL OF APPLIED PHYSICS,122,9. |
| MLA | Poelker, Matt,et al."A comprehensive evaluation of factors that influence the spin polarization of electrons emitted from bulk GaAs photocathodes".JOURNAL OF APPLIED PHYSICS 122(2017):9. |
入库方式： OAI收割
来源：近代物理研究所
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