A comprehensive evaluation of factors that influence the spin polarization of electrons emitted from bulk GaAs photocathodes

doi:10.1063/1.4994306

	A comprehensive evaluation of factors that influence the spin polarization of electrons emitted from bulk GaAs photocathodes
	Poelker, Matt 1; Zhang, Shukui 1; Stutzman, Marcy 1; Liu, Wei1,2,3 ; Peng, Xincun 1,4
刊名	JOURNAL OF APPLIED PHYSICS
	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.
资助项目	U.S. DOE[DE-AC05-06OR23177] ; U.S. Government
WOS关键词	III-V COMPOUNDS ; GALLIUM-ARSENIDE ; LATTICE-RELAXATION ; PHOTOEMISSION ; MODEL ; ALAS
WOS研究方向	Physics
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000406128800042
资助机构	U.S. DOE ; U.S. Government
内容类型	期刊论文
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.