Electronic stopping power of slow-light channeling ions in ZnTe from first principles
文献类型：期刊论文
| 作者 | Li, Chang-kai1,2; Mao, Fei3; Wang, Feng4; Fu, Yan-long1,2; Ouyang, Xiao-ping6; Zhang, Feng-Shou1,2,5 |
| 刊名 | PHYSICAL REVIEW A
 |
| 出版日期 | 2017-05-22 |
| 卷号 | 95 |
| ISSN号 | 2469-9926 |
| DOI | 10.1103/PhysRevA.95.052706 |
| 英文摘要 | Nonadiabatic dynamics simulations are performed to investigate the electronic stopping power of a helium ion moving through ZnTe crystalline thin films under channeling conditions. Using ab initio time-dependent density-functional theory, we found by direct simulation that electronic stopping power versus projectile velocity deviates from velocity proportionality and displays a transition between two velocity regimes for helium ions channeling along middle crystalline axes in < 100 > and < 111 > channels and also in a < 110 > channel with low-impact parameters. This transition causes a change in the slope of the energy loss versus ion velocity curve at a characteristic velocity related to the impact parameter and the lattice plane spacing. It may be an indication of extra energy loss channel beyond the electron-hole excitation. To analyze it, we checked the charge transfer between the moving projectiles and host atoms. It is found that the soft transition between two velocity regimes can be attributed to the resonant coherent excitation stimulated by the time-periodic potential experienced by the channeling ion and also the charge exchange in close encounters between Helium ion and host atoms. |
| WOS关键词 | DENSITY-FUNCTIONAL THEORY ; ENERGY-LOSS ; DYNAMICS ; SOLIDS ; SCATTERING ; VELOCITY ; CAPTURE ; PROTONS ; GAS ; PROPORTIONALITY |
| 资助项目 | European Commissions 7th Framework Programme (FP7-PEOPLE-IRSES)[269131] |
| WOS研究方向 | Optics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000401984700004 |
| 出版者 | AMER PHYSICAL SOC |
| 源URL | [http://119.78.100.186/handle/113462/56863]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Zhang, Feng-Shou |
| 作者单位 | 1.Beijing Normal Univ, Coll Nucl Sci & Technol, Minist Educ, Key Lab Beam Technol & Mat Modificat, Beijing 100875, Peoples R China 2.Beijing Radiat Ctr, Beijing 100875, Peoples R China 3.Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China 4.Beijing Inst Technol, Sch Phys, Beijing 100081, Peoples R China 5.Natl Lab Heavy IonAccelerator Lanzhou, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China 6.Northwest Inst Nucl Technol, Xian 710024, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Chang-kai,Mao, Fei,Wang, Feng,et al. Electronic stopping power of slow-light channeling ions in ZnTe from first principles[J]. PHYSICAL REVIEW A,2017,95. |
| APA | Li, Chang-kai,Mao, Fei,Wang, Feng,Fu, Yan-long,Ouyang, Xiao-ping,&Zhang, Feng-Shou.(2017).Electronic stopping power of slow-light channeling ions in ZnTe from first principles.PHYSICAL REVIEW A,95. |
| MLA | Li, Chang-kai,et al."Electronic stopping power of slow-light channeling ions in ZnTe from first principles".PHYSICAL REVIEW A 95(2017). |
入库方式： OAI收割
来源：近代物理研究所
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