Vanishing electronic energy loss of very slow light ions in insulators with large band gaps.
Vanishing electronic energy loss of very slow light ions in insulators with large band gaps.
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DOI：
10.1103/physrevlett.103.113201
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发表时间：
2009-09
影响因子：
8.6
通讯作者：
S. Markin;D. Primetzhofer;P. Bauer
中科院分区：
文献类型：
--
作者：
S. Markin;D. Primetzhofer;P. Bauer
研究了极低速度下轻离子在大带隙材料纳米薄膜中的电子能量损失。对于LiF，在0.1 a. u. (250 eV/u），低于该值离子移动而不向电子系统传递能量。对于KCl，一个较低的（外推）阈值速度被发现，相同的H和He离子。对于SiO2，没有观察到明显的速度阈值的He粒子。对于质子和氘核，电子停止被发现完美地实现速度标度，如预期的二元离子-电子相互作用。
Electronic energy loss of light ions in nanometer films of materials with large band gaps has been studied for very low velocities. For LiF, a threshold velocity is observed at 0.1 a.u. (250 eV/u), below which the ions move without transferring energy to the electronic system. For KCl, a lower (extrapolated) threshold velocity is found, identical for H and He ions. For SiO2, no clear velocity threshold is observed for He particles. For protons and deuterons, electronic stopping is found to perfectly fulfill velocity scaling, as expected for binary ion-electron interaction.