Transmission and trapping of cold electrons in water ice.
Transmission and trapping of cold electrons in water ice.
复制标题
水冰中冷电子的传输和捕获。
DOI：
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发表时间：
2011
影响因子：
2.9
通讯作者：
J. Ziesel
中科院分区：
文献类型：
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作者：
R. Balog;P. Cicman;D. Field;L. Feketeová;Kristin Høydalsvik;N. Jones;T. Field;J. Ziesel
据报道，实验表明，低能（“冷”）电子电流在 135 K 下以 0 到 650 meV 的能量无衰减地穿过结晶冰，最高可达 430 个双层的最大研究薄膜厚度，表明明显的俘获可以忽略不计。相比之下，多孔非晶冰和致密结晶冰在 40 K 下都表现出有效的电子捕获能力。中间温度的冰揭示了亚稳态俘获，在 110 K 下会在几百秒内衰变。我们的结果首次证明了高温水冰中冷电子的完全传输以及温度依赖性俘获现象。
Experiments are reported which show that currents of low energy ("cold") electrons pass unattenuated through crystalline ice at 135 K for energies between zero and 650 meV, up to the maximum studied film thickness of 430 bilayers, indicating negligible apparent trapping. By contrast, both porous amorphous ice and compact crystalline ice at 40 K show efficient electron trapping. Ice at intermediate temperatures reveals metastable trapping that decays within a few hundred seconds at 110 K. Our results are the first to demonstrate full transmission of cold electrons in high temperature water ice and the phenomenon of temperature-dependent trapping.