Onset of energy dissipation in ballistic atomic wires -: art. no. 216803
Onset of energy dissipation in ballistic atomic wires -: art. no. 216803
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DOI：
10.1103/physrevlett.88.216803
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发表时间：
2002-05-27
影响因子：
8.6
通讯作者：
Vieira, S
中科院分区：
文献类型：
--
作者：
Agraït, N;Untiedt, C;Vieira, S
在低温条件下，利用扫描隧道显微镜研究了长度为7个原子的独立金原子链在有限电压下的电子输运。电导与电压曲线表明，这些单模弹道原子导线中的输运在几个mV数量级的有限电压阈值内是非耗散的。导线内耗散和电阻的开始对应于通过导线的电子对原子振动的激发，并且对应变非常敏感。
Electronic transport at finite voltages in free-standing gold atomic chains of up to seven atoms in length is studied at low temperatures using a scanning tunneling microscope. The conductance vs voltage curves show that transport in these single-mode ballistic atomic wires is nondissipative up to a finite voltage threshold of the order of several mV. The onset of dissipation and resistance within the wire corresponds to the excitation of the atomic vibrations by the electrons traversing the wire and is very sensitive to strain.