Agraït Nicolás, Untiedt Carlos, Rubio-Bollinger Gabino, Vieira Sebastián
Laboratorio de Bajas Temperaturas, Departamento de Física de la Materia Condensada C-III, and Instituto Universitario de Ciencia de Materiales Nicolás Cabrera, Universidad Autónoma de Madrid, E-28049 Madrid, Spain.
Phys Rev Lett. 2002 May 27;88(21):216803. doi: 10.1103/PhysRevLett.88.216803. Epub 2002 May 13.
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.
利用扫描隧道显微镜在低温下研究了长度达七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，在这些单模弹道原子线中，直到几毫伏量级的有限电压阈值，输运都是无耗散的。导线内部耗散和电阻的开始对应于穿过导线的电子对原子振动的激发，并且对应变非常敏感。
