Millisecond dynamics of thermal expansion of mechanically controllable break junction electrodes studied in the tunneling regime

Kolesnychenko, O. Yu.; Toonen, A. J.; Shklyarevskii, O. I.; van Kempen, H.
October 2001
Applied Physics Letters;10/22/2001, Vol. 79 Issue 17, p2707
Academic Journal
The thermal expansion dynamics of W, Pt–Ir, and Au mechanically controllable break junction electrodes was studied in the millisecond range. By measuring a transient tunnel current as a function of time, we found that, at low temperatures, the electrode elongation Δs∼t[sup ½] due to the large values of thermal diffusivity of metals. The magnitude of Δs varies in direct proportion to the power P dissipated in the electrodes. © 2001 American Institute of Physics.


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