Current-Induced Forces and Hot Spots in Biased Nanojunctions

Jing Tao Lu, Rasmus Bjerregaard Christensen, Jian-Sheng Wang, Per Hedegård, Mads Brandbyge

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We investigate theoretically the interplay of current-induced forces (CIFs), Joule heating, and heat transport inside a current-carrying nanoconductor. We find that the CIFs, due to the electron-phonon coherence, can control the spatial heat dissipation in the conductor. This yields a significant asymmetric concentration of excess heating (hot spot) even for a symmetric conductor. When coupled to the electrode phonons, CIFs drive different phonon heat flux into the two electrodes. First-principles calculations on realistic biased nanojunctions illustrate the importance of the effect.
Original languageEnglish
JournalPhysical Review Letters
Issue number9
Pages (from-to)096801
Number of pages5
Publication statusPublished - 2015

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© 2015 American Physical Society

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