Temperature effect in the conductance of hydrogen molecule

✍ Scribed by M. Crisan; I. Grosu

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 118 KB
• Volume: 41
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/j.physe.2008.06.027

✦ Synopsis

We present a many-body calculation for the conductance of a conducting bridge of a simple hydrogen molecule between Pt electrodes. The experimental results showed that the conductance G ¼ dI=dV has the maximum value near the quantum unit G 0 ¼ 2e 2 =h. The I-V dependence presents peak and dip and we consider that the electron-phonon interaction is responsible for this behavior. At T ¼ 0 there is a step in this dependence for the energy of phonons o 0 which satisfies eV ¼ o 0 . We calculated the conductance at finite temperature and showed that dGðTÞ=dV / 1=4T cosh 2 ðeV À o 0 Þ=2T.