Detail Nuclear Coupling and Polarization in Molecular Transport Junctions: Beyond Tunneling to Function   Oleh:  Galperin, Michael ; Ratner, Mark A. ; Nitzan, Abraham ; Troisi, Alessandro Jenis: Article from Bulletin/Magazine Dalam koleksi: SCIENCE (keterangan: ada di Proquest) vol. 319 no. 5866 (Feb. 2008), page 1056. Ketersediaan Perpustakaan FK Nomor Panggil: S01.K.2008.02 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel Much current experimental research on transport in molecular junctions focuses on finite voltages, where substantial polarization-induced nonlinearities may result in technologically relevant device-type responses. Because molecules have strong polarization responses to changing charge state or external field, molecules isolated between electrodes can show strongly nonlinear current-voltage responses. For small applied voltages (up to 0.3 volt), weak interaction between transporting electrons and molecular vibrations provides the basis for inelastic electron tunneling spectroscopy. At higher voltages and for certain time scale regimes, strong coupling effects occur, including Coulomb blockade, negative differential resistance, dynamical switching and switching noise, current hysteresis, heating, and chemical reactions. We discuss a general picture for such phenomena that arise from charging, strong correlation, and polarization (electronic and vibrational) effects in the molecule and at the interface. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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