Publications [#235020] of Weitao Yang

Journal Articles
  1. Ke, S-H; Yang, W; Baranger, HU, Quantum-interference-controlled molecular electronics., Nano Letters, vol. 8 no. 10 (October, 2008), pp. 3257-3261 [18803424], [doi] .

    Quantum interference in coherent transport through single molecular rings may provide a mechanism to control the current in molecular electronics. We investigate its applicability, using a single-particle Green function method combined with ab initio electronic structure calculations. We find that the quantum interference effect (QIE) is strongly dependent on the interaction between molecular pi-states and contact sigma-states. It is masked by sigma tunneling in small molecular rings with Au leads, such as benzene, due to strong pi-sigma hybridization, while it is preserved in large rings, such as [18]annulene, which then could be used to realize quantum interference effect (QIE) transistors.