Gorbatsevich Alexander A, Krasnikov Gennadiy Ya, Shubin Nikolay M
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Division of solid state physics, Moscow, 119991 Russia.
JSC Molecular Electronics Research Institute, Zelenograd, Moscow 124460 Russia.
Sci Rep. 2018 Oct 25;8(1):15780. doi: 10.1038/s41598-018-34132-0.
We present a model of the molecular transistor, operation of which is based on the interplay between two physical mechanisms, peculiar to open quantum systems that act in concert: -symmetry breaking corresponding to coalescence of resonances at the exceptional point of the molecule, connected to the leads, and Fano-Feshbach antiresonance. This switching mechanism can be realised in particular in a special class of molecules with degenerate energy levels, e.g. diradicals, which possess mirror symmetry. At zero gate voltage infinitesimally small interaction of the molecule with the leads breaks the -symmetry of the system that, however, can be restored by application of the gate voltage preserving the mirror symmetry. -symmetry broken state at zero gate voltage with minimal transmission corresponds to the "off" state while the -symmetric state at non-zero gate voltage with maximum transmission - to the "on" state. At zero gate voltage energy of the antiresonance coincides with exceptional point. We construct a model of an all-electrical molecular switch based on such transistors acting as a conventional CMOS inverter and show that essentially lower power consumption and switching energy can be achieved, compared to the CMOS analogues.
我们提出了一种分子晶体管模型，其工作基于两种物理机制之间的相互作用，这两种机制是作用协同的开放量子系统所特有的：与连接到引线的分子在例外点处的共振合并相对应的对称性破缺，以及法诺 - 费什巴赫反共振。这种开关机制尤其可以在具有简并能级的一类特殊分子中实现，例如具有镜像对称性的双自由基。在零栅极电压下，分子与引线的极小相互作用会破坏系统的 - 对称性，然而，通过施加保持镜像对称性的栅极电压可以恢复这种对称性。零栅极电压下具有最小传输的 - 对称性破缺状态对应于“关”状态，而非零栅极电压下具有最大传输的 - 对称状态对应于“开”状态。在零栅极电压下，反共振能量与例外点重合。我们基于此类晶体管构建了一个全电分子开关模型，该模型充当传统的CMOS反相器，并表明与CMOS类似物相比，可以实现显著更低的功耗和开关能量。
