Podzorov V, Menard E, Borissov A, Kiryukhin V, Rogers J A, Gershenson M E
Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey, USA.
Phys Rev Lett. 2004 Aug 20;93(8):086602. doi: 10.1103/PhysRevLett.93.086602.
The air-gap field-effect technique enabled realization of the intrinsic (not limited by static disorder) polaronic transport on the surface of rubrene (C42H28) crystals over a wide temperature range. The signatures of this intrinsic transport are the anisotropy of the carrier mobility, mu, and the growth of mu with cooling. Anisotropy of mu vanishes in the activation regime at low temperatures, where the transport is dominated by shallow traps. The deep traps, introduced by x-ray radiation, increase the field-effect threshold without affecting mu, an indication that the filled traps do not scatter polarons.
气隙场效应技术能够在很宽的温度范围内在红荧烯（C42H28）晶体表面实现本征（不受静态无序限制）的极化子输运。这种本征输运的特征是载流子迁移率μ的各向异性以及μ随温度降低而增大。在低温下的激活 regime 中，μ的各向异性消失，此时输运由浅陷阱主导。由X射线辐射引入的深陷阱提高了场效应阈值，而不影响μ，这表明被填充的陷阱不会散射极化子。
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