التفاصيل البيبلوغرافية
| العنوان: |
Highly anisotropic electronic transport properties of monolayer and bilayer phosphorene from first principles. |
| المؤلفون: |
Zhenghe Jin, Mullen, Jeffrey T., Ki Wook Kim |
| المصدر: |
Applied Physics Letters; 8/1/2016, Vol. 109 Issue 5, p053108-1-053108-5, 5p, 2 Charts, 5 Graphs |
| مصطلحات موضوعية: |
PHOSPHORENE, ANISOTROPY, MONOMOLECULAR films, CRYSTAL orientation, LIGHT scattering, VELOCITY, CONDUCTION bands |
| مستخلص: |
The intrinsic carrier transport dynamics in phosphorene is theoretically examined. Utilizing a density functional theory treatment, the low-field mobility and the saturation velocity are characterized for both electrons and holes in the monolayer and bilayer structures. The analysis clearly elucidates the crystal orientation dependence manifested through the anisotropic band structure and the carrier-phonon scattering rates. In the monolayer, the hole mobility in the armchair direction is estimated to be approximately five times larger than in the zigzag direction at room temperature (460 cm2/V s vs. 90cm2/V s). The bilayer transport, on the other hand, exhibits a more modest anisotropy with substantially higher mobilities (1610 cm2/V s and 760 cm2/V s, respectively). The calculations on the conduction-band electrons indicate a comparable dependence while the characteristic values are generally smaller by about a factor of two. The variation in the saturation velocity is found to be less pronounced. With the anticipated superior performance and the diminished anisotropy, few-layer phosphorene offers a promising opportunity particularly in p-type applications. [ABSTRACT FROM AUTHOR] |
|
Copyright of Applied Physics Letters is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Find this article in full text from Scitation.