Graphene Nanoribbon Spin-Photodetector

被引:39
作者
Zamani, Sara [1 ]
Farghadan, Rouhollah [1 ]
机构
[1] Univ Kashan, Dept Phys, Kashan 8731753153, Iran
来源
PHYSICAL REVIEW APPLIED | 2018年 / 10卷 / 03期
关键词
OPTICAL-PROPERTIES; HYBRID STRUCTURES; ZIGZAG; GENERATION; TRANSPORT; JUNCTION; DEVICES; EDGES;
D O I
10.1103/PhysRevApplied.10.034059
中图分类号
O59 [应用物理学];
学科分类号
摘要
We introduce a concept to generate spin-polarized currents in graphene nanoribbons by using light radiation and a significant electron-electron interaction. For this purpose, we design a phototransistor based on the sawtoothlike graphene nanoribbons (SGNRs). The structures, with their intrinsic magnetic moments, have a narrow spin-dependent band around their Fermi energy that can enhance interband transitions and produce a spin photocurrent at room temperature without applying any magnetic field and without using any element. Interestingly, the changes in the size parameters and the gate voltage modify the magnitude and position of optical absorption peaks and optical spin polarization and the gate voltage individually switches the sign of the spin photocurrent. Finally, the fully spin-polarized photocurrent, the high quantum efficiency with a maximum of approximately 40%, the wide-wavelength-range operation from ultraviolet to infrared and optical spin-filtering effects, that are tunable with size and gate voltage, pave the way toward the improved design and performance of spin-optoelectronic devices based only on carbon atoms.
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页数:10
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共 62 条
[1]   Optical and magneto-optical far-infrared properties of bilayer graphene [J].
Abergel, D. S. L. ;
Fal'ko, Vladimir I. .
PHYSICAL REVIEW B, 2007, 75 (15)
[2]   Modeling of nanoscale devices [J].
Anantram, M. P. ;
Lundstrom, Mark S. ;
Nikonov, Dmitri E. .
PROCEEDINGS OF THE IEEE, 2008, 96 (09) :1511-1550
[3]   Graphene Photonics, Plasmonics, and Broadband Optoelectronic Devices [J].
Bao, Qiaoliang ;
Loh, Kian Ping .
ACS NANO, 2012, 6 (05) :3677-3694
[4]  
Bottegoni F, 2014, NAT MATER, V13, P790, DOI [10.1038/NMAT4015, 10.1038/nmat4015]
[5]   Atomically precise bottom-up fabrication of graphene nanoribbons [J].
Cai, Jinming ;
Ruffieux, Pascal ;
Jaafar, Rached ;
Bieri, Marco ;
Braun, Thomas ;
Blankenburg, Stephan ;
Muoth, Matthias ;
Seitsonen, Ari P. ;
Saleh, Moussa ;
Feng, Xinliang ;
Muellen, Klaus ;
Fasel, Roman .
NATURE, 2010, 466 (7305) :470-473
[6]   Graphene Spintronic Devices with Molecular Nanomagnets [J].
Candini, Andrea ;
Klyatskaya, Svetlana ;
Ruben, Mario ;
Wernsdorfer, Wolfgang ;
Affronte, Marco .
NANO LETTERS, 2011, 11 (07) :2634-2639
[7]   Carbon nanotube photovoltaic device with asymmetrical contacts [J].
Chen, Changxin ;
Zhang, Wei ;
Kong, Eric Siu-Wai ;
Zhang, Yafei .
APPLIED PHYSICS LETTERS, 2009, 94 (26)
[8]   Towards intrinsic magnetism of graphene sheets with irregular zigzag edges [J].
Chen, Lianlian ;
Guo, Liwei ;
Li, Zhilin ;
Zhang, Han ;
Lin, Jingjing ;
Huang, Jiao ;
Jin, Shifeng ;
Chen, Xiaolong .
SCIENTIFIC REPORTS, 2013, 3
[9]   Giant room-temperature spin caloritronics in spin-semiconducting graphene nanoribbons [J].
Chen, Xiaobin ;
Liu, Yizhou ;
Gu, Bing-Lin ;
Duan, Wenhui ;
Liu, Feng .
PHYSICAL REVIEW B, 2014, 90 (12)
[10]  
Datta S., 2013, Quantum Transport: atom to Transistor