Spin-dependent transport properties of hetero-junction based on zigzag graphene nanoribbons with edge hydrogenation and oxidation

2016 ◽  
Vol 380 (5-6) ◽  
pp. 730-738 ◽  
Author(s):  
Li-ling Cui ◽  
Meng-qiu Long ◽  
Xiao-jiao Zhang ◽  
Xin-mei Li ◽  
Dan Zhang ◽  
...  
2019 ◽  
Vol 21 (47) ◽  
pp. 26027-26032
Author(s):  
Wudmir Y. Rojas ◽  
Cesar E. P. Villegas ◽  
Alexandre R. Rocha

Ab initio spin-dependent transport properties of armchair graphene nanoribbons are studied with emphasis in determining the spin-relaxation length.


2012 ◽  
Vol 21 (1) ◽  
pp. 017305 ◽  
Author(s):  
Hua Zhao ◽  
Xiao-Wei Zhang ◽  
Tuo Cai ◽  
Tian Sang ◽  
Xiao-Chun Liu ◽  
...  

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Yun Li ◽  
Xiaobo Li ◽  
Shidong Zhang ◽  
Liemao Cao ◽  
Fangping Ouyang ◽  
...  

AbstractStrain engineering has become one of the effective methods to tune the electronic structures of materials, which can be introduced into the molecular junction to induce some unique physical effects. The various γ-graphyne nanoribbons (γ-GYNRs) embedded between gold (Au) electrodes with strain controlling have been designed, involving the calculation of the spin-dependent transport properties by employing the density functional theory. Our calculated results exhibit that the presence of strain has a great effect on transport properties of molecular junctions, which can obviously enhance the coupling between the γ-GYNR and Au electrodes. We find that the current flowing through the strained nanojunction is larger than that of the unstrained one. What is more, the length and strained shape of the γ-GYNR serves as the important factors which affect the transport properties of molecular junctions. Simultaneously, the phenomenon of spin-splitting occurs after introducing strain into nanojunction, implying that strain engineering may be a new means to regulate the electron spin. Our work can provide theoretical basis for designing of high performance graphyne-based devices in the future.


2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Yipeng An ◽  
Kun Wang ◽  
Shijing Gong ◽  
Yusheng Hou ◽  
Chunlan Ma ◽  
...  

AbstractTwo-dimensional (2D) magnetic materials are essential for the development of the next-generation spintronic technologies. Recently, layered van der Waals (vdW) compound MnBi2Te4 (MBT) has attracted great interest, and its 2D structure has been reported to host coexisting magnetism and topology. Here, we design several conceptual nanodevices based on MBT monolayer (MBT-ML) and reveal their spin-dependent transport properties by means of the first-principles calculations. The pn-junction diodes and sub-3-nm pin-junction field-effect transistors (FETs) show a strong rectifying effect and a spin filtering effect, with an ideality factor n close to 1 even at a reasonably high temperature. In addition, the pip- and nin-junction FETs give an interesting negative differential resistive (NDR) effect. The gate voltages can tune currents through these FETs in a large range. Furthermore, the MBT-ML has a strong response to light. Our results uncover the multifunctional nature of MBT-ML, pave the road for its applications in diverse next-generation semiconductor spin electric devices.


2020 ◽  
Vol 126 (7) ◽  
Author(s):  
Qian Liu ◽  
Yaqiang Tian ◽  
Xiaoping Zheng ◽  
Liansheng Chen ◽  
Yuqing Zhao ◽  
...  

2020 ◽  
Vol 8 (9) ◽  
pp. 3137-3146 ◽  
Author(s):  
Xuefei Han ◽  
Wenbo Mi ◽  
Dunhui Wang

Spin-dependent transport properties and light modulation of Fe4N/C60/Fe4N and LSMO/C60/Fe4N single molecule magnetic tunnel junctions.


2012 ◽  
Vol 51 (2) ◽  
pp. 02BM01 ◽  
Author(s):  
Takafumi Akiho ◽  
Tetsuya Uemura ◽  
Masanobu Harada ◽  
Ken-ichi Matsuda ◽  
Masafumi Yamamoto

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