journal article·2019-08-27

Organic Single-Crystal Spintronics: Magnetoresistance Devices with High Magnetic-Field Sensitivity

Shuaishuai Ding, Yuan Tian, Yang Li, Hantang Zhang, Ke Zhou, Jinyu Liu, Liang Qin, Xiaoxian Zhang, Xiaohui Qiu, Huanli Dong, Daoben Zhu, Wenping Hu

ACS Nano· Volume 13· Issue 8
Publisher page

Abstract

Organic spintronics is a new emerging field that deals with the spin-related phenomena of organic materials under the influence of a magnetic field. However, there remain some challenges in organic spintronics including (i) low conductivity and massive disorders of organic thin films blocking the way to controllable spin transport, (ii) relatively low magnetic-field sensitivity of organic magnetoresistance (OMAR) devices with tangled working mechanisms and short of methods for sensitivity improvement. Here, we report the realization of OMAR devices based on organic single crystals. The lesser amount of impurities and defects in crystals guarantees a reduction in spin and charge scatterings, so that the OMAR devices exhibit both a small Lorentz function fitting parameter B0 of 2.3 mT and a non-Lorentz function fitting parameter B1 of 0.86 mT in the strictly limited bipolaron model. Moreover, we demonstrate the effect of aggregation and intrinsic trap states, pointing out a way for the improvement of the sensitivity.
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Research context

OpenAlex topics: Organic Light-Emitting Diodes Research · Quantum and electron transport phenomena · Advanced Memory and Neural Computing

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China

University of Chinese Academy of Sciences, Beijing 100049, China

Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou 350207, China

National Center for Nanoscience & Technology, Beijing 100190, China

Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Sciences, Tianjin University, Tianjin 300072, China

Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Chinese Academy of Sciences · Central Committee of the Communist Party of China

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