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Tuning the effective spin-orbit coupling in molecular semiconductors

Author

Listed:
  • Sam Schott

    (Cavendish Laboratory, University of Cambridge)

  • Erik R. McNellis

    (Institute of Physics, Johannes Gutenberg-Universität)

  • Christian B. Nielsen

    (Imperial College London
    Materials Research Institute and School of Biological and Chemical Sciences, Queen Mary University of London)

  • Hung-Yang Chen

    (Imperial College London)

  • Shun Watanabe

    (The University of Tokyo, 5-1-5 Kashiwanoha
    JST, PRESTO, 4-1-8 Honcho)

  • Hisaaki Tanaka

    (Nagoya University)

  • Iain McCulloch

    (Imperial College London
    King Abdullah University of Science and Technology (KAUST), PSE)

  • Kazuo Takimiya

    (RIKEN Center for Emergent Matter Science)

  • Jairo Sinova

    (Institute of Physics, Johannes Gutenberg-Universität)

  • Henning Sirringhaus

    (Cavendish Laboratory, University of Cambridge)

Abstract

The control of spins and spin to charge conversion in organics requires understanding the molecular spin-orbit coupling (SOC), and a means to tune its strength. However, quantifying SOC strengths indirectly through spin relaxation effects has proven difficult due to competing relaxation mechanisms. Here we present a systematic study of the g-tensor shift in molecular semiconductors and link it directly to the SOC strength in a series of high-mobility molecular semiconductors with strong potential for future devices. The results demonstrate a rich variability of the molecular g-shifts with the effective SOC, depending on subtle aspects of molecular composition and structure. We correlate the above g-shifts to spin-lattice relaxation times over four orders of magnitude, from 200 to 0.15 μs, for isolated molecules in solution and relate our findings for isolated molecules in solution to the spin relaxation mechanisms that are likely to be relevant in solid state systems.

Suggested Citation

  • Sam Schott & Erik R. McNellis & Christian B. Nielsen & Hung-Yang Chen & Shun Watanabe & Hisaaki Tanaka & Iain McCulloch & Kazuo Takimiya & Jairo Sinova & Henning Sirringhaus, 2017. "Tuning the effective spin-orbit coupling in molecular semiconductors," Nature Communications, Nature, vol. 8(1), pages 1-10, August.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15200
    DOI: 10.1038/ncomms15200
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    Cited by:

    1. Xueli Yang & Ankang Guo & Jie Yang & Jinyang Chen & Ke Meng & Shunhua Hu & Ran Duan & Mingliang Zhu & Wenkang Shi & Yang Qin & Rui Zhang & Haijun Yang & Jikun Li & Lidan Guo & Xiangnan Sun & Yunqi Liu, 2024. "Halogenated-edge polymeric semiconductor for efficient spin transport," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    2. Yi Shen & Guodong Xue & Yasi Dai & Sergio Moles Quintero & Hanjiao Chen & Dongsheng Wang & Fang Miao & Fabrizia Negri & Yonghao Zheng & Juan Casado, 2021. "Normal & reversed spin mobility in a diradical by electron-vibration coupling," Nature Communications, Nature, vol. 12(1), pages 1-8, December.

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