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Room temperature valley polarization via spin selective charge transfer

Author

Listed:
  • Shreetu Shrestha

    (Brookhaven National Laboratory)

  • Mingxing Li

    (Brookhaven National Laboratory)

  • Suji Park

    (Brookhaven National Laboratory)

  • Xiao Tong

    (Brookhaven National Laboratory)

  • Donald DiMarzio

    (Northrop Grumman Corporation, One Space Park)

  • Mircea Cotlet

    (Brookhaven National Laboratory)

Abstract

The two degenerate valleys in transition metal dichalcogenides can be used to store and process information for quantum information science and technology. A major challenge is maintaining valley polarization at room temperature where phonon-induced intervalley scattering is prominent. Here we demonstrate room temperature valley polarization in heterostructures of monolayer MoS2 and naphthylethylammine based one-dimensional chiral lead halide perovskite. By optically exciting the heterostructures with linearly polarized light close to resonance and measuring the helicity resolved photoluminescence, we obtain a degree of polarization of up to −7% and 8% in MoS2/right-handed (R-(+)-) and left-handed (S-(-)-) 1-(1-naphthyl)ethylammonium lead iodide perovskite, respectively. We attribute this to spin selective charge transfer from MoS2 to the chiral perovskites, where the perovskites act as a spin filter due to their chiral nature. Our study provides a simple, yet robust route to obtain room temperature valley polarization, paving the way for practical valleytronics devices.

Suggested Citation

  • Shreetu Shrestha & Mingxing Li & Suji Park & Xiao Tong & Donald DiMarzio & Mircea Cotlet, 2023. "Room temperature valley polarization via spin selective charge transfer," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-40967-7
    DOI: 10.1038/s41467-023-40967-7
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    References listed on IDEAS

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    1. Manoj K. Jana & Ruyi Song & Haoliang Liu & Dipak Raj Khanal & Svenja M. Janke & Rundong Zhao & Chi Liu & Z. Valy Vardeny & Volker Blum & David B. Mitzi, 2020. "Organic-to-inorganic structural chirality transfer in a 2D hybrid perovskite and impact on Rashba-Dresselhaus spin-orbit coupling," Nature Communications, Nature, vol. 11(1), pages 1-10, December.
    2. Sunihl Ma & Young-Kwang Jung & Jihoon Ahn & Jihoon Kyhm & Jeiwan Tan & Hyungsoo Lee & Gyumin Jang & Chan Uk Lee & Aron Walsh & Jooho Moon, 2022. "Elucidating the origin of chiroptical activity in chiral 2D perovskites through nano-confined growth," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    3. Ting Cao & Gang Wang & Wenpeng Han & Huiqi Ye & Chuanrui Zhu & Junren Shi & Qian Niu & Pingheng Tan & Enge Wang & Baoli Liu & Ji Feng, 2012. "Valley-selective circular dichroism of monolayer molybdenum disulphide," Nature Communications, Nature, vol. 3(1), pages 1-5, January.
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    Cited by:

    1. Qi Liu & Qi Wei & Hui Ren & Luwei Zhou & Yifan Zhou & Pengzhi Wang & Chenghao Wang & Jun Yin & Mingjie Li, 2023. "Circular polarization-resolved ultraviolet photonic artificial synapse based on chiral perovskite," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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