Spin injection across a III-V/chiral perovskite interface enabling spin accumulation at room temperature

Matthew P. Hautzinger; Xin Pan; Steven C. Hayden; Jiselle Y. Ye; Qi Jiang; Mickey J. Wilson; Yifan Dong; Emily K. Raulerson; Ian A. Leahy; Chun-Sheng Jiang; Joseph M. Luther; Yuan Lu; Katherine Jungjohann; Z. Valy Vardeny; Joseph J. Berry; Kirstin Alberi; Matthew C. Beard

arXiv · 2309.04559

Spin injection across a III-V/chiral perovskite interface enabling spin accumulation at room temperature

Matthew P. Hautzinger·Xin Pan·Steven C. Hayden·Jiselle Y. Ye·Qi Jiang·Mickey J. Wilson·Yifan Dong·Emily K. Raulerson·Ian A. Leahy·Chun-Sheng Jiang·Joseph M. Luther·Yuan Lu·Katherine Jungjohann·Z. Valy Vardeny·Joseph J. Berry·Kirstin Alberi·Matthew C. Beard

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Abstract

Spin accumulation in semiconductor structures at room temperature and without magnetic fields is key to enable a broader range of opto-electronic functionality. Current efforts are limited due to inherent inefficiencies associated with spin injection into semiconductor structures. Here, we demonstrate spin injection across chiral halide perovskite/III-V interfaces achieving spin accumulation in a standard semiconductor III-V (AlxGa1-x)0.5In0.5P multiple quantum well (MQW) light emitting diode (LED). The spin accumulation in the MQW is detected via emission of circularly polarized light with a degree of polarization of up to ~15%. The chiral perovskite/III-V interface was characterized with X-ray photoemission spectroscopy (XPS), cross sectional scanning Kelvin probe force microscopy, and cross section transmission electron microscopy (TEM) imaging, showing a clean semiconductor/semiconductor interface where the fermi-level can equilibrate. These findings demonstrate chiral perovskite semiconductors can transform well-developed semiconductor platforms to ones that can also control spin.

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Matthew P. Hautzinger, Xin Pan, Steven C. Hayden, Jiselle Y. Ye, Qi Jiang, Mickey J. Wilson, Yifan Dong, Emily K. Raulerson, Ian A. Leahy, Chun-Sheng Jiang, Joseph M. Luther, Yuan Lu, Katherine Jungjohann, Z. Valy Vardeny, Joseph J. Berry, Kirstin Alberi, Matthew C. Beard. 2023-09-08. Spin injection across a III-V/chiral perovskite interface enabling spin accumulation at room temperature. https://arxiv.org/abs/2309.04559

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