Room-temperature spin control in WS ₂ enabled by chiral seeded lead-free chiral perovskites
- 1College of Smart Materials and Future Energy, State Key Laboratory of Photovoltaic Science and Technology, Fudan University, 220 Handan Road, Shanghai, China.
- 2Department of Chemistry, Fudan University, 220 Handan Road, Shanghai, China.
- 3Department of Mechanical Engineering, College of Engineering, City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong, China.
Abstract
Because of the temperature-induced intervalley scattering, transition metal dichalcogenides (TMDCs) typically exhibit diminished valley polarization at room temperature, limiting their application in valleytronic devices. To address this issue, combining chiral perovskites with monolayer TMDCs provides a promising route for room-temperature valley polarization control. Here, the enhanced chiral-induced spin selectivity (CISS) effect in R -(+)- and S -(−)-α-methylbenzylamine (MBA)–based tin perovskites is substantially strengthened by introducing chiral seed layers. Leveraging spin-valley coupling, spin extraction at the chiral perovskite interface improves the valley polarization of monolayer tungsten disulfide (WS 2 ) to reach as high as 14.9% at room temperature. The enhanced CISS effect enables more efficient spin-selective charge transfer, thereby amplifying the carrier population imbalance between the K and K′ valleys in monolayer WS 2 . This asymmetry is further improved by the high-quality chiral perovskite substrates, which help suppress valley carrier recombination. Our study offers a promising approach by combining chiral seed–induced enhancement of the CISS effect in chiral perovskite with monolayer TMDCs to achieve excellent performance of valley manipulation.
Related
- Majority-Rule of Enantiomeric Excess in Chiral Halide Perovskites for continuous tuning of chiroptical properties
- Ge ₂ Sb ₂ Te ₅ -enabled nonvolatile switching of symmetry-engineered chiral q-BIC states in mid-infrared metasurfaces
- High-Temperature Thermoelectric Potential of Ba2XReO6 (X = Li, Rb, Cs) Double Perovskites: A First-Principles Study
- Molecularly Engineered Nitrate Double Perovskites with Elevated Ferroelectric Phase Transition Temperature and Large Piezoelectric Response
- Interlayer Mismatch and Solvated Intermediates Control Spacer Mixing in 2D Perovskites
BibTeX
@article{jin2026roomtemperature,
title = {{Room-temperature spin control in WS ₂ enabled by chiral seeded lead-free chiral perovskites}},
author = {Zuoming Jin and Peilin Wang and Bing Chen and Tianpeng Li and Zhiguo Zhang and Qiyi Fang and Jia Liang},
journal = {Science Advances},
year = {2026},
month = oct,
doi = {10.1126/sciadv.aef0681},
url = {https://www.science.org/doi/10.1126/sciadv.aef0681},
note = {CC BY-NC},
}
RIS
TY - JOUR
TI - Room-temperature spin control in WS ₂ enabled by chiral seeded lead-free chiral perovskites
AU - Zuoming Jin
AU - Peilin Wang
AU - Bing Chen
AU - Tianpeng Li
AU - Zhiguo Zhang
AU - Qiyi Fang
AU - Jia Liang
PY - 2026
DA - 2026/10/02
JO - Science Advances
DO - 10.1126/sciadv.aef0681
UR - https://www.science.org/doi/10.1126/sciadv.aef0681
AB - Because of the temperature-induced intervalley scattering, transition metal dichalcogenides (TMDCs) typically exhibit diminished valley polarization at room temperature, limiting their application in valleytronic devices. To address this issue, combining chiral perovskites with monolayer TMDCs provides a promising route for room-temperature valley polarization control. Here, the enhanced chiral-induced spin selectivity (CISS) effect in R -(+)- and S -(−)-α-methylbenzylamine (MBA)–based tin perovskites is substantially strengthened by introducing chiral seed layers. Leveraging spin-valley coupling, spin extraction at the chiral perovskite interface improves the valley polarization of monolayer tungsten disulfide (WS 2 ) to reach as high as 14.9% at room temperature. The enhanced CISS effect enables more efficient spin-selective charge transfer, thereby amplifying the carrier population imbalance between the K and K′ valleys in monolayer WS 2 . This asymmetry is further improved by the high-quality chiral perovskite substrates, which help suppress valley carrier recombination. Our study offers a promising approach by combining chiral seed–induced enhancement of the CISS effect in chiral perovskite with monolayer TMDCs to achieve excellent performance of valley manipulation.
SN - 2375-2548
ER -