Thermally Assisted Rashba Splitting and Circular Photogalvanic Effect in Aqueously Synthesized 2D Dion-Jacobson Perovskite Crystals

Zhou，Boxuan1; Liang，Lihan1; Ma，Jiaqi1; Li，Junze1; Li，Wancai1; Liu，Zeyi1; Li，Haolin2; Chen，Rui2; Li，Dehui1,3

2021-06-09

10.1021/acs.nanolett.1c00364

NANO LETTERS   影响因子和分区

1530-6984

1530-6992

Recently, a two-dimensional Dion-Jacobson (DJ) perovskite (AMP)PbI4 (AMP = 4-(aminomethyl)piperidinium) is emerging with remarkable Rashba effect and ferroelectricity. However, the origin of the giant Rashba splitting remains elusive and the current synthetic strategy via slow cooling is time- and power-consuming, hindering its future applications. Here, we report on an economical aqueous method to obtain (AMP)PbI4 crystals and clarify the origin of the giant Rashba effect by temperature- and polarization-dependent photoluminescence (PL) spectroscopy. The strong temperature-dependent PL helicity indicates the thermally assisted structural distortion as the main origin of the Rashba effect, suggesting that valley polarization still preserves at high temperatures. The Rashba effect was further confirmed by the circular photogalvanic effect near the indirect bandgap. Our study not only optimizes the synthetic strategies of this DJ perovskite but also sheds light on its potential applications in room/high-temperature spintronics and valleytronics.

2D Dion-Jacobson perovskite aqueous synthesis circular photogalvanic effect Rashba effect

SCI ; EI

英语

NI论文

其他

WOS:000662078500010

20212610551818

Crystals ; Photoluminescence spectroscopy ; Polarization

Minerals:482.2 ; Optical Devices and Systems:741.3 ; Crystalline Solids:933.1

MATERIALS SCIENCE

2-s2.0-85108021092

Scopus

1.School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan,430074,China
2.Department of Electrical and Electronic Engineering Southern University of Science and Technology,Shenzhen,518055,China
3.Wuhan National Laboratory for Optoelectronics and School of Physics,Huazhong University of Science and Technology,Wuhan,430074,China

Zhou，Boxuan,Liang，Lihan,Ma，Jiaqi,et al. Thermally Assisted Rashba Splitting and Circular Photogalvanic Effect in Aqueously Synthesized 2D Dion-Jacobson Perovskite Crystals[J]. NANO LETTERS,2021,21(11):4584-4591.

Zhou，Boxuan.,Liang，Lihan.,Ma，Jiaqi.,Li，Junze.,Li，Wancai.,...&Li，Dehui.(2021).Thermally Assisted Rashba Splitting and Circular Photogalvanic Effect in Aqueously Synthesized 2D Dion-Jacobson Perovskite Crystals.NANO LETTERS,21(11),4584-4591.

Zhou，Boxuan,et al."Thermally Assisted Rashba Splitting and Circular Photogalvanic Effect in Aqueously Synthesized 2D Dion-Jacobson Perovskite Crystals".NANO LETTERS 21.11(2021):4584-4591.