About Carrier's Self-Trapping and Dynamical Rashba Splitting in the 2D Hybrid Perovskite (BA)2(MA)2Pb3l10

Weiyan Qi; Stefano Ponzoni; Guénolé Huitric; Vitaly Gorelov; Ashim Pramanik; Yannis Laplace; Marino Marsi; Evangelos Papalazarou; Sebastian F. Maehrlein; Emmanuelle Deleporte; Nitin Mallik; Amina Taleb-Ibrahimi; Azzedine Bendounan; Kaibo Zheng; Tönu Pullerits; Luca Perfetti

doi:10.1002/smll.202511410

About Carrier's Self-Trapping and Dynamical Rashba Splitting in the 2D Hybrid Perovskite (BA)₂(MA)₂Pb₃l₁₀

Weiyan Qi
, Stefano Ponzoni
, Guénolé Huitric
, Vitaly Gorelov
, Ashim Pramanik
, Yannis Laplace
, Marino Marsi
, Evangelos Papalazarou
, Sebastian F. Maehrlein
, Emmanuelle Deleporte
, Nitin Mallik
, Amina Taleb-Ibrahimi
, Azzedine Bendounan
, Kaibo Zheng
, Tönu Pullerits
, Luca Perfetti

Laboratoire des Solides Irradiés
Laboratoire de Physique des Solides
Max-Planck-Gesellschaft
Institute of Radiooncology - OncoRay
Technical University Dresden
ENS Paris-Saclay
Synchrotron SOLEIL
Technical University of Denmark
Lund University

Research output: Contribution to journal › Article › peer-review

Abstract

Time- and Angle-Resolved Photoelectron Spectroscopy (tr-ARPES) is employed to monitor photoexcited electrons in the 2D hybrid perovskite (BA) (Formula presented.) (MA) (Formula presented.) (Formula presented.) (Formula presented.). Photoelectron intensity maps are in good agreement with ab-initio calculations of the band structure. The effective mass is (Formula presented.) and (Formula presented.) for holes and electrons, respectively. In the photoexcited state, spin-orbit splitting of the conduction band cannot be resolved. This sets the upper bound of photoinduced Rashba coupling to (Formula presented.) eVÅ. The correlated electron-hole plasma evolves in Wannier excitons with Bohr radius of 2.8 nm, while no sign of self-trapping in small polarons is found within the investigated time window of up to 120 ps following photoexcitation.

Original language	English
Article number	e11410
Journal	Small
Volume	22
Issue number	17
DOIs	https://doi.org/10.1002/smll.202511410
Publication status	Published - 20 Mar 2026

Keywords

2D perovskite
Rashba
band structure
exciton
self trapping

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10.1002/smll.202511410

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Qi, W., Ponzoni, S., Huitric, G., Gorelov, V., Pramanik, A., Laplace, Y., Marsi, M., Papalazarou, E., Maehrlein, S. F., Deleporte, E., Mallik, N., Taleb-Ibrahimi, A., Bendounan, A., Zheng, K., Pullerits, T., & Perfetti, L. (2026). About Carrier's Self-Trapping and Dynamical Rashba Splitting in the 2D Hybrid Perovskite (BA)₂(MA)₂Pb₃l₁₀. Small, 22(17), Article e11410. https://doi.org/10.1002/smll.202511410

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title = "About Carrier's Self-Trapping and Dynamical Rashba Splitting in the 2D Hybrid Perovskite (BA)2(MA)2Pb3l10",

abstract = "Time- and Angle-Resolved Photoelectron Spectroscopy (tr-ARPES) is employed to monitor photoexcited electrons in the 2D hybrid perovskite (BA) (Formula presented.) (MA) (Formula presented.) (Formula presented.) (Formula presented.). Photoelectron intensity maps are in good agreement with ab-initio calculations of the band structure. The effective mass is (Formula presented.) and (Formula presented.) for holes and electrons, respectively. In the photoexcited state, spin-orbit splitting of the conduction band cannot be resolved. This sets the upper bound of photoinduced Rashba coupling to (Formula presented.) eV{\AA}. The correlated electron-hole plasma evolves in Wannier excitons with Bohr radius of 2.8 nm, while no sign of self-trapping in small polarons is found within the investigated time window of up to 120 ps following photoexcitation.",

keywords = "2D perovskite, Rashba, band structure, exciton, self trapping",

author = "Weiyan Qi and Stefano Ponzoni and Gu{\'e}nol{\'e} Huitric and Vitaly Gorelov and Ashim Pramanik and Yannis Laplace and Marino Marsi and Evangelos Papalazarou and Maehrlein, \{Sebastian F.\} and Emmanuelle Deleporte and Nitin Mallik and Amina Taleb-Ibrahimi and Azzedine Bendounan and Kaibo Zheng and T{\"o}nu Pullerits and Luca Perfetti",

note = "Publisher Copyright: {\textcopyright} 2026 Wiley-VCH GmbH.",

year = "2026",

month = mar,

day = "20",

doi = "10.1002/smll.202511410",

language = "English",

volume = "22",

journal = "Small",

issn = "1613-6810",

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Qi, W, Ponzoni, S, Huitric, G, Gorelov, V, Pramanik, A, Laplace, Y, Marsi, M, Papalazarou, E, Maehrlein, SF, Deleporte, E, Mallik, N, Taleb-Ibrahimi, A, Bendounan, A, Zheng, K, Pullerits, T & Perfetti, L 2026, 'About Carrier's Self-Trapping and Dynamical Rashba Splitting in the 2D Hybrid Perovskite (BA)₂(MA)₂Pb₃l₁₀', Small, vol. 22, no. 17, e11410. https://doi.org/10.1002/smll.202511410

TY - JOUR

T1 - About Carrier's Self-Trapping and Dynamical Rashba Splitting in the 2D Hybrid Perovskite (BA)2(MA)2Pb3l10

AU - Qi, Weiyan

AU - Ponzoni, Stefano

AU - Huitric, Guénolé

AU - Gorelov, Vitaly

AU - Pramanik, Ashim

AU - Laplace, Yannis

AU - Marsi, Marino

AU - Papalazarou, Evangelos

AU - Maehrlein, Sebastian F.

AU - Deleporte, Emmanuelle

AU - Mallik, Nitin

AU - Taleb-Ibrahimi, Amina

AU - Bendounan, Azzedine

AU - Zheng, Kaibo

AU - Pullerits, Tönu

AU - Perfetti, Luca

PY - 2026/3/20

Y1 - 2026/3/20

N2 - Time- and Angle-Resolved Photoelectron Spectroscopy (tr-ARPES) is employed to monitor photoexcited electrons in the 2D hybrid perovskite (BA) (Formula presented.) (MA) (Formula presented.) (Formula presented.) (Formula presented.). Photoelectron intensity maps are in good agreement with ab-initio calculations of the band structure. The effective mass is (Formula presented.) and (Formula presented.) for holes and electrons, respectively. In the photoexcited state, spin-orbit splitting of the conduction band cannot be resolved. This sets the upper bound of photoinduced Rashba coupling to (Formula presented.) eVÅ. The correlated electron-hole plasma evolves in Wannier excitons with Bohr radius of 2.8 nm, while no sign of self-trapping in small polarons is found within the investigated time window of up to 120 ps following photoexcitation.

AB - Time- and Angle-Resolved Photoelectron Spectroscopy (tr-ARPES) is employed to monitor photoexcited electrons in the 2D hybrid perovskite (BA) (Formula presented.) (MA) (Formula presented.) (Formula presented.) (Formula presented.). Photoelectron intensity maps are in good agreement with ab-initio calculations of the band structure. The effective mass is (Formula presented.) and (Formula presented.) for holes and electrons, respectively. In the photoexcited state, spin-orbit splitting of the conduction band cannot be resolved. This sets the upper bound of photoinduced Rashba coupling to (Formula presented.) eVÅ. The correlated electron-hole plasma evolves in Wannier excitons with Bohr radius of 2.8 nm, while no sign of self-trapping in small polarons is found within the investigated time window of up to 120 ps following photoexcitation.

KW - 2D perovskite

KW - Rashba

KW - band structure

KW - exciton

KW - self trapping

UR - https://www.scopus.com/pages/publications/105031050188

U2 - 10.1002/smll.202511410

DO - 10.1002/smll.202511410

M3 - Article

AN - SCOPUS:105031050188

SN - 1613-6810

VL - 22

JO - Small

JF - Small

IS - 17

M1 - e11410

ER -

About Carrier's Self-Trapping and Dynamical Rashba Splitting in the 2D Hybrid Perovskite (BA)₂(MA)₂Pb₃l₁₀

Abstract

Keywords

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