Bulk Photovoltaic Effect in Single Ferroelectric Domain of SnS Crystal and Control of Local Polarization by Strain

Ryo Nanae; Satsuki Kitamura; Yih‐Ren Chang; Kaito Kanahashi; Tomonori Nishimura; Redhwan Moqbel; Kung‐Hsuan Lin; Mina Maruyama; Yanlin Gao; Susumu Okada; Kai Qi; Jui‐Han Fu; Vincent Tung; Takashi Taniguchi; Kenji Watanabe; Kosuke Nagashio

doi:10.1002/adfm.202406140

journal article·2024-10Open access

Bulk Photovoltaic Effect in Single Ferroelectric Domain of SnS Crystal and Control of Local Polarization by Strain

Ryo Nanae, Satsuki Kitamura, Yih‐Ren Chang, Kaito Kanahashi, Tomonori Nishimura, Redhwan Moqbel, Kung‐Hsuan Lin, Mina Maruyama, Yanlin Gao, Susumu Okada, Kai Qi, Jui‐Han Fu, Vincent Tung, Takashi Taniguchi, Kenji Watanabe, Kosuke Nagashio

Advanced Functional Materials· Volume 34· Issue 41

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Source abstract

Abstract

Abstract The bulk photovoltaic effect (BPVE) in ferroelectrics, wherein spontaneous polarization can be reversed within crystals lacking centrosymmetry, encompasses the significant contribution of ferroelectric domain walls (DWs), known as DW‐PVE. Nevertheless, the separation between intrinsic BPVE within the domain and DW‐PVE remains unexplored in 2D ferroelectrics, notwithstanding its significant importance. In this study, sizable crystals of 2D ferroelectric SnS are successfully grown, facilitating a comprehensive yet intricate examination of domain configurations utilizing polarized optical microscopy and piezoresponse force microscopy. By properly selecting the large ferroelectric single domain within SnS crystals, uniform intrinsic BPVE across the domain is unequivocally demonstrated. Furthermore, to further enhance intrinsic BPVE, manipulation of strain poling increased photocurrent, suggesting that locally distributed polarizations due to imperfection introduced in SnS crystals are aligned by strain. These results will offer a new avenue for rigorous comprehension of DW‐PVE in 2D ferroelectrics.

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Research context

Electronic materials

OpenAlex topics: Chalcogenide Semiconductor Thin Films · Semiconductor materials and interfaces · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Engineering The University of Tokyo 7‐3‐1 Hongo, Bunkyo Tokyo 113‐8656 Japan

Nanoscale Quantum Photonics Laboratory RIKEN Cluster for Pioneering Research 2‐1 Hirosawa Wako Saitama 351‐0198 Japan

Institute of Physics Academia Sinica No. 128, Sec. 2, Academia Rd. Nangang Dist. Taipei 115201 Taiwan

Department of Physics University of Tsukuba 1‐1‐1 Tennodai Tsukuba Ibaraki 305‐8571 Japan

Department of Chemical System Engineering The University of Tokyo 7‐3‐1 Hongo, Bunkyo Tokyo 113‐8656 Japan

Research Center for Materials Nanoarchitectonics National Institute of Materials Science 1‐1 Namiki Tsukuba Ibaraki 305‐0044 Japan

Research Center for Electronic and Optical Materials National Institute of Materials Science 1‐1 Namiki Tsukuba Ibaraki 305‐0044 Japan

Funding

National Institute of Information and Communications Technology · National Science and Technology Council

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