Thermodynamic stability of twisted domains in AgCrSe$_{2}$ thin films grown on lattice-matched YSZ(111) substrate
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866910247630667776 |
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| author | Sato, Haruto Mihara, Kota Inamura, Kenshin Tajima, Yusuke Kudo, Kazutaka Matsuno, Jobu Shiogai, Junichi |
| author_facet | Sato, Haruto Mihara, Kota Inamura, Kenshin Tajima, Yusuke Kudo, Kazutaka Matsuno, Jobu Shiogai, Junichi |
| contents | Control of structural domains in epitaxial thin films of functional materials is a fundamental technique to utilize their intrinsic physical and chemical properties in solid-state devices. In this study, we report on suppression of twisted-domain formation in thin-film growth of polar magnetic semiconductor AgCrSe$_{2}$ using pulsed-laser deposition. In exploring concomitant optimized growth temperature and Ag/Cr composition ratio of supply, we find the critical growth temperature ($T\mathrm{_{sub}}$) for obtaining single 60$^{\circ}$ domain in c-axis oriented AgCrSe$_{2}$ thin film on a lattice-matched (111) plane of the yttria-stabilized zirconia substrate. At temperatures below and above the critical $T\mathrm{_{sub}}$, metastable 0$^{\circ}$ domain in addition to the 60$^{\circ}$ domain emerges, indicating delicate energy balance of thermodynamic stability for obtaining the single-domain structure. Surface structural analysis using time-of-flight low-energy atom scattering spectroscopy reveals the presence of two polar orientations along $+Z$ and $-Z$ directions. These findings provide valuable insights into the thin-film growth mechanisms for a family of two-dimensional compounds with rhombohedral lattices. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2605_23313 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Thermodynamic stability of twisted domains in AgCrSe$_{2}$ thin films grown on lattice-matched YSZ(111) substrate Sato, Haruto Mihara, Kota Inamura, Kenshin Tajima, Yusuke Kudo, Kazutaka Matsuno, Jobu Shiogai, Junichi Materials Science Strongly Correlated Electrons Control of structural domains in epitaxial thin films of functional materials is a fundamental technique to utilize their intrinsic physical and chemical properties in solid-state devices. In this study, we report on suppression of twisted-domain formation in thin-film growth of polar magnetic semiconductor AgCrSe$_{2}$ using pulsed-laser deposition. In exploring concomitant optimized growth temperature and Ag/Cr composition ratio of supply, we find the critical growth temperature ($T\mathrm{_{sub}}$) for obtaining single 60$^{\circ}$ domain in c-axis oriented AgCrSe$_{2}$ thin film on a lattice-matched (111) plane of the yttria-stabilized zirconia substrate. At temperatures below and above the critical $T\mathrm{_{sub}}$, metastable 0$^{\circ}$ domain in addition to the 60$^{\circ}$ domain emerges, indicating delicate energy balance of thermodynamic stability for obtaining the single-domain structure. Surface structural analysis using time-of-flight low-energy atom scattering spectroscopy reveals the presence of two polar orientations along $+Z$ and $-Z$ directions. These findings provide valuable insights into the thin-film growth mechanisms for a family of two-dimensional compounds with rhombohedral lattices. |
| title | Thermodynamic stability of twisted domains in AgCrSe$_{2}$ thin films grown on lattice-matched YSZ(111) substrate |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2605.23313 |