Tuning Magnetic and Optical Properties in MnxZn1-xPS3 Single Crystals by the Alloying Composition
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arXiv
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| Auteurs principaux: | , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866914749140172800 |
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| author | Harchol, Adi Zuri, Shahar Ritov, Esther Horani, Faris Rybak, Miłosz Woźniak, Tomasz Eyal, Anna Amouyal, Yaron Birowska, Magdalena Lifshitz, Efrat |
| author_facet | Harchol, Adi Zuri, Shahar Ritov, Esther Horani, Faris Rybak, Miłosz Woźniak, Tomasz Eyal, Anna Amouyal, Yaron Birowska, Magdalena Lifshitz, Efrat |
| contents | The exploration of two-dimensional (2D) antiferromagnetic (AFM) materials has shown great promise and interest in tuning the magnetic and electronic properties as well as studying magneto-optical effects. The current work investigates the control of magneto-optical interactions in alloyed MnxZn1-xPS3 lamellar semiconductor single crystals, with the Mn/Zn ratio regulating the coupling strength. Magnetic susceptibility results show a retention of AFM order followed by a decrease in Néel temperatures down to ~ 40% Mn concentration, below which a paramagnetic behavior is observed. Absorption measurements reveal an increase in bandgap energy with higher Zn(II) concentration, and the presence of Mn(II) d-d transition below the absorption edge. DFT+U approach qualitatively explained the origin and the position of the experimentally observed mid band-gap states in pure MnPS3, and corresponding peaks visible in the alloyed systems MnxZn1-xPS3. Accordingly, emission at 1.3 eV in all alloyed compounds results from recombination from a 4T1g Mn(II) excited state to a hybrid p-d state at the valence band. Most significant, temperature-dependent photoluminescence (PL) intensity trends demonstrate strong magneto-optical coupling in compositions with x > 0.65. This study underscores the potential of tailored alloy compositions as a means to control magnetic and optical properties in 2D materials, paving the way for advances in spin-based technologies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_07643 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Tuning Magnetic and Optical Properties in MnxZn1-xPS3 Single Crystals by the Alloying Composition Harchol, Adi Zuri, Shahar Ritov, Esther Horani, Faris Rybak, Miłosz Woźniak, Tomasz Eyal, Anna Amouyal, Yaron Birowska, Magdalena Lifshitz, Efrat Materials Science Chemical Physics The exploration of two-dimensional (2D) antiferromagnetic (AFM) materials has shown great promise and interest in tuning the magnetic and electronic properties as well as studying magneto-optical effects. The current work investigates the control of magneto-optical interactions in alloyed MnxZn1-xPS3 lamellar semiconductor single crystals, with the Mn/Zn ratio regulating the coupling strength. Magnetic susceptibility results show a retention of AFM order followed by a decrease in Néel temperatures down to ~ 40% Mn concentration, below which a paramagnetic behavior is observed. Absorption measurements reveal an increase in bandgap energy with higher Zn(II) concentration, and the presence of Mn(II) d-d transition below the absorption edge. DFT+U approach qualitatively explained the origin and the position of the experimentally observed mid band-gap states in pure MnPS3, and corresponding peaks visible in the alloyed systems MnxZn1-xPS3. Accordingly, emission at 1.3 eV in all alloyed compounds results from recombination from a 4T1g Mn(II) excited state to a hybrid p-d state at the valence band. Most significant, temperature-dependent photoluminescence (PL) intensity trends demonstrate strong magneto-optical coupling in compositions with x > 0.65. This study underscores the potential of tailored alloy compositions as a means to control magnetic and optical properties in 2D materials, paving the way for advances in spin-based technologies. |
| title | Tuning Magnetic and Optical Properties in MnxZn1-xPS3 Single Crystals by the Alloying Composition |
| topic | Materials Science Chemical Physics |
| url | https://arxiv.org/abs/2404.07643 |