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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2411.14244 |
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| _version_ | 1866912416642629632 |
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| author | Chaiyachad, Sujinda Vo, Trung-Phuc Jindata, Warakorn Singsen, Sirisak Eknapakul, Tanachat Jaisuk, Chutchawan Fevre, Patrick Le Bertran, Francois Lu, Donghui Huang, Yaobo Nakajima, Hideki Liewrian, Watchara Fongkaew, Ittipon Minar, Jan Meevasana, Worawat |
| author_facet | Chaiyachad, Sujinda Vo, Trung-Phuc Jindata, Warakorn Singsen, Sirisak Eknapakul, Tanachat Jaisuk, Chutchawan Fevre, Patrick Le Bertran, Francois Lu, Donghui Huang, Yaobo Nakajima, Hideki Liewrian, Watchara Fongkaew, Ittipon Minar, Jan Meevasana, Worawat |
| contents | Bandgaps in layered materials are critical for enabling functionalities such as tunable photodetection, efficient energy conversion, and nonlinear optical responses, which are essential for next-generation photonic and quantum devices. Gap engineering could form heterostructures with complementary materials like transition metal dichalcogenides or perovskites for multi-functional devices. Graphite, conventionally regarded as a gapless material, exhibits a bandgap of ~100 meV in nano-scale patterned highly oriented pyrolytic graphite (HOPG), as revealed by angle-resolved photoemission spectroscopy (ARPES) and Raman measurements. Our state-of-the-art calculations, incorporating photoemission matrix element effects, predict this bandgap with remarkable accuracy and attribute it to mechanical distortions introduced during patterning. This work bridges theory and experiment, providing the direct evidence of a tunable bandgap in HOPG. Beyond its fundamental significance, this finding opens new possibilities for designing materials with tailored electronic properties, enabling advancements in terahertz devices and optoelectronics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_14244 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Emergence of a Bandgap in Nano-Scale Graphite: A Computational and Experimental Study Chaiyachad, Sujinda Vo, Trung-Phuc Jindata, Warakorn Singsen, Sirisak Eknapakul, Tanachat Jaisuk, Chutchawan Fevre, Patrick Le Bertran, Francois Lu, Donghui Huang, Yaobo Nakajima, Hideki Liewrian, Watchara Fongkaew, Ittipon Minar, Jan Meevasana, Worawat Materials Science Bandgaps in layered materials are critical for enabling functionalities such as tunable photodetection, efficient energy conversion, and nonlinear optical responses, which are essential for next-generation photonic and quantum devices. Gap engineering could form heterostructures with complementary materials like transition metal dichalcogenides or perovskites for multi-functional devices. Graphite, conventionally regarded as a gapless material, exhibits a bandgap of ~100 meV in nano-scale patterned highly oriented pyrolytic graphite (HOPG), as revealed by angle-resolved photoemission spectroscopy (ARPES) and Raman measurements. Our state-of-the-art calculations, incorporating photoemission matrix element effects, predict this bandgap with remarkable accuracy and attribute it to mechanical distortions introduced during patterning. This work bridges theory and experiment, providing the direct evidence of a tunable bandgap in HOPG. Beyond its fundamental significance, this finding opens new possibilities for designing materials with tailored electronic properties, enabling advancements in terahertz devices and optoelectronics. |
| title | Emergence of a Bandgap in Nano-Scale Graphite: A Computational and Experimental Study |
| topic | Materials Science |
| url | https://arxiv.org/abs/2411.14244 |