Anomalous impurity-induced charge modulations in black phosphorus
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866910035116818432 |
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| author | Lee, Byeongin Bang, Junho Banerjee, Sayan Sobral, João Augusto Choi, Young Woo Felser, Claudia Scheurer, Mathias S. Ge, Jian-Feng Cho, Doohee |
| author_facet | Lee, Byeongin Bang, Junho Banerjee, Sayan Sobral, João Augusto Choi, Young Woo Felser, Claudia Scheurer, Mathias S. Ge, Jian-Feng Cho, Doohee |
| contents | We observe anomalous charge modulations induced by ionized indium impurities on the surface of the semiconductor black phosphorus by scanning tunneling microscopy (STM). When the impurities are switched into a negatively charged state by the STM tip, periodic charge modulations emerge around the impurity center, but strictly confined by the nanoscale impurity potential. These modulations form a distorted triangular pattern, whose periodicity remains unchanged in a wide range of positive bias. Furthermore, these local charge orders exhibit an anisotropy opposite to that expected based on the anisotropy of the Fermi surface, challenging a simple band-structure interpretation. Our experiment demonstrates the possibility of creating and manipulating macroscopic charge orders through impurity engineering. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_04791 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Anomalous impurity-induced charge modulations in black phosphorus Lee, Byeongin Bang, Junho Banerjee, Sayan Sobral, João Augusto Choi, Young Woo Felser, Claudia Scheurer, Mathias S. Ge, Jian-Feng Cho, Doohee Strongly Correlated Electrons Mesoscale and Nanoscale Physics We observe anomalous charge modulations induced by ionized indium impurities on the surface of the semiconductor black phosphorus by scanning tunneling microscopy (STM). When the impurities are switched into a negatively charged state by the STM tip, periodic charge modulations emerge around the impurity center, but strictly confined by the nanoscale impurity potential. These modulations form a distorted triangular pattern, whose periodicity remains unchanged in a wide range of positive bias. Furthermore, these local charge orders exhibit an anisotropy opposite to that expected based on the anisotropy of the Fermi surface, challenging a simple band-structure interpretation. Our experiment demonstrates the possibility of creating and manipulating macroscopic charge orders through impurity engineering. |
| title | Anomalous impurity-induced charge modulations in black phosphorus |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2512.04791 |