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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2309.04201 |
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| _version_ | 1866913232844750848 |
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| author | Mertens, Lotte Brink, Jeroen van den van Wezel, Jasper |
| author_facet | Mertens, Lotte Brink, Jeroen van den van Wezel, Jasper |
| contents | Charge density waves (CDW) profoundly affect the electronic properties of materials and have an intricate interplay with other collective states, like superconductivity and magnetism. The well-known macroscopic Ginzburg-Landau theory stands out as a theoretical method for describing CDW phenomenology without requiring a microscopic description. In particular, it has been instrumental in understanding the emergence of domain structures in several CDW compounds, as well as the influence of critical fluctuations and the evolution towards or across lock-in transitions. In this context, McMillan's foundational work introduced discommensurations as the objects mediating the transition from commensurate to incommensurate CDW, through an intermediate nearly commensurate phase characterised by an ordered array of phase slips. Here, we extend the simplified, effectively one-dimensional, setting of the original model to a fully two-dimensional analysis. We find exact and numerical solutions for several types of discommensuration patterns and provide a framework for consistently describing multi-component CDW embedded in quasi-two-dimensional atomic lattices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_04201 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Two-dimensional Discommensurations: an extension to McMillan's Ginzburg-Landau Theory Mertens, Lotte Brink, Jeroen van den van Wezel, Jasper Strongly Correlated Electrons Materials Science Charge density waves (CDW) profoundly affect the electronic properties of materials and have an intricate interplay with other collective states, like superconductivity and magnetism. The well-known macroscopic Ginzburg-Landau theory stands out as a theoretical method for describing CDW phenomenology without requiring a microscopic description. In particular, it has been instrumental in understanding the emergence of domain structures in several CDW compounds, as well as the influence of critical fluctuations and the evolution towards or across lock-in transitions. In this context, McMillan's foundational work introduced discommensurations as the objects mediating the transition from commensurate to incommensurate CDW, through an intermediate nearly commensurate phase characterised by an ordered array of phase slips. Here, we extend the simplified, effectively one-dimensional, setting of the original model to a fully two-dimensional analysis. We find exact and numerical solutions for several types of discommensuration patterns and provide a framework for consistently describing multi-component CDW embedded in quasi-two-dimensional atomic lattices. |
| title | Two-dimensional Discommensurations: an extension to McMillan's Ginzburg-Landau Theory |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2309.04201 |