Pomeranchuk instability in the nematic phase of two monolayer FeSe/SrTiO3
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2020
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| author | Tang, C. Y. Peng, X. -L. Yuan, Y. -H. Zhang, P. Phan, G. -N. Gao, S. -Y. Huang, Y. -B. Kong, L. -Y. Qian, T. Li, W. Xue, Q. -K. Wang, Z. -Q. Jiang, K. Sun, Y. -J. Ding, H. |
| author_facet | Tang, C. Y. Peng, X. -L. Yuan, Y. -H. Zhang, P. Phan, G. -N. Gao, S. -Y. Huang, Y. -B. Kong, L. -Y. Qian, T. Li, W. Xue, Q. -K. Wang, Z. -Q. Jiang, K. Sun, Y. -J. Ding, H. |
| contents | Nematicity, where electrons break rotational symmetry while preserving translational symmetry, is ubiquitous in strongly correlated quantum matters, including high-Tc cuprates and iron-based superconductors. A central question in nematicity is whether it is driven by Pomeranchuk instability in momentum space or orbital order (polarization) in real space, especially as nematicity intertwines with superconductivity. FeSe/SrTiO3 (STO), where nematicity occurs without long-range magnetic order, is an ideal platform for studying the nature and origin of the electronic nematicity. Here we present direct evidence of Pomeranchuk nematic order in two monolayer FeSe/STO using angle-resolved photoemission spectroscopy, revealing a remarkable degeneracy of dxz and dyz bands at the Brillouin zone center, but a significant band separation at the zone corner. This momentum-dependent nematicity demonstrates that nematicity in FeSe/STO originates from the Pomeranchuk instability, offering insights into the relationship between nematicity and superconductivity. Our results establish two-dimensional FeSe thin film as a powerful platform for investigating quantum physics under complex intertwinement. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2012_10136 |
| institution | arXiv |
| publishDate | 2020 |
| record_format | arxiv |
| spellingShingle | Pomeranchuk instability in the nematic phase of two monolayer FeSe/SrTiO3 Tang, C. Y. Peng, X. -L. Yuan, Y. -H. Zhang, P. Phan, G. -N. Gao, S. -Y. Huang, Y. -B. Kong, L. -Y. Qian, T. Li, W. Xue, Q. -K. Wang, Z. -Q. Jiang, K. Sun, Y. -J. Ding, H. Strongly Correlated Electrons Mesoscale and Nanoscale Physics Superconductivity Nematicity, where electrons break rotational symmetry while preserving translational symmetry, is ubiquitous in strongly correlated quantum matters, including high-Tc cuprates and iron-based superconductors. A central question in nematicity is whether it is driven by Pomeranchuk instability in momentum space or orbital order (polarization) in real space, especially as nematicity intertwines with superconductivity. FeSe/SrTiO3 (STO), where nematicity occurs without long-range magnetic order, is an ideal platform for studying the nature and origin of the electronic nematicity. Here we present direct evidence of Pomeranchuk nematic order in two monolayer FeSe/STO using angle-resolved photoemission spectroscopy, revealing a remarkable degeneracy of dxz and dyz bands at the Brillouin zone center, but a significant band separation at the zone corner. This momentum-dependent nematicity demonstrates that nematicity in FeSe/STO originates from the Pomeranchuk instability, offering insights into the relationship between nematicity and superconductivity. Our results establish two-dimensional FeSe thin film as a powerful platform for investigating quantum physics under complex intertwinement. |
| title | Pomeranchuk instability in the nematic phase of two monolayer FeSe/SrTiO3 |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics Superconductivity |
| url | https://arxiv.org/abs/2012.10136 |