Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2509.26478 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866918486239870976 |
|---|---|
| author | Kengle, Caitlin S. T. Thomas, Sean M. Movshovich, Roman Zhang, Shengzhi Choi, Eun Sang Lee, Minseong Rosa, Priscila F. S. Scheie, Allen O. |
| author_facet | Kengle, Caitlin S. T. Thomas, Sean M. Movshovich, Roman Zhang, Shengzhi Choi, Eun Sang Lee, Minseong Rosa, Priscila F. S. Scheie, Allen O. |
| contents | Quantum spin liquid (QSL) phases exist in theory, but real candidate QSL materials are often extraordinarily sensitive to structural defects which disrupt the ground state. Here, we investigate candidate triangular QSL material YbCu$_{1.14}$Se$_2$ and discover the absence of magnetic order, but also no compelling evidence of a QSL ground state due to significant structural disorder. We instead look at the results through a lens of a 2-dimensional (2D) random singlet phase. We are able to match thermodynamic measurements using a phenomenological model of a distribution of singlet formation. YbCu$_{1.14}$Se$_2$ behaves strikingly similar to other disordered triangular lattice materials, suggesting universal behavior of random singlet formation in 2D frustrated systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_26478 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Random singlet physics in exchange disordered 2D triangular YbCu$_{1.14}$Se$_2$ Kengle, Caitlin S. T. Thomas, Sean M. Movshovich, Roman Zhang, Shengzhi Choi, Eun Sang Lee, Minseong Rosa, Priscila F. S. Scheie, Allen O. Strongly Correlated Electrons Materials Science Quantum spin liquid (QSL) phases exist in theory, but real candidate QSL materials are often extraordinarily sensitive to structural defects which disrupt the ground state. Here, we investigate candidate triangular QSL material YbCu$_{1.14}$Se$_2$ and discover the absence of magnetic order, but also no compelling evidence of a QSL ground state due to significant structural disorder. We instead look at the results through a lens of a 2-dimensional (2D) random singlet phase. We are able to match thermodynamic measurements using a phenomenological model of a distribution of singlet formation. YbCu$_{1.14}$Se$_2$ behaves strikingly similar to other disordered triangular lattice materials, suggesting universal behavior of random singlet formation in 2D frustrated systems. |
| title | Random singlet physics in exchange disordered 2D triangular YbCu$_{1.14}$Se$_2$ |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2509.26478 |