تقرير
Modulation vector of the Fulde-Ferrell-Larkin-Ovchinnikov state in CeCoIn5 revealed by high-resolution magnetostriction measurements
| العنوان: | Modulation vector of the Fulde-Ferrell-Larkin-Ovchinnikov state in CeCoIn5 revealed by high-resolution magnetostriction measurements |
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| المؤلفون: | Kittaka, Shunichiro, Kono, Yohei, Tsunashima, Kaito, Kimoto, Daisuke, Yokoyama, Makoto, Shimizu, Yusei, Sakakibara, Toshiro, Yamashita, Minoru, Machida, Kazushige |
| المصدر: | Phys. Rev. B 107, L220505 (2023) |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state is an exotic superconducting phase formed by Cooper pairs with finite center-of-mass momentum $q$. On theoretical grounds, the superconducting order parameter in the FFLO state is spatially modulated along the $q$ vector, and the emergence of an associated anisotropy is expected at the phase transition from the Abrikosov state to the FFLO state. Here, we report the results of high-resolution magnetostriction measurements for a single crystal of CeCoIn$_5$ around $B \parallel c$. We find two anomalies in the magnetostriction along the $c$ axis, parallel to the magnetic-field orientation. In sharp contrast, this $B_{\rm K}$ anomaly disappears in the magnetostriction along the $a$-axis direction, perpendicular to the magnetic-field orientation. To explain this uniaxial expansion, we suggest a possibility that the FFLO transition occurs slightly below the upper critical field, and the FFLO modulation vector parallel to the applied magnetic field gives rise to the anisotropic response. Comment: 6 pages, 5 figures (main text) + 12 pages, 10 figures (Supplemental Material), accepted for publication in Phys. Rev. B |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.107.L220505 |
| URL الوصول: | http://arxiv.org/abs/2306.12207 |
| رقم الأكسشن: | edsarx.2306.12207 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.107.L220505 |
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