Report
Flat band magnetism and helical magnetic order in Ni-doped SrCo$_2$As$_2$
| العنوان: | Flat band magnetism and helical magnetic order in Ni-doped SrCo$_2$As$_2$ |
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| المؤلفون: | Li, Yu, Liu, Zhonghao, Xu, Zhuang, Song, Yu, Huang, Yaobo, Shen, Dawei, Ma, Ni, Li, Ang, Chi, Songxue, Frontzek, Matthias, Cao, Huibo, Huang, Qingzhen, Wang, Weiyi, Xie, Yaofeng, Rong, Yan, Young, David P., DiTusa, J. F., Dai, Pengcheng |
| المصدر: | Phys. Rev. B 100, 094446 (2019) |
| سنة النشر: | 2019 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science, Condensed Matter - Superconductivity |
| الوصف: | A series of Sr(Co$_{1-x}$Ni$_x$)$_2$As$_2$ single crystals was synthesized allowing a comprehensive phase diagram with respect to field, temperature, and chemical substitution to be established. Our neutron diffraction experiments revealed a helimagnetic order with magnetic moments ferromagnetically (FM) aligned in the $ab$ plane and a helimagnetic wavevector of $q=(0,0,0.56)$ for $x$ = 0.1. The combination of neutron diffraction and angle-resolved photoemission spectroscopy (ARPES) measurements show that the tuning of a flat band with $d_{x^2-y^2}$ orbital character drives the helimagnetism and indicates the possibility of a quantum order-by-disorder mechanism. Comment: 9 pages, 12 figures, Supplementary Material available upon request, accepted by Phys. Rev. B |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.100.094446 |
| URL الوصول: | http://arxiv.org/abs/1907.09342 |
| رقم الانضمام: | edsarx.1907.09342 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.100.094446 |
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