Document Type
Article
Publication Date
9-30-2019
Abstract
A series of Sr(Co1-xNix)2As2 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 aligned in the ab plane and a helimagnetic wave vector of q=(0,0,0.56) for x=0.1. The combination of neutron diffraction and angle-resolved photoemission spectroscopy measurements shows that the tuning of a flat band with dx2-y2 orbital character drives the helimagnetism and indicates the possibility of a quantum order-by-disorder mechanism.
Publication Source (Journal or Book title)
Physical Review B
Recommended Citation
Li, Y., Liu, Z., Xu, Z., Song, Y., Huang, Y., Shen, D., Ma, N., Li, A., Chi, S., Frontzek, M., Cao, H., Huang, Q., Wang, W., Xie, Y., Zhang, R., Rong, Y., Shelton, W., Young, D., Ditusa, J., & Dai, P. (2019). Flat-band magnetism and helical magnetic order in Ni-doped SrCo2As2. Physical Review B, 100 (9) https://doi.org/10.1103/PhysRevB.100.094446
