The field of condensed matter physics, which overlaps with chemistry, materials science, and engineering, attempts to understand the physical properties of materials. This includes a broad range of topics including but not limited to:

•  Structural, Electronic, Dielectric, Electrical, Magnetic, and Optical Properties of Materials;
• Novel Quantum Materials – superconductors, topological insulators, Weyl semimetal,s and quantum spin liquids;
• Magnetoelectric and multiferroic materials;
• 2D and 3D Magnetic Systems;
• Quantum Hall Effect;
• Energetic Materials
• Semiconductors, Photovoltaics, Optoelectronics and Photonics;
• Magneto-Transports, Magnetic Interfaces and Spintronics;
• Complex Oxides and Emergent Phenomena.

The interaction between itinerant electrons and magnetism is of particular interest in compounds within which the ordered moments are compensated.  We have studied EuAuSb, in which triangular Eu layers are separated by hexagonally ordered layers of Au and Sb.  Our neutron diffraction study [1] has demonstrated that the individual Eu layers order ferromagnetically, while the spin directions of neighboring layers rotate in a helical fashion with a unit cell of approximately 3 Eu layers.  This order is consistent with competing RKKY interlayer exchange couplings.   It also produces a Zeeman field that leads to spin-splitting of Fermi pockets.  These results and more will be discussed.

1. J. Sears, J. Yao, Z. Hu, W. Tian, N. Aryal, W. Yin, A.M. Tsvelik, I.A. Zaliznyak, Q. Li, and J.M. Tranquada, “EuAuSb: An incommensurate helical variation on an altermagnet” (to be submitted).