Abstract
The hidden order phase in URu2Si2 is highly sensitive to electronic doping. A special interest in silicon-to-phosphorus substitution is due to the fact that it may allow one, in part, to isolate the effects of tuning the chemical potential from the complexity of the correlated f and d electronic states. We investigate the new antiferromagnetic phase that is induced in URu2Si2-xPx at x 0.27. Time-of-flight neutron diffraction of a single crystal (x=0.28) reveals c-axis collinear qm=(12,12,12) magnetic order with localized magnetic moments (∼2.1-2.6μB). This points to an unexpected analogy between the (Si,P) and (Ru,Rh) substitution series. Through further comparisons with other tuning studies of URu2Si2, we are able to delineate the mechanisms by which silicon-to-phosphorus substitution affects the system. In particular, both the localization of itinerant 5f electrons as well as the choice of qm appear to be consequences of the increase in chemical potential. Further, enhanced exchange interactions are induced by chemical pressure and lead to magnetic order, in which an increase in interlayer spacing may play a special role.
| Original language | English |
|---|---|
| Article number | 214403 |
| Journal | Physical Review B |
| Volume | 103 |
| Issue number | 21 |
| DOIs | |
| State | Published - Jun 1 2021 |
Funding
Work performed by R.B. and A.G. at the National High Magnetic Field Laboratory was supported by National Science Foundation Cooperative Agreement No. DMR-1644779 and the State of Florida. The synthesis of crystalline materials was supported by the Center for Actinide Scienceand Technology (CAST), an Energy Frontier Research Center (EFRC) funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), under Award No. DE-SC0016568. Work by M.J. at Los Alamos National Laboratory was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Science and Engineering, under project “Quantum Fluctuations in Narrow-Band Systems.” Part of this research was carried out at the ISIS Neutron Facility, an institution of the UK Science and Technology Research Council (STFC). Research conducted at SNS (TOPAZ instrument) was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. M.C.R. is grateful for fellowships provided by the LANL Director's Fund and the Alexander von Humboldt Foundation. Work by M.C.R. at TU Dresden was supported by the Deutsche Forschungsgemeinschaft through the CRC 1143 and the Würzburg-Dresden Cluster of Excellence ct.qmat (EXC 2147, Project ID 390858490).
| Funders | Funder number |
|---|---|
| Center for Actinide Scienceand Technology | |
| Energy Frontier Research Center | |
| Scientific User Facilities Division | |
| State of Florida | |
| National Science Foundation | DMR-1644779 |
| U.S. Department of Energy | |
| Alexander von Humboldt-Stiftung | |
| Office of Science | |
| Basic Energy Sciences | DE-SC0016568 |
| Los Alamos National Laboratory | |
| Division of Materials Sciences and Engineering | |
| Deutsche Forschungsgemeinschaft | EXC 2147, CRC 1143, 390858490 |