Abstract
Using single-crystal neutron and X-ray diffraction, we discovered a charge density wave (CDW) below 320 K, which accounts for the long-sought origin of the heat capacity and resistivity anomalies in UPt2Si2. The modulation wave vector, Qmod, is intriguingly similar to the incommensurate wave vector of URu2Si2. Qmod shows an unusual temperature dependence, shifting from commensurate to incommensurate position upon cooling and becoming locked at aproximately (0.42 0 0) near 180 K. Bulk measurements indicate a crossover toward a correlated coherent state around the same temperature, suggesting an interplay between the CDW and Kondo-lattice-like coherence before coexisting antiferromagnetic order sets in at TN=35 K.
| Original language | English |
|---|---|
| Article number | 041112 |
| Journal | Physical Review B |
| Volume | 102 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jul 15 2020 |
Funding
We thank K.-B. Lee and D. Y. Kim for helpful discussion. The sample synthesis was supported by Stefan Süllow whose work has been supported by the DFG under Contract No. SU229/1. Work at Brookhaven National Laboratory was supported by Office of Basic Energy Sciences (BES), Division of Materials Sciences and Engineering, US Department of Energy (DOE), under Contract No. DE-SC0012704. A portion of this research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. Research conducted at CHESS is supported by the National Science Foundation via Awards No. DMR-1332208 and No. DMR-1829070. We thank K.-B. Lee and D. Y. Kim for helpful discussion. The sample synthesis was supported by Stefan Süllow whose work has been supported by the DFG under Contract No. SU229/1. Work at Brookhaven National Laboratory was supported by Office of Basic Energy Sciences (BES), Division of Materials Sciences and Engineering, US Department of Energy (DOE), under Contract No. DE-SC0012704. A portion of this research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. Research conducted at CHESS is supported by the National Science Foundation via Awards No. DMR-1332208 and No. DMR-1829070.
