Multiple charge density wave states and magnetism in NdPt2Si2 against the background of its nonmagnetic analog LaPt2Si2
Abstract
Results of structural, magnetic, thermodynamic, and electron transport measurements on single-crystalline NdPt2Si2 are reported. Temperature variations of crystal structure show two different charge density wave states. The structure modulation with the propagation vector q1=(0.323 ,0 ,0 ) arises below T =300 K. An additional modulation, with propagation vector q2=(0.163 ,0.163 ,0.500 ), appears below T =50 K in a first-order phase transition. This situation was found analogous to isostructural LaPt2Si2 with similar (but not identical) propagation vectors and characteristic temperatures. Nd magnetic moments order antiferromagnetically at TN=1.5 K. Temperature dependence of electrical resistivity for current j applied along the a , b , and c axes is strongly affected by the first-order transition, inducing a Fermi surface gapping.
- Publication:
-
Physical Review B
- Pub Date:
- May 2020
- DOI:
- 10.1103/PhysRevB.101.174110
- Bibcode:
- 2020PhRvB.101q4110F