Multiple charge density wave states and magnetism in NdPt2Si2 against the background of its nonmagnetic analog LaPt2Si2

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...

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Bibliographic Details
Published in:Physical review. B 2020-05, Vol.101 (17), p.1
Main Authors: Falkowski, M, Doležal, P, Duverger-Nédellec, E, Chamoreau, L-M, té, J, Andreev, A V, Havela, L
Format: Article
Language:English
Subjects:
Antiferromagnetism
Charge density waves
Crystal structure
Electron transport
Fermi surfaces
Magnetic moments
Magnetism
Modulation
Neodymium
Phase transitions
Propagation
Single crystals
Temperature dependence
Wave propagation
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Summary: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.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.101.174110