Entropy-assisted, long-period stacking of honeycomb layers in an AlB2-type silicide

Abstract

Configurational entropy can impact crystallization processes, tipping the scales between structures of nearly equal internal energy. Using alloyed single crystals of Gd2PdSi3 in the AlB2-type structure, we explore the formation of complex layer sequences made from alternating, two-dimensional triangular and honeycomb slabs. A four-period and an eight-period stacking sequence are found to be very close in internal energy, the latter being favored by entropy associated with covering the full configuration space of interlayer bonds. Possible consequences of polytype formation on magnetism in Gd2PdSi3 are discussed.

16 pages, 4 figures

References in corpus (4)

• Nanometric square skyrmion lattice in a centrosymmetric tetragonal magnet
• Noncoplanar multiple-$Q$ spin textures by itinerant frustration: Effects of single-ion anisotropy and bond-dependent anisotropy
• Zoology of multiple-Q spin textures in a centrosymmetric tetragonal magnet with itinerant electrons
• High-field depinned phase and planar Hall effect in skyrmion-host Gd${}_2$PdSi${}_3$

Cited by in corpus (2)

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