Effect of pressure and chemical substitutions on the charge-density-wave in LaAgSb2

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Bud'ko, Sergey L.
Wiener, T. A.
Ribeiro, Raquel A.
Lee, Y.
Vogt, T.
Lacerda, A. H.
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American Physical Society
Canfield, Paul
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Physics and Astronomy
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Ames National Laboratory

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We present data on the crystal structure and evolution of the electrical resistivity in lightly doped La1-xRxAgSb2 (R=Gd, Y, Ce, and Nd) at ambient pressure and in LaAgSb2 under hydrostatic pressure. The upper charge density wave transition is suppressed by both doping and pressure with substitution-related disorder being the dominant mechanism for this suppression in the former case and the anisotropic pressure dependence of the unit cell dimensions (as seen in the c/a ratio) prevailing in the latter case.
This article is published as Bud’ko, S. L., T. A. Wiener, Raquel A. Ribeiro, P. C. Canfield, Y. Lee, T. Vogt, and A. H. Lacerda. "Effect of pressure and chemical substitutions on the charge-density-wave in LaAgSb 2." Physical Review B 73, no. 18 (2006): 184111. DOI: 10.1103/PhysRevB.73.184111. Copyright 2006 American Physical Society. Posted with permission.