Collapsed tetragonal phase transition in LaRu 2 P 2

Content Provider	Semantic Scholar
Author	Drachuck, Gil Sapkota, Aashish Jayasekara, Wageesha T. Kothapalli, Karunakar Bud’ko, Sergey L. Goldman, Alan I. Kreyssig, Andreas Canfield, P.
Copyright Year	2017
Abstract	The structural properties of LaRu2P2 under external pressure have been studied up to 14 GPa, employing high-energy x-ray diffraction in a diamond-anvil pressure cell. At ambient conditions, LaRu2P2 (I4/mmm) has a tetragonal structure with a bulk modulus of B=105(2) GPa and exhibits superconductivity at Tc=4.1 K. With the application of pressure, LaRu2P2 undergoes a phase transition to a collapsed tetragonal (cT) state with a bulk modulus of B=175(5) GPa. At the transition, the c-lattice parameter exhibits a sharp decrease with a concurrent increase of the a-lattice parameter. The cT phase transition in LaRu2P2 is consistent with a second-order transition, and was found to be temperature dependent, increasing from P=3.9(3) GPa at 160 K to P=4.6(3) GPa at 300 K. In total, our data are consistent with the cT transition being near, but slightly above 2 GPa at 5 K where superconductivity is suppressed. Finally, we compare the effect of physical and chemical pressure in the RRu2P2 (R = Y, La–Er, Yb) isostructural series of compounds and find them to be analogous. Disciplines Condensed Matter Physics Authors Gil Drachuck, Aashish Sapkota, Wageesha T. Jayasekara, Karunakar Kothapalli, Sergey L. Bud’ko, Alan I. Goldman, Andreas Kreyssig, and Paul C. Canfield This article is available at Iowa State University Digital Repository: http://lib.dr.iastate.edu/ameslab_manuscripts/53 PHYSICAL REVIEW B 96, 184509 (2017) Collapsed tetragonal phase transition in LaRu2P2 Gil Drachuck, Aashish Sapkota, Wageesha T. Jayasekara, Karunakar Kothapalli, Sergey L. Bud’ko, Alan I. Goldman, Andreas Kreyssig, and Paul C. Canfield Department of Physics and Astronomy and Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA (Received 13 June 2017; revised manuscript received 4 October 2017; published 10 November 2017) The structural properties of LaRu2P2 under external pressure have been studied up to 14 GPa, employing high-energy x-ray diffraction in a diamond-anvil pressure cell. At ambient conditions, LaRu2P2 (I4/mmm) has a tetragonal structure with a bulk modulus of B = 105(2) GPa and exhibits superconductivity at Tc = 4.1 K. With the application of pressure, LaRu2P2 undergoes a phase transition to a collapsed tetragonal (cT) state with a bulk modulus of B = 175(5) GPa. At the transition, the c-lattice parameter exhibits a sharp decrease with a concurrent increase of the a-lattice parameter. The cT phase transition in LaRu2P2 is consistent with a second-order transition, and was found to be temperature dependent, increasing from P = 3.9(3) GPa at 160 K to P = 4.6(3) GPa at 300 K. In total, our data are consistent with the cT transition being near, but slightly above 2 GPa at 5 K where superconductivity is suppressed. Finally, we compare the effect of physical and chemical pressure in the RRu2P2 (R = Y, La–Er, Yb) isostructural series of compounds and find them to be analogous. DOI: 10.1103/PhysRevB.96.184509
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1060&context=ameslab_manuscripts
Language	English
Access Restriction	Open
Subject Keyword	Atelectasis Diamond Digital Object Identifier Exhibits as Topic Gibbs sampling Iodine 10 MG/ML Topical Solution Lactic acid Lattice constant Linear algebra Manuscripts Modulus robot Myelofibrosis Phase Transition Population Parameter Revision procedure Scientific Publication Superconductivity Technetium X-Ray Diffraction
Content Type	Text
Resource Type	Article