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Title: Collapsed tetragonal phase transition in LaRu 2 P 2

Journal Article · · Physical Review B

Here, 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.

Research Organization:
Ames Lab., Ames, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
GBMF4411; AC02-07CH111358; AC02-06CH11357; NA0001974; FG02-94ER14466; EAR-11-57758; EAR-1128799
OSTI ID:
1410346
Alternate ID(s):
OSTI ID: 1408263
Report Number(s):
IS-J-9507; PRBMDO
Journal Information:
Physical Review B, Vol. 96, Issue 18; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

References (37)

The laser micro-machining system for diamond anvil cell experiments and general precision machining applications at the High Pressure Collaborative Access Team journal July 2015
Suppression of electron correlations in the collapsed tetragonal phase of Ca Fe 2 As 2 under ambient pressure demonstrated by As 75 NMR/NQR measurements journal March 2014
Superconducting LaRu2P2 and other alkaline earth and rare earth metal ruthenium and osmium phosphides and arsenides with ThCr2Si2 structure journal July 1987
Use of frit-disc crucibles for routine and exploratory solution growth of single crystalline samples journal December 2015
Pressure-induced half-collapsed-tetragonal phase in CaKFe 4 As 4 journal October 2017
Superconductivity up to 29 K in SrFe 2 As 2 and BaFe 2 As 2 at high pressures journal December 2008
Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides journal September 1976
Pressure-induced transition to the collapsed tetragonal phase in BaC r 2 A s 2 journal April 2017
Collapsed tetragonal phase and superconductivity of BaFe 2 As 2 under high pressure journal October 2010
Structural, magnetic and superconducting phase transitions in CaFe2As2 under ambient and applied pressure journal May 2009
Hydrostatic-pressure tuning of magnetic, nonmagnetic, and superconducting states in annealed Ca(Fe 1 x Co x ) 2 As 2 journal December 2012
High-temperature solution growth of intermetallic single crystals and quasicrystals journal May 2001
Pressure-induced volume-collapsed tetragonal phase of CaFe 2 As 2 as seen via neutron scattering journal November 2008
First- and second-order phase transitions in ternary europium phosphides with ThCr2Si2-type structure journal July 1998
Online remote control systems for static and dynamic compression and decompression using diamond anvil cells journal July 2015
Conventional empirical law reverses in the phase transitions of 122-type iron-based superconductors journal November 2014
Bulk Electronic Structure of Superconducting LaRu 2 P 2 Single Crystals Measured by Soft-X-Ray Angle-Resolved Photoemission Spectroscopy journal June 2012
Complete pressure-dependent phase diagrams for SrFe 2 As 2 and BaFe 2 As 2 journal June 2009
Superelasticity and cryogenic linear shape memory effects of CaFe2As2 journal October 2017
Formation of collapsed tetragonal phase in EuCo 2 As 2 under high pressure journal October 2010
FeAs-Based Superconductivity: A Case Study of the Effects of Transition Metal Doping on BaFe 2 As 2 journal August 2010
Pressure Induced Enhancement of Superconductivity in LaRu2P2 journal April 2016
Absence of superconductivity in single-phase CaFe 2 As 2 under hydrostatic pressure journal January 2009
First-principles investigation of superconductivity in the body-centred tetragonal journal June 2016
Growth of single crystals from metallic fluxes journal June 1992
Making and Breaking Bonds in the Solid State: The ThCr 2 Si 2 Structure journal September 1985
High-temperature superconductivity in iron-based materials journal August 2010
Symmetry-preserving lattice collapse in tetragonal SrFe 2 x Ru x As 2 ( x = 0 , 0.2 ): A combined experimental and theoretical study journal August 2011
Superconductivity in iron compounds journal December 2011
Control of magnetic, nonmagnetic, and superconducting states in annealed Ca(Fe 1 x Co x ) 2 As 2 journal June 2012
Crystallographic phase transition within the magnetically ordered state of Ce 2 Fe 17 journal August 2007
Pressure-induced shift of T c and structural transition in “122” type pnictide superconductor Ca 0.34 Na 0.66 Fe 2 As 2 journal July 2016
Pressure-induced collapsed-tetragonal phase in SrCo 2 As 2 journal December 2015
Dramatic changes in the electronic structure upon transition to the collapsed tetragonal phase in CaFe 2 As 2 journal January 2014
The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides journal October 2010
Isotropic superconductivity in LaRu 2 P 2 with the ThCr 2 Si 2 -type structure journal October 2010
Hydrostatic high-pressure studies to 25 GPa on the model superconducting pnictide LaRu 2 P 2 journal May 2014

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New materials physics journal November 2019

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