skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Collapsed tetragonal phase transition in LaRu 2 P 2

Abstract

Here, the structural properties of LaRu 2P 2 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, LaRu 2P 2 (I4/ mmm) has a tetragonal structure with a bulk modulus of B = 105(2) GPa and exhibits superconductivity at T c = 4.1 K. With the application of pressure, LaRu 2P 2 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 LaRu 2P 2 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 RRu 2P 2 ( R = Y, La–Er, Yb) isostructural series of compounds and find them to be analogous.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1410346
Alternate Identifier(s):
OSTI ID: 1408263
Report Number(s):
IS-J-9507
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
GBMF4411; AC02-07CH111358; AC02-06CH11357; NA0001974; FG02-94ER14466; EAR-11-57758; EAR-1128799
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 18; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Drachuck, Gil, Sapkota, Aashish, Jayasekara, Wageesha T., Kothapalli, Karunakar, Bud'ko, Sergey L., Goldman, Alan I., Kreyssig, Andreas, and Canfield, Paul C. Collapsed tetragonal phase transition in LaRu2P2. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.184509.
Drachuck, Gil, Sapkota, Aashish, Jayasekara, Wageesha T., Kothapalli, Karunakar, Bud'ko, Sergey L., Goldman, Alan I., Kreyssig, Andreas, & Canfield, Paul C. Collapsed tetragonal phase transition in LaRu2P2. United States. doi:10.1103/PhysRevB.96.184509.
Drachuck, Gil, Sapkota, Aashish, Jayasekara, Wageesha T., Kothapalli, Karunakar, Bud'ko, Sergey L., Goldman, Alan I., Kreyssig, Andreas, and Canfield, Paul C. Fri . "Collapsed tetragonal phase transition in LaRu2P2". United States. doi:10.1103/PhysRevB.96.184509.
@article{osti_1410346,
title = {Collapsed tetragonal phase transition in LaRu2P2},
author = {Drachuck, Gil and Sapkota, Aashish and Jayasekara, Wageesha T. and Kothapalli, Karunakar and Bud'ko, Sergey L. and Goldman, Alan I. and Kreyssig, Andreas and Canfield, Paul C.},
abstractNote = {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.},
doi = {10.1103/PhysRevB.96.184509},
journal = {Physical Review B},
number = 18,
volume = 96,
place = {United States},
year = {Fri Nov 10 00:00:00 EST 2017},
month = {Fri Nov 10 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 10, 2018
Publisher's Version of Record

Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides
journal, September 1976