Collapsed tetragonal phase transition in
Abstract
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.
- Authors:
-
- Ames Lab. and Iowa State Univ., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Lab., 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:
- 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. https://doi.org/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. https://doi.org/10.1103/PhysRevB.96.184509. https://www.osti.gov/servlets/purl/1410346.
@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}
}
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