Effects of bonding on superconductivity in Sr(Ni<sub>1−x</sub>Rh<sub>x</sub>)<sub>2</sub>P<sub>2</sub> single crystals
ORAL
Abstract
Bond formation and bond breaking in crystalline intermetallic solids can strongly impact properties associated with delocalized electrons, such as itinerant magnetism and superconductivity. This has been observed on numerous occasions in materials with collapsed tetragonal transitions [1,2,3]. Although SrNi2P2 adopts the common ThCr2Si2 structure for T ≥ 325 K, being in an uncollapsed tetragonal (ucT) state, it is a special case for the ThCr2Si2 class: on cooling below 325 K it adopts a one-third collapsed orthorhombic (tcO) phase where one out of every three P-rows bond across the Sr layers [4,5]. It is also known for exhibiting bulk superconductivity at 1.4 K at ambient pressure [6]. We find that Rh substitution in SrNi2P2 causes a rapid decrease of the one-third collapse transition temperature, as well as an enhancement of superconductivity.
[1] S. Jia et al., Nature Phys. 7, 207 (2011).
[2] U. S. Kaluarachchi et al., Phys. Rev. B 96, 140501(R) (2017).
[3] P. C. Canfield et al., Physica C Supercond. 469, 404 (2009).
[4] V. Keimes et al., Z Anorg Allg Chem 623, 1699 (1997).
[5] J. Schmidt et al., Phys. Rev. B 108, 174415 (2023).
[6] F. Ronning et al., Phys. Rev. B 79, 134507 (2009).
[1] S. Jia et al., Nature Phys. 7, 207 (2011).
[2] U. S. Kaluarachchi et al., Phys. Rev. B 96, 140501(R) (2017).
[3] P. C. Canfield et al., Physica C Supercond. 469, 404 (2009).
[4] V. Keimes et al., Z Anorg Allg Chem 623, 1699 (1997).
[5] J. Schmidt et al., Phys. Rev. B 108, 174415 (2023).
[6] F. Ronning et al., Phys. Rev. B 79, 134507 (2009).
*Work was done at Ames National Laboratory and was supported by the U.S. Department of Energy, Office of Basic Energy Science, Division of Materials Sciences and Engineering. Ames National Laboratory is operated for the U.S. Department of Energy by Iowa State University under Contract No. DE-AC02- 07CH11358.
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Presenters
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Juan Schmidt
- Ames National Laboratory
- Ames National Laboratory, and Department of Physics and Astronomy, Iowa State University