Bhattacharyya, A., Adroja, D. T., Biswas, P. K., Sato, Y. J., Lees, Martin R., Aoki, D. and Hillier, A. D. (2019) Ir 5d-band derived superconductivity in LaIr3. Journal of Physics: Condensed Matter, 32 (6). 065602. doi:10.1088/1361-648X/ab4389 ISSN 0953-8984.

Preview

PDF WRAP-Ir-5d-band-derived-superconductivity-LaIr3-Lees-2019.pdf - Accepted Version - Requires a PDF viewer. Download (1916Kb) | Preview

Request Changes to record.

Abstract

The superconducting properties of rhombohedral LaIr3 were examined using susceptibility, resistivity, heat capacity, and zero-field (ZF) and transverse-field (TF) muon spin relaxation and rotation (μSR) measurements. The susceptibility and resistivity measurements confirm a superconducting transition below T_C = 2.5(1) K. Two successive transitions are observed in the heat capacity data, one at T_C = 2.5 K and a second at 1.2 K below T_C. The heat capacity jump is ΔC/γT_C ~ 1.0, which is lower than 1.43 expected for Bardeen–Cooper–Schrieffer (BCS) weak-coupling limit. TF-μSR measurements reveal a fully gapped s-wave superconductivity with 2Δ(0)/k_BT_C = 3.31(8), which is small compared to the BCS value of 3.56, suggesting weak-coupling superconductivity. The magnetic penetration depth, λ_L(0), estimated from TF-μSR gives λ_L(0) = 386(3) nm, a superconducting carrier density n_s = 2.9(1) × 10^27 carriers m^−3 and a carrier effective-mass enhancement factor m* = 1.53(1)me. ZF-μSR data show no evidence for any spontaneous magnetic fields below TC, which demonstrates that time-reversal symmetry is preserved in the superconducting state of LaIr3.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Superconductors, Ternary, Superconductivity, Muons, Muon spin rotation
Journal or Publication Title:	Journal of Physics: Condensed Matter
Publisher:	Institute of Physics
ISSN:	0953-8984
Official Date:	7 November 2019
Dates:	Date Event 7 November 2019 Published 11 September 2019 Accepted 6 September 2019 Modified 2 July 2019 Submitted
Volume:	32
Number:	6
Article Number:	065602
DOI:	10.1088/1361-648X/ab4389
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Copyright Holders:	Institute of Physics Publishing Ltd
Date of first compliant deposit:	12 February 2020
Date of first compliant Open Access:	7 November 2020
RIOXX Funder/Project Grant:	Project/Grant ID RIOXX Funder Name Funder ID DST/INSPIRE/04/2015/000169 India.‏ ‎Department of Science and Technology http://viaf.org/viaf/139476328 CMPC-0910 [STFC] Science and Technology Facilities Council http://dx.doi.org/10.13039/501100000271 UNSPECIFIED Science and Technology Commission of Putuo District http://dx.doi.org/10.13039/501100012592 UNSPECIFIED [JSPS] Japan Society for the Promotion of Science http://dx.doi.org/10.13039/501100001691
Open Access Version:	ArXiv

Request changes or add full text files to a record

Repository staff actions (login required)

View Item

Downloads