@article{ISI:000501813300001, abstract = {We have investigated the superconducting state of HfIrSi using magnetization, specific heat, muon spin rotation and relaxation (SR) measurements. Superconductivity was observed at K in both specific heat and magnetization measurements. From an analysis of the transverse-field SR data, it is clear that the temperature variation of superfluid density is well fitted by an isotropic Bardeen?Cooper?Schrieffer (BCS) type s-wave gap structure. The superconducting carrier density m(?3), the magnetic penetration depth, nm, and the effective mass, , were calculated from the TF-SR data. Zero-field SR data for HfIrSi reveal the absence of any spontaneous magnetic moments below , indicating that time-reversal symmetry (TRS) is preserved in the superconducting state of HfIrSi. Theoretical investigations suggest that the Hf and Ir atoms hybridize strongly along the c-axis, and that this is responsible for the strong three-dimensionality of this system which screens the Coulomb interaction. As a result, despite the presence of d-electrons in HfIrSi, these correlation effects are weakened, making the electron-phonon coupling more important.}, article-number = {085601}, author = {Bhattacharyya, A. and Panda, K. and Adroja, D. T. and Kase, N. and Biswas, P. K. and Saha, Surabhi and Das, Tanmoy and Lees, M. R. and Hillier, A. D.}, doi = {10.1088/1361-648X/ab549e}, eissn = {1361-648X}, issn = {0953-8984}, journal = {JOURNAL OF PHYSICS-CONDENSED MATTER}, month = {FEB 20}, number = {8}, orcid-numbers = {Hillier, Adrian/0000-0002-2391-8581 Biswas, Pabitra Kumar/0000-0002-7367-5960 Panda, Kartik/0000-0003-4305-9566 Lees, Martin/0000-0002-2270-2295 BHATTACHARYYA, AMITAVA/0000-0002-8037-0487}, researcherid-numbers = {Hillier, Adrian/AAN-7270-2020 Hillier, Adrian/A-9331-2015 Lees, Martin/D-9584-2013 }, times-cited = {0}, title = {Investigation of superconducting gap structure in HfIrSi using muon spin relaxation/rotation}, unique-id = {ISI:000501813300001}, volume = {32}, year = {2020} }