33 citations · 163 across the 20 of their papers we have counts for
21 papers
Magneto-optical study of Nb thin films for superconducting qubits
Amlan Datta, Kamal R. Joshi, Sunil Ghimire +7
Among the recognized sources of decoherence in superconducting qubits, the spatial inhomogeneity of the superconducting state and the possible presence of magnetic-flux vortices re…
Effect of metal encapsulation on bulk superconducting properties of niobium thin films used in qubits
Amlan Datta, Kamal R. Joshi, Sunil Ghimire +18
Niobium metal occupies nearly 100\% of the volume of a typical 2D transmon device. While the aluminum Josephson junction is of utmost importance, maintaining quantum coherence acro…
Identifying Materials-Level Sources of Performance Variation in Superconducting Transmon Qubits
Akshay A. Murthy, Mustafa Bal, Michael J. Bedzyk +46
The Superconducting Materials and Systems (SQMS) Center, a DOE National Quantum Information Science Research Center, has conducted a comprehensive and coordinated study using super…
Conventional s-wave superconductivity and hidden peak effect in single crystals of MoGa superconductor
Sunil Ghimire, Kyuil Cho, Kamal R. Joshi +4
London and Campbell penetration depths were measured in single crystals of the endohedral gallide cluster superconductor, MoGa. The full temperature range superfluid d…
Single-gap Isotropic wave Superconductivity in Single Crystals
Sunil Ghimire, Kamal R. Joshi, Elizabeth H. Krenkel +5
London, , and Campbell, , penetration depths were measured in single crystals of a topological superconductor candidate . At low temperatures, $λ…
The nontrivial effects of annealing on superconducting properties of Nb single crystals
Amlan Datta, Kamal R. Joshi, Giulia Berti +9
The effect of annealing on the superconducting properties of niobium single crystals cut from the same master boule was studied by local and global magnetic measurements, as well a…
Creep-enhanced vortex pinning revealed through nonmonotonic relaxation of the Campbell length
Sunil Ghimire, Filippo Gaggioli, Kamal R. Joshi +9
We study the effects of flux creep on the linear AC response of the vortex lattice in single crystals CaIrSn by measuring the Campbell penetration depth, $λ_{\rm \sc…
Electron irradiation reveals robust fully gapped superconductivity in LaNiGa
S. Ghimire, K. R. Joshi, E. H. Krenkel +8
The effects of 2.5 MeV electron irradiation were studied in the superconducting phase of single crystals of LaNiGa, using measurements of electrical transport and radio-frequen…
Robust superconductivity and the suppression of charge-density wave in single crystals at ambient pressure
Elizabeth H. Krenkel, Makariy A. Tanatar, Sunil Ghimire +4
Single crystals of Ca(IrRh)Sn (3-4-13) were synthesized by flux growth and characterized by X-ray diffraction, EDX, magnetization, resistivity and radio…
Anisotropic multiband superconductivity in 2M-WS probed by controlled disorder
Sunil Ghimire, Kamal R. Joshi, Marcin Konczykowski +10
The intrinsically superconducting Dirac semimetal 2M-WS is a promising candidate to realize proximity-induced topological superconductivity in its protected surface states. A…
Quasiparticle spectroscopy in technologically-relevant niobium using London penetration depth measurements
Sunil Ghimire, Kamal R. Joshi, Amlan Datta +10
London penetration depth was measured in niobium foils, thin films, single crystals, and superconducting radio-frequency (SRF) cavity pieces cut out from different places. The low-…
Magnetism and phase diagrams of Na and Ag substituted EuCdAs
Brinda Kuthanazhi, Kamal R. Joshi, Sunil Ghimire +7
EuCdAs is an antiferromagnetic semimetal, that can host non-trivial topological properties, depending upon its magnetic state and excitations. Here, we report the synthesis…
Quasiparticle spectroscopy, transport, and magnetic properties of Nb films used in superconducting transmon qubits
Kamal R. Joshi, Sunil Ghimire, Makariy A. Tanatar +10
Niobium thin films on silicon substrate used in the fabrication of superconducting qubits have been characterized using scanning and transmission electron microscopy, electrical tr…
Anisotropic superconductivity of niobium based on its response to non-magnetic disorder
Makariy A. Tanatar, Daniele Torsello, Kamal R. Joshi +8
Niobium is one of the most studied superconductors, both theoretically and experimentally. It is tremendously important for applications, and it has the highest superconducting tra…
Possible unconventional order parameter in single crystals of SrPtP superconductor
Kyuil Cho, S. Teknowijoyo, S. Ghimire +4
Anisotropic properties of single crystals of SrPtP were studied using London penetration depth and electrical resistivity measurements. The upper critical field, ,…
Possible unconventional pairing in superconductors revealed by controlling disorder
E. H. Krenkel, M. A. Tanatar, M. Konczykowski +11
We study the evolution of temperature-dependent resistivity with controlled point-like disorder induced by 2.5 MeV electron irradiation in stoichiometric compositions of the "3-4-1…
Multi-band superconductivity in determined from the response to a controlled disorder
Kyuil Cho, M. Kończykowski, S. Ghimire +4
The London penetration depth, , was measured in a single crystal VSi. The superfluid density obtained from this measurement shows a distinct signature of two almost dec…
Intermediate scattering potential strength in electron-irradiated from London penetration depth measurements
Kyuil Cho, M. Konczykowski, S. Teknowijoyo +4
Temperature-dependent London penetration depth, , of a high quality optimally-doped single crystal was measured using tunnel-diode…
Effect of controlled artificial disorder on the magnetic properties of EuFe(AsP) ferromagnetic superconductor
Sunil Ghimire, Marcin Kończykowski, Kyuil Cho +6
Static (DC) and dynamic (AC, at 14 MHz and 8 GHz) magnetic susceptibilities of single crystals of a ferromagnetic superconductor, $\textrm{EuFe}_{2}(\textrm{As}_{1-x}\textrm{P}_{x}…
Electron irradiation effects on superconductivity in PdTe: an application of a generalized Anderson theorem
E. I. Timmons, S. Teknowijoyo, M. Kończykowski +12
Low temperature ( 20~K) electron irradiation with 2.5 MeV relativistic electrons was used to study the effect of controlled non-magnetic disorder on the normal and supercondu…
Analysis of the London penetration depth in Ni-doped CaKFe4As4
D. Torsello, K. Cho, K. R. Joshi +10
We report combined experimental and theoretical analysis of superconductivity in CaK(FeNi)As (CaK1144) for 0, 0.017 and 0.034. To obtain the superfluid dens…