Kinetic inductance in superconducting CoSi2 coplanar microwave transmission lines

Ekaterina Mukhanova, Weijun Zeng, Elica Anne Heredia, Chun Wei Wu, Ilari Lilja, Juhn Jong Lin, Sheng Shiuan Yeh*, Pertti Hakonen*

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

1 Sitaatiot (Scopus)
17 Lataukset (Pure)

Abstrakti

We have looked into cobalt disilicide (CoSi2) as a potential building block for superconducting quantum circuits. In order to achieve this, we annealed a thin layer of Co to create microwave cavities with thickness of d = 10-105 nm from CoSi2 embedded in the silicon substrate. The cavity properties were measured as a function of temperature and power. In the films measuring 10 and 25 nm, we find a significant kinetic inductance LK with a non-BCS power-law variation δLK ∝ T4.3±0.2 at low temperatures. The quality factor of the studied microwave resonances varied from 3 × 103 (d = 10 nm) to ∼5 × 104 (d = 105 nm) and increased as d(A − log d) with thickness, with two-level systems having very little effect. The power dependence of kinetic inductance was analyzed in terms of heat flow due to electron-phonon coupling, which was found to be stronger than estimated for heat relaxation by regular quasiparticles.

AlkuperäiskieliEnglanti
Artikkeli041115
Sivut1-7
Sivumäärä7
JulkaisuAPL Materials
Vuosikerta12
Numero4
DOI - pysyväislinkit
TilaJulkaistu - 1 huhtik. 2024
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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