All raw data corresponding to manuscript "Dynamical superconducting parity effect in a Coulomb Pb island"

Small superconducting islands can exhibit charge quantization, where Coulomb interactions compete with Cooper pairing. Using scanning tunneling spectroscopy, we probe this interplay by measuring the charging energy (E_{C}) and the pairing energy (Δ) of individual Pb nanoislands. Below a critical island size, where E_{C}>Δ, we observe a crossover between even and odd parity ground states. By applying controlled voltage pulses, we continuously tune the island's electrostatic potential and map the full charge-parity landscape. These results demonstrate tunable superconducting ground states, offering a potential platform for qubit design and control.Small superconducting islands can exhibit charge quantization, where Coulomb interactions compete with Cooper pairing. Using scanning tunneling spectroscopy, we probe this interplay by measuring the charging energy (E_{C}) and the pairing energy (Δ) of individual Pb nanoislands. Below a critical island size, where E_{C}>Δ, we observe a crossover between even and odd parity ground states. By applying controlled voltage pulses, we continuously tune the island's electrostatic potential and map the full charge-parity landscape. These results demonstrate tunable superconducting ground states, offering a potential platform for qubit design and control.

arXiv:2507.12150Physical Review LettersNov 24, 20251 citation

Superconductivity due to coulomb interactions

S. Küchenhoff, Stephan Schiller

Physica B Condensed MatterAug 1, 19903 citations

Strongly correlated models of high-temperature superconductivity

Hüseyin Boyacı

Cataloged from PDF version of article.

Jan 1, 19990 citations

Parity effect in a superconducting island in a tunable dissipative environment

Watson Kuo, Cen-Shawn Wu, Jia-Hong Shyu +1 more

We have experimentally studied Coulomb oscillation in a superconducting single-electron transistor, where electromagnetic-environment impedance was controlled using a one-dimensional array of superconducting quantum interference devices. By decreasing environment impedance, the Coulomb oscillation exhibited a crossover from $2e$ to $1e$ periodicity. In addition, the $1e$ component was enhanced when additional noise was introduced by connecting a potential meter to the central island of the transistor. We propose a theoretical analysis for this parity effect that includes the effect of fluctuations arising from the finite noise temperature of the electromagnetic environment.We have experimentally studied Coulomb oscillation in a superconducting single-electron transistor, where electromagnetic-environment impedance was controlled using a one-dimensional array of superconducting quantum interference devices. By decreasing environment impedance, the Coulomb oscillation exhibited a crossover from $2e$ to $1e$ periodicity. In addition, the $1e$ component was enhanced when additional noise was introduced by connecting a potential meter to the central island of the transistor. We propose a theoretical analysis for this parity effect that includes the effect of fluctuations arising from the finite noise temperature of the electromagnetic environment.

Physical Review BNov 16, 20069 citations

Topics in superfluidity and superconductivity

Anthony J. Leggett

Springer eBooksApr 7, 200810 citations

Charge-vortex interplay in a superconducting Coulomb-blockaded island

Ivan M. Khaymovich, V. F. Maisi, Jukka P Pekola +1 more

We show that charge transfer through a small superconducting (S) island of a single-electron transistor is strongly affected by vorticity. This interplay of charge and rotational degrees of freedom in a mesoscopic superconductor occurs through the effect of vorticity on the quantum mechanical spectrum of electron-hole excitations. The subgap quasiparticle levels in vortices can host an extra electron, thus suppressing the so-called parity effect in the S island. We propose to measure the collective dynamics of vorticity and electric charge via the charge pumping effect caused by alternating vortex entry and exit controlled by a periodic magnetic field.We show that charge transfer through a small superconducting (S) island of a single-electron transistor is strongly affected by vorticity. This interplay of charge and rotational degrees of freedom in a mesoscopic superconductor occurs through the effect of vorticity on the quantum mechanical spectrum of electron-hole excitations. The subgap quasiparticle levels in vortices can host an extra electron, thus suppressing the so-called parity effect in the S island. We propose to measure the collective dynamics of vorticity and electric charge via the charge pumping effect caused by alternating vortex entry and exit controlled by a periodic magnetic field.

arXiv:1502.00272Physical Review BJul 6, 20152 citations

2e

1e

periodicity. In addition, the

1e

component was enhanced when additional noise was introduced by connecting a potential meter to the central island of the transistor. We propose a theoretical analysis for this parity effect that includes the effect of fluctuations arising from the finite noise temperature of the electromagnetic environment.