Study of 0-$\pi$ phase transition in hybrid superconductor-InSb nanowire quantum dot devices

Abstract

Hybrid superconductor-semiconducting nanowire devices provide an ideal platform to investigating novel intragap bound states, such as the Andreev bound states (ABSs), Yu-Shiba-Rusinov (YSR) states, and the Majorana bound states. The competition between Kondo correlations and superconductivity in Josephson quantum dot (QD) devices results in two different ground states and the occurrence of a 0-$\pi$ quantum phase transition. Here we report on transport measurements on hybrid superconductor-InSb nanowire QD devices with different device geometries. We demonstrate a realization of continuous gate-tunable ABSs with both 0-type levels and $\pi$-type levels. This allow us to manipulate the transition between 0 and $\pi$ junction and explore charge transport and spectrum in the vicinity of the quantum phase transition regime. Furthermore, we find a coexistence of 0-type ABS and $\pi$-type ABS in the same charge state. By measuring temperature and magnetic field evolution of the ABSs, the different natures of the two sets of ABSs are verified, being consistent with the scenario of phase transition between the singlet and doublet ground state. Our study provides insights into Andreev transport properties of hybrid superconductor-QD devices and sheds light on the crossover behavior of the subgap spectrum in the vicinity of 0-$\pi$ transition.

References in corpus (19)

• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• Observation of Majorana Fermions in a Nb-InSb Nanowire-Nb Hybrid Quantum Device
• Tunable Supercurrent Through Semiconductor Nanowires
• Supercurrent reversal in quantum dots
• Quantum supercurrent transistors in carbon nanotubes
• Zero-bias anomaly in a nanowire quantum dot coupled to superconductors
• Spectral properties of locally correlated electrons in a BCS superconductor
• Critical Current 0-$\pi$ Transition in Designed Josephson Quantum Dot Junctions
• Transport Through Andreev Bound States in a Graphene Quantum Dot
• Even-odd effect in Andreev Transport through a Carbon Nanotube Quantum Dot
• Kondo-Enhanced Andreev Tunneling in InAs Nanowire Quantum Dots
• Kondo Universal Scaling for a Quantum Dot Coupled to Superconducting Leads
• Supercurrent and multiple Andreev reflections in an InSb nanowire Josephson junction
• Parity independence of the zero-bias conductance peak in a nanowire based topological superconductor-quantum dot hybrid device
• Transport Measurement of Andreev Bound States in a Kondo-Correlated Quantum Dot
• Superconductivity-enhanced bias spectroscopy in carbon nanotube quantum dots
• Pb/InAs nanowire Josephson junction with high critical current and magnetic flux focusing
• Andreev Bound States in the Kondo Quantum Dots Coupled to Superconducting Leads

Cited by in corpus (13)

• Singlet-doublet transitions of a quantum dot Josephson junction detected in a transmon circuit
• Strong and tunable spin-orbit interaction in a single crystalline InSb nanosheet
• Half-Integer Shapiro Steps in a Short Ballistic InAs Nanowire Josephson Junction
• From Cooper pair splitting to the non-local spectroscopy of a Shiba state
• Measurements of strain and bandgap of coherently epitaxially grown wurtzite InAsP-InP core-shell nanowires
• Josephson junctions in double nanowires bridged by in-situ deposited superconductors
• Ground state phase diagram and "parity flipping'' microwave transitions in a gate-tunable Josephson Junction
• Footprints of impurity quantum phase transitions in quantum Monte Carlo statistics
• Gate-tunable negative differential conductance in hybrid semiconductor-superconductor devices
• Tunable Fano and Dicke effects in quantum transport of double quantum dots sandwiched between topological insulators
• Renormalized and iterative formalism of the Andreev levels within large multi-parametric space
• Spin splitting, Kondo correlation and singlet-doublet quantum phase transition in a superconductor-coupled InSb nanosheet quantum dot
• Microwave susceptibility observation of interacting many-body Andreev states