Non-local Tunneling Spectroscopy of Inelastic Quasiparticle Relaxation in Superconducting 1-D Wires
- URL: http://arxiv.org/abs/2604.26862v1
- Date: Wed, 29 Apr 2026 16:31:10 GMT
- Title: Non-local Tunneling Spectroscopy of Inelastic Quasiparticle Relaxation in Superconducting 1-D Wires
- Abstract summary: We employ mesoscopic three terminal Cu and Al NIS devices to study non-local quasiparticle transport over length-scales.<n>We observe non-local conductance features due to pair-breaking which are anti-symmetric with respect to the polarity of the voltage bias.<n>We compare these findings with quasiclassical simulations including inelastic effects to obtain estimates of the energy dependent inelastic scattering time.
- Score: 1.2480825148101342
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Non-local conductance experiments using tunnel junctions can provide valuable spectroscopic information on both the transport and relaxation of quasiparticles in superconductors, as these techniques directly probe the quasiparticle charge and energy imbalance even at mK temperatures. In this work, we employ mesoscopic three terminal Cu and Al NIS devices to study non-local quasiparticle transport over length-scales on the order of the superconducting coherence length in this regime. Via a dual-bias scheme, which utilizes detector biases both above and below the superconducting gap, we are able to extract the effect of quasiparticle energy imbalance via its impact on the self consistent pair potential by symmetry considerations. We observe non-local conductance features due to pair-breaking which are anti-symmetric with respect to the polarity of the voltage bias, with a sharp onset during single electron tunneling at energies around $3Δ$. We compare these findings with quasiclassical simulations including inelastic effects to obtain estimates of the energy dependent inelastic scattering time. In addition, we demonstrate kinetic effects due to a large applied supercurrent which can also be captured in this formalism and decomposed with respect to the particle-hole symmetry and supercurrent direction, and discuss further opportunities for the advancement of this method.
Related papers
- Floquet Control of Electron and Exciton Transport in Kekulé-Distorted Graphene [0.0]
This work investigates the Floquet dynamics of electrons and excitons (particle-hole pairs) in a Dirac material referred to as Kekulé-distorted graphene.
arXiv Detail & Related papers (2026-02-11T18:32:34Z) - Nonequilibrium nonlinear response theory of amplitude-dependent dissipative conductivity in disordered superconductors [0.0]
This work investigates amplitude-dependent nonlinear corrections to the dissipative conductivity in superconductors.<n>Our results provide microscopic insight into amplitude-dependent dissipation at frequencies well below ( Delta )
arXiv Detail & Related papers (2025-09-11T18:00:02Z) - Electron-Electron Interactions in Device Simulation via Non-equilibrium Green's Functions and the GW Approximation [71.63026504030766]
electron-electron (e-e) interactions must be explicitly incorporated in quantum transport simulation.<n>This study is the first one reporting large-scale atomistic quantum transport simulations of nano-devices under non-equilibrium conditions.
arXiv Detail & Related papers (2024-12-17T15:05:33Z) - Transport properties and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructures [44.99833362998488]
We propose a one-dimensional electronic nanodevice inspired in recently fabricated semiconductor-superconductor-ferromagnetic insulator hybrids.
We show that the device can be tuned across spin- and fermion parity-changing QPTs by adjusting the FMI layer length orange and/or by applying a global backgate voltage.
Our findings suggest that these effects are experimentally accessible and offer a robust platform for studying quantum phase transitions in hybrid nanowires.
arXiv Detail & Related papers (2024-10-18T22:25:50Z) - Dissipative stabilization of maximal entanglement between non-identical
emitters via two-photon excitation [49.1574468325115]
Two non-identical quantum emitters, when placed within a cavity and coherently excited at the two-photon resonance, can reach stationary states of nearly maximal entanglement.
We show that this mechanism is merely one among a complex family of phenomena that can generate both stationary and metastable entanglement when driving the emitters at the two-photon resonance.
arXiv Detail & Related papers (2023-06-09T16:49:55Z) - Crossover from exciton polarons to trions in doped two-dimensional
semiconductors at finite temperature [0.0]
We study systematically the role of temperature in the optical response of doped two-dimensional semiconductors.
By making use of a finite-temperature Fermi-polaron theory, we reveal a crossover from a quantum-degenerate regime with well-defined polaron quasiparticles to an incoherent regime at high temperature or low doping.
arXiv Detail & Related papers (2022-12-12T00:09:12Z) - On the Su-Schrieffer-Heeger model of electron transport: low-temperature
optical conductivity by the Mellin transform [62.997667081978825]
We describe the low-temperature optical conductivity as a function of frequency for a quantum-mechanical system of electrons that hop along a polymer chain.
Our goal is to show vias how the interband conductivity of this system behaves as the smallest energy bandgap tends to close.
arXiv Detail & Related papers (2022-09-26T23:17:39Z) - Driving Force and Nonequilibrium Vibronic Dynamics in Charge Separation
of Strongly Bound Electron-Hole Pairs [59.94347858883343]
We study the dynamics of charge separation in one, two and three-dimensional donor-acceptor networks.
This allows us to identify the precise conditions in which underdamped vibrational motion induces efficient long-range charge separation.
arXiv Detail & Related papers (2022-05-11T17:51:21Z) - Interplay between singlet and triplet pairings in multi-band
two-dimensional oxide superconductors [0.0]
We study the superconducting properties of multi-band two-dimensional transition metal oxide superconductors.
The interplay between the singlet and the triplet pairings affects the dispersion of quasi-particle excitations in the Brillouin zone.
Non-trivial topological superconducting states become stable as a function of the charge density.
arXiv Detail & Related papers (2021-07-02T14:27:55Z) - Quasiparticle tunneling as a probe of Josephson junction barrier and
capacitor material in superconducting qubits [2.6549320605996862]
Non-equilibrium quasiparticles are possible sources for decoherence in superconducting qubits because they can lead to energy decay or dephasing upon tunneling across Josephson junctions (JJs)
Here, we investigate the impact of the intrinsic properties of two-dimensional transmon qubits on quasiparticle tunneling (QPT)
We find the tunneling rate of the nonequilibrium quasiparticles to be sensitive to the choice of the shunting capacitor material and their geometry in qubits.
arXiv Detail & Related papers (2021-06-22T02:33:59Z) - Observation-dependent suppression and enhancement of two-photon
coincidences by tailored losses [68.8204255655161]
Hong-Ou-Mandel (HOM) effect can lead to a perfect suppression of two-particle coincidences between the output ports of a balanced beam splitter.
In this work, we demonstrate experimentally that the two-particle coincidence statistics of two bosons can instead be seamlessly tuned to substantial enhancement.
Our findings reveal a new approach to harnessing non-Hermitian settings for the manipulation of multi-particle quantum states.
arXiv Detail & Related papers (2021-05-12T06:47:35Z) - Chemical tuning of spin clock transitions in molecular monomers based on
nuclear spin-free Ni(II) [52.259804540075514]
We report the existence of a sizeable quantum tunnelling splitting between the two lowest electronic spin levels of mononuclear Ni complexes.
The level anti-crossing, or magnetic clock transition, associated with this gap has been directly monitored by heat capacity experiments.
The comparison of these results with those obtained for a Co derivative, for which tunnelling is forbidden by symmetry, shows that the clock transition leads to an effective suppression of intermolecular spin-spin interactions.
arXiv Detail & Related papers (2021-03-04T13:31:40Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.