Resonant and Inelastic Andreev Tunneling Observed on a Carbon Nanotube Quantum Dot.

  title={Resonant and Inelastic Andreev Tunneling Observed on a Carbon Nanotube Quantum Dot.},
  author={Jorg Gramich and Andreas Baumgartner and Christian Sch{\"o}nenberger},
  journal={Physical review letters},
  volume={115 21},
We report the observation of two fundamental subgap transport processes through a quantum dot (QD) with a superconducting contact. The device consists of a carbon nanotube contacted by a Nb superconducting and a normal metal contact. First, we find a single resonance with position, shape, and amplitude consistent with the theoretically predicted resonant Andreev tunneling (AT) through a single QD level. Second, we observe a series of discrete replicas of resonant AT at a separation of ~145 μeV… 

Figures from this paper

Subgap resonant quasiparticle transport in normal-superconductor quantum dot devices
We report thermally activated transport resonances for biases below the superconducting energy gap in a carbon nanotube (CNT) quantum dot (QD) device with a superconducting Pb and a normal metal
Cavity Photons as a Probe for Charge Relaxation Resistance and Photon Emission in a Quantum Dot Coupled to Normal and Superconducting Continua
Microwave cavities have been widely used to investigate the behavior of closed few-level systems. Here, we show that they also represent a powerful probe for the dynamics of charge transfer between a
Nanomechanics driven by Andreev tunneling
We predict and analyze mechanical instability and corresponding self-sustained mechanical oscillations occurring in a nanoelectromechanical system composed of a metallic carbon nanotube (CNT)
Intermediate states in Andreev bound state fusion
Hybridization is a very fundamental quantum mechanical phenomenon, with the text book example of binding two hydrogen atoms in a hydrogen molecule. In semiconductor physics, a quantum dot (QD) can be
Ground state cooling of nanomechanical resonators by electron transport
We discuss two theoretical proposals for controlling the nonequilibrium steady state of nanomechanical resonators using quantum electronic transport. Specifically, we analyse two approaches to
Full characterization of a carbon nanotube parallel double quantum dot
We have measured the differential conductance of a parallel carbon nanotube (CNT) double quantum dot (DQD) with strong inter‐dot capacitance and inter‐dot tunnel coupling. Nominally, the device
Andreev bound states probed in three-terminal quantum dots
Andreev bound states (ABSs) are well-defined many-body quantum states that emerge from the hybridization of individual quantum dot (QD) states with a superconductor and exhibit very rich and
Superconducting Contacts to a Monolayer Semiconductor
Superconducting vertical interconnect access (VIA) contacts to a monolayer of molybdenum disulfide (MoS2), a layered semiconductor with highly relevant electronic and optical properties, are demonstrated, suggesting a superconducting proximity effect.
Single atom laser in normal-superconductor quantum dots
We study a single-level quantum dot strongly coupled to a superconducting lead and tunnel-coupled to a normal electrode which can exchange energy with a single-mode resonator. We show that a such


Semiconductor Nanostructures: Quantum states and electronic transport
1. Introduction 2. Semiconductor Crystals 3. Band Structure 4. Envelope function and effective mass approximation 5. Material aspects of heterostructures, doping, surfaces, and gating 6. Fabrication
Electronic Transport In Mesoscopic Systems
The electronic transport in mesoscopic systems is universally compatible with any devices to read, and is available in the book collection an online access to it is set as public so you can get it instantly.
OF THE DISCLOSURE A gas Spring for a drawing table which has a cylinder, a piston in the cylinder, and a piston rod projecting from the piston through one end wall of the cylinder, the other end wall
  • Rev. B 86, 104513
  • 2012
Nanotechnology 21
  • 274018
  • 2010
  • O’Malley, M. Mariantoni, D. Sank, H. Wang, T.C. White, Y. Yin, J. Zhao, A.N. Cleland, J.M. Martinis, and J.J.A. Baselmans, Appl. Phys. Lett. 99, 113507
  • 2011
Science 301
  • 203
  • 2003
Landolt-Börnstein - Group III Condensed Matter (Springer Materials)
  • 1993