Electrically tunable macroscopic quantum tunneling in a graphene-based Josephson junction.

  title={Electrically tunable macroscopic quantum tunneling in a graphene-based Josephson junction.},
  author={Gil-Ho Lee and Dongchan Jeong and Jae-Hyun Choi and Yong-Joo Doh and Hu-Jong Lee},
  journal={Physical review letters},
  volume={107 14},
Stochastic switching-current distribution in a graphene-based Josephson junction exhibits a crossover from the classical to quantum regime, revealing the macroscopic quantum tunneling of a Josephson phase particle at low temperatures. Microwave spectroscopy measurements indicate a multiphoton absorption process occurring via discrete energy levels in washboard potential well. The crossover temperature for macroscopic quantum tunneling and the quantized level spacing are controlled with the gate… 
Macroscopic Quantum Tunneling in Superconducting Junctions of β-Ag2Se Topological Insulator Nanowire.
The observations indicate that the TI nanowire-based Josephson junctions can be a promising building block for the development of nanohybrid superconducting quantum bits.
Gate-tunable superconducting quantum interference devices of PbS nanowires
We report on the fabrication and electrical transport properties of gate-tunable superconducting quantum interference devices (SQUIDs), made of semiconducting PbS nanowire contacted with PbIn
Switching current distributions in InAs nanowire Josephson junctions
We report on the switching current distributions in nano-hybrid Josephson junctions made of InAs semiconductor nanowires. The temperature dependence of the switching current distribution can be
Complete gate control of supercurrent in graphene p-n junctions.
Bipolar Josephson junctions of graphene are fabricated, in which a p-n potential barrier is formed in graphene with two closely spaced superconducting contacts, and supercurrent ON/OFF states are realized using electrostatic gating only.
Strong Superconducting Proximity Effects in PbS Semiconductor Nanowires.
The observation of microwave-induced constant voltage steps confirms the existence of genuine Josephson coupling through the nanowire, and the temperature-dependent stochastic distribution of the switching current exhibits a crossover from phase diffusion to a thermal activation process as the temperature decreases.
Graphene-based Josephson junction single photon detector
We propose to use graphene-based Josephson junctions (gJjs) to detect single photons in a wide electromagnetic spectrum from visible to radio frequencies. Our approach takes advantage of the
Suspended graphene devices with local gate control on an insulating substrate.
This fabrication approach enables new experiments involving graphene-based superconducting qubits and nano-electromechanical resonators and is applicable to other two-dimensional materials.
Strain-tunable Josephson current in graphene-superconductor junction
Strain effects on Josephson current in a graphene-superconductor junction are explored theoretically. It is demonstrated that the supercurrent is an oscillatory function of zigzag direction strain
Escape dynamics in moderately damped Josephson junctions (Review Article)
The Josephson effect is a privileged access to the macroscopic quantum nature of superconductors. We review some ideas and experimental techniques on macroscopic quantum decay phenomena occurring in
Tuning Locality of Pair Coherence in Graphene-based Andreev Interferometers
A transitional change in the character of the pair coherence, between local and nonlocal, in the same device is confirmed as the effective length-to-width ratio of the device was modulated by tuning the pair-coherence length ξT in the graphene layer.


however (for it was the literal soul of the life of the Redeemer, John xv. io), is the peculiar token of fellowship with the Redeemer. That love to God (what is meant here is not God’s love to men)
Nature (London) 453
  • 1031
  • 2008
  • Rev. Lett. 101, 067002
  • 2008
PðIcÞ under microwave irradiation of varying power. The microwave frequency was fmw
  • Phys. Rev. Lett. 96,
  • 2006
Introduction to Superconductivity (Dover
  • New York,
  • 2004
  • Rev. Lett. 90, 037003
  • 2003
Nature (London) 404
  • 247
  • 2000
  • Rev. B 36, 1931
  • 1987
  • Rev. Lett. 46, 211
  • 1981
  • Mod. Phys. 51, 101
  • 1979