Josephson Scanning Tunneling Spectroscopy in d_{x^{2}-y^{2}}-Wave Superconductors: A Probe for the Nature of the Pseudogap in the Cuprate Superconductors.

  title={Josephson Scanning Tunneling Spectroscopy in d\_\{x^\{2\}-y^\{2\}\}-Wave Superconductors: A Probe for the Nature of the Pseudogap in the Cuprate Superconductors.},
  author={Martin Graham and Dirk K. Morr},
  journal={Physical review letters},
  volume={123 1},
  • M. Graham, D. Morr
  • Published 30 November 2018
  • Physics, Medicine
  • Physical review letters
Recent advances in the development of Josephson scanning tunneling spectroscopy (JSTS) have opened a new path for the exploration of unconventional superconductors. We demonstrate that the critical current I_{c}, measured via JSTS, images the spatial form of the superconducting order parameter in d_{x^{2}-y^{2}}-wave superconductors around defects and in the Fulde-Ferrell-Larkin-Ovchinnikov state. Moreover, we show that I_{c} probes the existence of phase-incoherent superconducting correlations… 
3 Citations

Figures and Topics from this paper

Quasiclassical circuit theory of contiguous disordered multiband superconductors
We consider a general problem of a Josephson contact between two multiband superconductors with coexisting superconducting and magnetic phases. As a particular example, we use the quasiclassical
Quantum engineered Kondo lattices
The quantum engineering of nanoscale Kondo lattices – Kondo droplets – exemplifying nanoscopic replicas of heavy-fermion materials is investigated and a new quantum phenomenon – the Kondo echo – a signature of droplets containing Kondo holes functioning as direct probes of spatially extended, quantum-coherent Kondo cloud correlations is reported.
Discovery of a Cooper-pair density wave state in a transition-metal dichalcogenide
Imaging an exotic state Among the most intriguing of the many phases of cuprate superconductors is the so-called pair density wave (PDW) state. PDW is characterized by a spatially modulated density


Theory of Scanning Tunneling Microscopy Probe of Impurity States in a D-Wave Superconductor.
The local density of states is found to be sensitive to impurity-induced resonances and to the symmetry of the order parameter.
Electronic Structure of the Cuprate Superconducting and Pseudogap Phases from Spectroscopic Imaging STM
We survey the use of spectroscopic imaging scanning tunneling microscopy (SI-STM) to probe the electronic structure of underdoped cuprates. Two distinct classes of electronic states are observed in
Josephson scanning tunneling microscopy -- a local and direct probe of the superconducting order parameter
Direct measurements of the superconducting superfluid on the surface of vacuum-cleaved Bi2Sr2CaCu2O8+delta (BSCCO) samples are reported. These measurements are accomplished via Josephson tunneling
Imaging the spatial form of a superconducting order parameter via Josephson scanning tunneling spectroscopy
Motivated by recent experiments, we investigate Josephson scanning tunneling spectroscopy in an s-wave superconductor. We demonstrate that the spatial oscillations in the superconducting order
Magnetic enhancement of superconductivity from electron spin domains
Measurements of the heat capacity and magnetization show that, for particular orientations of an external magnetic field, superconductivity in the heavy-fermion material CeCoIn5 is enhanced through the magnetic moments (spins) of individual electrons.
Charge-4e superconductivity from pair-density-wave order in certain high-temperature superconductors
A number of spectacular experimental anomalies have been discovered recently in certain cuprates, notably La2−xBaxCuO4 and La1.6−xNd0.4SrxCuO4, which show unidirectional spin and charge order (known
Impurity-induced states in conventional and unconventional superconductors
We review recent developments in our understanding of how impurities influence the electronic states in the bulk of superconductors. Our focus is on the quasi-localized states in the vicinity of
Imaging superconducting vortex cores and lattices with a scanning tunneling microscope
The observation of vortices in superconductors was a major breakthrough in developing the conceptual background for superconducting applications. Each vortex carries a flux quantum, and the magnetic
Impurity-induced virtual bound states in d-wave superconductors.
For finite density of impurities in a {ital d}-wave superconductor, the Mott criterion for the metal-insulator transition in this band is discussed, and the explicit form of the bound-state wave function is found to decay exponentially with angle-dependent range.
Model for the temperature dependence of the quasiparticle interference pattern in the measured scanning tunneling spectra of underdoped cuprate superconductors
In this paper we explore the behavior of the quasi-particle interference pattern (QPI) of scanning tunneling microscopy as a function of temperature, $T$. After insuring a minimal consistency with