Work

Unconventional s -Wave Superconductivity in Fe(Se,Te)

Year: 2010

Type: article

Abstract: The superconducting state is characterized by a pairing of electrons with a superconducting gap on the Fermi surface. In iron-based superconductors, an unconventional pairing state has been argued for theoretically. We used scanning tunneling microscopy on Fe(Se,Te) single crystals to image the quasi-particle scattering interference patterns in the superconducting state. By applying a magnetic field to break the time-reversal symmetry, the relative sign of the superconducting gap can be determined from the magnetic-field dependence of quasi-particle scattering amplitudes. Our results indicate that the sign is reversed between the hole and the electron Fermi-surface pockets (s(+/-)-wave), favoring the unconventional pairing mechanism associated with spin fluctuations.

Source: Science

DOI: 10.1126/science.1187399

Authors: T. Hanaguri, S. Niitaka, K. Kuroki, H. Takagi

Institutions: Japan Science and Technology Agency, RIKEN Advanced Science Institute, University of Electro-Communications, The University of Tokyo

Language: English

Topic: Iron-based superconductors research

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W1966479481

FWCI: 25.56

Cites: 30

Cited by: 511

Related to: 10