Zeeman splitting of the coulomb anomaly: A tunneling study in two dimensions
We report measurements of the tunneling density of states (DOS) of ultrathin Al films in which superconductivity is quenched by a parallel magnetic field, [Formula presented]. The normal state DOS not only displays the usual logarithmic zero bias anomaly (ZBA) but also a new anomaly, superimposed on the ZBA, that appears at bias voltages [Formula presented], the electron Zeeman splitting. Measurements in tilted fields reveal that the Zeeman feature collapses with increasing perpendicular field component, suggesting that it is associated with the Cooper electron-electron interaction channel. © 1996 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Wu, W., Williams, J., & Adams, P. (1996). Zeeman splitting of the coulomb anomaly: A tunneling study in two dimensions. Physical Review Letters, 77 (6), 1139-1142. https://doi.org/10.1103/PhysRevLett.77.1139