A measurement of the surface Andreev bound states of the superfluid 3He-B phase under different boundary conditions is presented. Transverse-acoustic impedance spectroscopy was used to determine the bandwidth of the bound states on a wall with various specularities. It was found that the band was broader for larger specularity and filled up the superfluid gap above a critical specularity. Specularity was controlled by coating the wall with thin layers of 4H e and was evaluated separately using acoustic impedance measurement in the normal-fluid phase.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2008 Dec 1|
ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials