The Surface Density of States of Superfluid 3He for Different Surface Boundary Conditions

• Published in: Journal of Low Temperature Physics Vol. 150; no. 3-4; pp. 154 - 159
• Main Authors: Murakawa, Satoshi, Wada, Yuichiro, Tamura, Yuta, Saitoh, Masamichi, Aoki, Yuki, Nomura, Ryuji, Okuda, Yuichi
• Format: Journal Article
• Language: English; Japanese
• Published: Boston Springer Science and Business Media LLC 01.02.2008; Springer US
• Subjects: Characterization and Evaluation of Materials; Condensed Matter Physics; Magnetic Materials; Magnetism; Physics; Physics and Astronomy; 67.57.Np; Helium-3; Andreev bound states; 43.58.+z; 74.45.+c; Superfluid
• ISSN: 0022-2291; 1573-7357
• DOI: 10.1007/s10909-007-9527-2

We measured the complex transverse acoustic impedance of superfluid 3 He in the B phase by coating a surface with 4 He to study the boundary condition dependence of the surface bound states. Observed features in the temperature dependence were similar to those without 4 He coating. However, temperatures showing singularities became higher and variations in the dependence became smaller. The small variations indicated that a specular surface was realized by the 4 He coating. Increase in the singularity temperature indicated that the bandwidth of the surface Andreev bound states became broader by the coating.