Texture of Superfluid He3 Probed by a Wigner Solid

The resistivity of the Wigner solid floating on the free surface of superfluid He3 has been measured in both the A and B phases down to 200μK in the magnetic field. The resistivity in the A phase shows the asymptotic behavior to the temperature-square dependence at low temperatures. The temperature dependence is successfully explained by the uniform l^ texture oriented normal to the surface and by the specular scattering of quasiparticles excited along l^ vector. In the B phase, the resistivity exhibits the exponential decrease at low temperatures. The steep increase of the resistivity observed at high magnetic field is attributable to the nonuniform texture of the field-distorted order parameter induced near the surface.