Brett Ellman

TRANSVERSE ULTRASOUND REVISITED : A DIRECTIONAL PROBE OF THE A PHASE OF UPT3

We have measured the transverse ultrasonic attenuation,

Piezoresistive torque magnetometry below 1 K

\alpha_{q\epsilon}

Theory of magnetic dissipation imaging

, in a well-characterized single crystal of

On the gap structure of UPt3: phases A and B

UPt_3

Structural modulations in UPt3 single crystal whiskers

for propagation direction,

Anisotropic thermal conductivity of YBa2Cu3O7−δ

{\bf q}

Heat conduction in the heavy fermion superconductor UPd2Al3

, in the basal plane and polarization,

Intrinsic pinning in the high-field C phase of UPt{sub 3}

\epsilon

Studies of the gap structure in the heavy fermion superconductor UPt3

, in and out of the plane. Unlike previous measurements, the sample was of sufficient purity to exhibit three well-defined phases as a function of temperature and magnetic field. We uncover a functional dependence for the attenuation in the (zero field) high temperature phase (A-phase) which is distinctly different than that in the low temperature (B) phase. Our data provide unique directional information on the quasiparticle momentum distribution in this largely unstudied phase of

Transport studies of La_(2-x)Sr_xCuO_4 near the insulator-metal-superconductor transition

UPt_3