Dimensional crossover in the electrical and magnetic properties of the layered LaSb2 superconductor under pressure: The role of phase fluctuations
We present electrical transport, magnetization, and ac as well as dc magnetic susceptibility measurements of the highly anisotropic compound LaSb2. Our data display a very broad anisotropic transition upon cooling below 2.5 K into a clean superconducting state with a field-dependent magnetization that is consistent with type I behavior. We identify distinct features of two-dimensionality in both the transport and magnetic properties. Application of hydrostatic pressure induces a two- to three-dimensional crossover evidenced by a reduced anisotropy and transition width. The superconducting transition appears phase-fluctuation-limited at ambient pressure, with fluctuations observed for temperatures greater than eight times the superconducting critical temperature. © 2011 American Physical Society.
Publication Source (Journal or Book title)
Physical Review B - Condensed Matter and Materials Physics
Guo, S., Young, D., Adams, P., Wu, X., Chan, J., McCandless, G., & Ditusa, J. (2011). Dimensional crossover in the electrical and magnetic properties of the layered LaSb2 superconductor under pressure: The role of phase fluctuations. Physical Review B - Condensed Matter and Materials Physics, 83 (17) https://doi.org/10.1103/PhysRevB.83.174520