London Penetration Depth Measurements Using Tunnel Diode Resonators

  title={London Penetration Depth Measurements Using Tunnel Diode Resonators},
  author={Russell W. Giannetta and A Carrington and Ruslan Prozorov},
  journal={Journal of Low Temperature Physics},
The London penetration depth λ is the basic length scale for electromagnetic behavior in a superconductor. Precise measurements of λ as a function of temperature, field and impurity scattering have been instrumental in revealing the nature of the order parameter and pairing interactions in a variety of superconductors discovered over the past decades. Here we recount our development of the tunnel-diode resonator technique to measure λ as function of temperature and field in small single crystal… Expand


Penetration depth study of superconducting gap structure of 2H-NbSe2.
Measurements of the temperature dependence of both in-plane and out-of-plane penetration depths in 2H-NbSe2 suggest that the gap structure is not simply related to the weak electron-phonon coupling on the Se sheet and is therefore important for microscopic models of anisotropic superconductivity in this compound. Expand
Magnetic penetration depth in unconventional superconductors
This topical review summarizes various features of magnetic penetration depth in unconventional superconductors. Precise measurements of the penetration depth as a function of temperature, magneticExpand
The superconducting penetration depth from the semiclassical model
The semiclassical approach of Onsager and Pippard has been very successful in relating the electronic properties of a normal metal to its band structure and fermi surface. This paper extends theExpand
London penetration depth in iron-based superconductors
Measurements of London penetration depth, a sensitive tool to study multiband superconductivity, have provided several important insights into the behavior of Fe-based superconductors. We firstExpand
Meissner-London state in superconductors of rectangular cross section in a perpendicular magnetic field
The distribution of magnetic induction in Meissner state with finite London penetration depth is analyzed for platelet samples of rectangular cross-section in a perpendicular magnetic field. TheExpand
Tunnel diode resonator for precision magnetic susceptibility measurements in a mK temperature range and large DC magnetic fields.
The design of a setup for precision TDR measurements in a dilution refrigerator down to ∼40 mK with a 14 T superconducting magnet is described and the key features are the separated electronics components and the placement of the most field sensitive parts in the field-compensated zone far from the center of solenoid as well as the heat-sinking at a higher temperature stage. Expand
Temperature dependence of the penetration depth in Sr2RuO4: evidence for nodes in the gap function
It is argued that nonlocal effects, rather than impurity scattering, can explain the observed T2 dependence instead of the T-linear behavior expected for line nodes, and suggest that the gap function has nodes, inconsistent with candidate p-wave states. Expand
Evidence for surface Andreev bound states in cuprate superconductors from penetration depth measurements.
Strong evidence is found for the presence of Andreev bound states in clean single crystal YBCO and BSCCO through studies of the temperature and field dependence of the in-plane magnetic penetration depth lambda(ab) at low temperature. Expand
Low-temperature magnetic penetration depth in d -wave superconductors: Zero-energy bound state and impurity effects
We report a theoretical study on the deviations of the Meissner penetration depth $\lambda(T)$ from its London value in d-wave superconductors at low temperatures. The difference arises fromExpand
Effect of magnetic criticality and Fermi-surface topology on the magnetic penetration depth.
It is stressed that λ(T) is a good probe to detect the AF quantum critical point in the superconducting state, and the expected T-linear behavior at low temperatures approach T(1.5) asymptotically. Expand