6 papers
Evidence for the FFLO state in CeCoIn_5 from penetration depth measurements
C. Martin, C. C. Agosta, S. W. Tozer +4
We report penetration depth and resistivity measurements on the heavy fermion superconductor CeCoIn_5 using a self resonant tank circuit based on a tunnel diode oscillator. For mag…
Implications of Tc variation in UBe13 for a possible Fulde-Ferrell-Larkin-Ovchinnikov phase
H. A. Radovan, R. J. Zieve, J. S. Kim +1
We measure the heat capacity of UBe13 with an unusually low Tc for a polycrystal. We find an upturn in the upper critical field Hc2(T) below about Tc/2, much as for higher-Tc sampl…
Comment on "First-Order Superconducting Phase Transition in CeCoIn5"
N. A. Fortune, H. A. Radovan, S. T. Hannahs +1
The Clogston estimate for the Pauli limit used in the original comment (and the paper to which it referred) neglects important effects that lead to a significant enhancement of the…
Unconventional superconductivity in CeCoIn5 with magnetic texture and orbital quantization
H. A. Radovan, N. A. Fortune, T. P. Murphy +4
A sufficiently high magnetic field applied to a superconductor will act on both the charge and the spin of the individual electrons breaking up the Cooper pairs. If the spin effect…
Critical field and Shubnikov-de Haas oscillations of k-(ET)2Cu(NCS)2 under pressure
C. Martin, C. C. Agosta, S. W. Tozer +3
A tuned tank circuit in combination with a nonmetallic diamond anvil cell has been successfully used to measure the change in critical field with angle in k-(ET)2Cu(NCS)2 at pressu…
Heavy-ion irradiation of UBe13 superconductors
H. A. Radovan, E. Behne, R. J. Zieve +4
We irradiate the heavy fermion superconductors (U,Th)Be_13 with high-energy heavy ions. Damage from the ions affects both heat capacity and magnetization measurements, although muc…