Table 1 Comparison of physical parameters of LiTi2O4 to values from previous work.

From: Anomalous magnetoresistance in the spinel superconductor LiTi2O4

 

T c (K)

Δ(meV)

ξ BCS (nm)

ξ GL (nm)

n (cm−3)

m*/m0

l (nm)

νF(m s−1)

N(EF)

Present

11±0.25

1.93±0.01

14.9

4.47

3 × 1022

8.11

1.84

1.37 × 105

0.96

Previous

11.5±0.5

1.9

—

4.1–4.6

1.35 × 1022

9.4

3.2

—

0.97

  1. The quantities in the present work were obtained from transport and tunnelling results on Sample L1. Since most of the earlier studies were carried out on polycrystalline samples, the parameters such as carrier density (n), effective mass (m*) and density of states (N(EF): states per eV atom) are from previous magnetic susceptibility measurements using nearly free electron approximations7. The mean free path (l) was calculated from the specific heat data6. We compare the Ginzburg–Landau coherence length (ξGL) to the value reported by another thin film study16, and the superconducting energy gap (Δ) to the value obtained from an Andreev study on polycrystalline samples9.
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