Table 2 Specifications of 18O-exchanged and 18O-free single crystals

From: Enhanced superconductivity close to a non-magnetic quantum critical point in electron-doped strontium titanate

x

(nominal)

n

(per Ti)

n

(cm−3)

ρ (300 K)

(Ωcm)

ρ (5 K)

(Ωcm)

A

(μΩcmK−2)

z

T c

(K)

0.002

0.0016

2.70 × 1019

0.0495

3.08 × 10−4

0.249

0

0.38

0.0018

2.96 × 1019

0.0529

3.99 × 10−4

0.281

0.57

0.50

0.0035

0.0036

5.88 × 1019

0.0210

2.95 × 10−4

0.124

0

0.44

0.0036

6.04 × 1019

0.0224

3.19 × 10−4

0.132

0.57

0.55

0.01

0.011

1.88 × 1019

0.00599

1.75 × 10−4

0.041

0

0.16

0.011

1.88 × 1019

0.00693

2.34 × 10−4

0.044

0.60

0.22

  1. The nominal value of x, the carrier density n (per a Ti site and per cm3) determined from Hall effect measurements, the resistivity ρ at 300 K and 5 K, the coefficient A in ρ ~ AT2 below 40 K, the amount of 18O exchange z estimated from Raman scattering spectroscopy, and the superconducting critical temperatures Tc for our Sr1−xLaxTi(16O1−z18Oz)3 single crystals
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