Heat capacity of high-purity lanthanum

Abstract

A study of the specific heat of high-purity single-phase dhcp La shows that this material is an intrinsic type-II superconductor with a K of about 2.4. The temperature dependence of the free energy is characteristic of an intermediate coupling superconductor with 2b/k8 T, = 3.7.

Tunneling into thin superconducting films: Interface-induced quasiparticle lifetime reduction

“…As already suggested by the large mean free path l, which [18]. The required inelastic scattering rate of the interface as determined from the fit is 1/τ interface = 1.6×10 12 s −1 .…”

Structural, thermodynamic, and mechanical properties of bulk La and A-La2O3

“…It could be discerned that the calculated heat capacities of La and A-La 2 O 3 from the present study are in good agreement with experimental results in the literature, and the present C P of dhcp La seem a little bit closer to the experimental values than those from the phonon calculations [38]. For instance, the present C P of dhcp La and A-La 2 O 3 at 50 K are 15.5 and 17.5 J/mol/K, respectively, consistent with the corresponding values of 18.1 and 22.9 J/mol/K from experiments [43,63,20]. One can also see clearly from Fig.…”

“…For the sake of comparison, the experimental values of heat capacities available in the literature are also included in Fig. 5 and Table 2 [20,43,53,63]. It could be discerned that the calculated heat capacities of La and A-La 2 O 3 from the present study are in good agreement with experimental results in the literature, and the present C P of dhcp La seem a little bit closer to the experimental values than those from the phonon calculations [38].…”

“…Firstly, it can be seen from Fig. 1 that the differences between the lowest total energies of dhcp and fcc structures are very small, which agrees well with the experimental observation that these two phases can coexist and are difficult to be separated from each other below $609 K [41][42][43].…”

“…bcc from LDA. Such a dramatic comparison suggests that the groundstate structure of bulk La predicted from the present PAW-GGA method should be dhcp, which agrees well with the experimentally observation of the stable dhcp structure for bulk La [41][42][43]49,50]. In other words, the present PAW-LDA fails to predict the correct ground-state structure of bulk La.…”