Interfacial Superconductivity Achieved in Parent AEFe2As2 (AE = Ca, Sr, Ba) by a Simple and Realistic Annealing Route.

Materials with interfaces often exhibit extraordinary phenomena exemplified by rich physics, such as high-temperature superconductivity and enhanced electronic correlations. However, demonstrations of confined interfaces to date have involved intensive effort and fortuity, and no simple path is consistently available. Here, we report the achievement of interfacial superconductivity in the nonsuperconducting parent compounds AEFe2As2, where AE = Ca, Sr, or Ba, by simple subsequent annealing of the as-grown samples in an atmosphere of As, P, or Sb. Our results indicate that the superconductivity originates from electron transfer at the interface of the hybrid van der Waals heterostructures, consistent with the two-dimensional superconducting transition observed. The observations suggest a common origin of interfaces for the nonbulk superconductivity previously reported in the AEFe2As2 compound family and provide insight for the further exploration of interfacial superconductivity.

[Tamoxifen combined with coenzyme Q10 for idiopathic oligoasthenospermia].

OBJECTIVE: To investigate the effects of tamoxifen (TMX) combined with coenzyme Q10 (CoQ10) on idiopathic oligoasthenospermia. METHODS: A total of 183 patients with idiopathic oligoasthenospermia were randomly divided into a TMX + CoQ10 group (n = 63), a TMX group (n = 61) and a CoQ10 group (n = 59). At the end of 3 and 6 months of treatment, semen analyses and hormone tests were performed, and the results were compared with those obtained before the treatment. RESULTS: Compared with the pre-treatment results, the levels of follicle-stimulating hormone (FSH), luteinizing hormone (LH) and testosterone (T) and sperm concentration were significantly elevated in the TMX + CoQ10 and TMX groups (P < 0.05), but showed no significant difference in the CoQ10 group (P > 0.05); sperm motility and morphologically normal sperm were increased significantly in the TMX + CoQ10 and CoQ10 groups (P < 0.05), and slightly in the TMX group but with no statistically significant difference (P > 0.05). CONCLUSION: Tamoxifen combined with CoQ10 can significantly improve sperm concentration, motility and morphology in patients with idiopathic oligoasthenospermia.