paper

Synthesis, crystal structure and physical properties of quasi-one-dimensional ACr $_{3}$ As $_{3}$ (A = Rb, Cs)

arXiv:1508.01387 · doi:10.1007/s40843-015-0063-0

Abstract

Recently, new Cr-based superconductors, A $_{2}$ Cr $_{3}$ As $_{3}$ (A = K, Rb, Cs), have gained a strong interest because of their one-dimensional crystal structures and electron correlations. Here we report the crystal structure and physical properties of two related materials ACr $_{3}$ As $_{3}$ (A = Rb, Cs) which are synthesized via a soft-chemical A+ deintercalation in A $_{2}$ Cr $_{3}$ As $_{3}$ . The new compounds remain one-dimensional (Cr $_{3}$ As $_{3}$ ) $_{\infty}$ linear chains, and the interchain distance can be tuned by the incorporation of the alkali-metal cations with different sizes. The physical-property measurements indicate a local-moment behavior at high temperatures, and the moments freeze into a cluster spin-glass state below 5 $\sim$ 6 K. No superconductivity was observed in both materials. We also found that, with increasing the interchain distance, the Cr effective moments increase monotonically, accompanied with the enhancement of semi-conductivity. Our results shed light on the understanding of occurrence of superconductivity in A $_{2}$ Cr $_{3}$ As $_{3}$ .

9 pages, 7 figures

Synthesis, crystal structure and physical properties of quasi-one-dimensional ACr3​As3​ (A = Rb, Cs)

Abstract

Synthesis, crystal structure and physical properties of quasi-one-dimensional ACr $_{3}$ As $_{3}$ (A = Rb, Cs)