TY - JOUR
T1 - Superconductivity in the Layered Cage Compound Ba3Rh4Ge16
AU - Zhao, Yi
AU - Deng, Jun
AU - Bhattacharyya, A.
AU - Adroja, D. T.
AU - Biswas, P. K.
AU - Gao, Lingling
AU - Cao, Weizheng
AU - Li, Changhua
AU - Pei, Cuiying
AU - Ying, Tianping
AU - Hosono, Hideo
AU - Qi, Yanpeng
N1 - Publisher Copyright:
© 2021 Chinese Physical Society and IOP Publishing Ltd.
PY - 2021/12
Y1 - 2021/12
N2 - We report the synthesis and superconducting properties of a layered cage compound Ba3Rh4Ge16. Similar to Ba3Ir4Ge16, the compound is composed of 2D networks of cage units, formed by noncubic Rh-Ge building blocks, in marked contrast to the reported rattling compounds. The electrical resistivity, magnetization, specific heat capacity, and μSR measurements unveiled moderately coupled s-wave superconductivity with a critical temperature T c = 7.0 K, the upper critical field μ 0 H c2(0) ∼ 2.5 T, the electron-phonon coupling strength λ e-ph ∼ 0.80, and the Ginzburg-Landau parameter κ ∼ 7.89. The mass reduction with the substitution of Ir by Rh is believed to be responsible for the enhancement of T c and coupling between the cage and guest atoms. Our results highlight the importance of atomic weight of framework in cage compounds in controlling the λ e-ph strength and T c.
AB - We report the synthesis and superconducting properties of a layered cage compound Ba3Rh4Ge16. Similar to Ba3Ir4Ge16, the compound is composed of 2D networks of cage units, formed by noncubic Rh-Ge building blocks, in marked contrast to the reported rattling compounds. The electrical resistivity, magnetization, specific heat capacity, and μSR measurements unveiled moderately coupled s-wave superconductivity with a critical temperature T c = 7.0 K, the upper critical field μ 0 H c2(0) ∼ 2.5 T, the electron-phonon coupling strength λ e-ph ∼ 0.80, and the Ginzburg-Landau parameter κ ∼ 7.89. The mass reduction with the substitution of Ir by Rh is believed to be responsible for the enhancement of T c and coupling between the cage and guest atoms. Our results highlight the importance of atomic weight of framework in cage compounds in controlling the λ e-ph strength and T c.
UR - http://www.scopus.com/inward/record.url?scp=85123454029&partnerID=8YFLogxK
U2 - 10.1088/0256-307X/38/12/127402
DO - 10.1088/0256-307X/38/12/127402
M3 - Article
AN - SCOPUS:85123454029
SN - 0256-307X
VL - 38
JO - Chinese Physics Letters
JF - Chinese Physics Letters
IS - 12
M1 - 127402
ER -