Specific heat of the non-centrosymmetric superconductor Re_3 W  

作　　者：闫静 单磊 罗强 汪卫华 闻海虎 

机构地区：[1]National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences

出　　处：《Chinese Physics B》2009年第2期704-708,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China;the National Basic Research Program of China (Grant Nos 2006CB601000, 2006CB921802 and 2006CB921300);the Knowledge Innovation Program of the Chinese Academy of Sciences (ITSNEM)

摘　　要：The alloys of non-centrosymmetric superconductor, Re3W, which were reported to have an ^-Mn structure [P. Greenfield and P. A. Beck, J. Metals, N. Y. 8, 265 （1959）] with Tc = 9K, are prepared by arc melting. The values of ac susceptibility and the low-temperature specific heat of these alloys are measured. It is found that there are two superconducting phases coexisting in the samples with Tc1 ≈ 9 K and Tc2 ≈ 7K, which are both non-centrosymmetric in structure as reported previously. By analysing the specific heat data measured in various magnetic fields down to a temperature of 1.8 K, we find that the absence of the inversion symmetry does not lead to an obvious deviation from an s-wave pairing symmetry in Re3W.The alloys of non-centrosymmetric superconductor, Re3W, which were reported to have an ^-Mn structure [P. Greenfield and P. A. Beck, J. Metals, N. Y. 8, 265 （1959）] with Tc = 9K, are prepared by arc melting. The values of ac susceptibility and the low-temperature specific heat of these alloys are measured. It is found that there are two superconducting phases coexisting in the samples with Tc1 ≈ 9 K and Tc2 ≈ 7K, which are both non-centrosymmetric in structure as reported previously. By analysing the specific heat data measured in various magnetic fields down to a temperature of 1.8 K, we find that the absence of the inversion symmetry does not lead to an obvious deviation from an s-wave pairing symmetry in Re3W.

关 键 词：ReaW NON-CENTROSYMMETRIC SUPERCONDUCTIVITY specific heat 

分 类 号：TM26[一般工业技术—材料科学与工程]