Gupta Ritu, Paramanik U B, Ramakrishnan S, Rajeev K P, Hossain Z
Department of Physics, Indian Institute of Technology, Kanpur 208016, India.
J Phys Condens Matter. 2016 May 18;28(19):195702. doi: 10.1088/0953-8984/28/19/195702. Epub 2016 Apr 20.
Interplay between a charge density wave (CDW) and superconductivity in LaPt2(Si1-x Ge x )2 has been studied by electrical transport and magnetic measurements. LaPt2Si2 crystallizes in CaBe2Ge2 type structure which shows a first order structural phase transition from tetragonal to orthorhombic accompanied by a CDW transition at 112 K and superconducting transition at around 1.22 K as confirmed by temperature dependence of resistivity and magnetic measurements. For 2[Formula: see text] doping of germanium, while the CDW temperature T CDW decreases, the superconducting transition temperature T C shows an increase. T CDW increases for 5[Formula: see text] doping of germanium and the superconducting transition decreases. These findings demonstrate the competing nature of a CDW and superconductivity.
通过电输运和磁性测量研究了LaPt2(Si1-x Ge x )2中电荷密度波（CDW）与超导性之间的相互作用。LaPt2Si2以CaBe2Ge2型结构结晶，该结构显示出从四方相到正交相的一级结构相变，伴随着在112 K时的CDW转变和在约1.22 K时的超导转变，这已通过电阻率的温度依赖性和磁性测量得到证实。对于锗的2[公式：见正文]掺杂，虽然CDW温度T CDW降低，但超导转变温度T C却升高。对于锗的5[公式：见正文]掺杂，T CDW升高而超导转变降低。这些发现证明了CDW与超导性的竞争性质。
