论文标题
SN2PD:具有拓扑表面状态的可能的超导材料
Sn2Pd: a possible superconducting material with topological surface states
论文作者
论文摘要
在本文中,我们报告了拓扑半学(TSM)候选者SN2PD的详细磁铁传输测量。 SN2PD的单晶是通过自流量法合成的。相纯度和晶体形态通过粉末X射线衍射(PXRD)模式和场发射扫描电子显微镜(FESEM)图像确认。在运输和磁铁运输测量值中都可以看到超导转变的特征,这进一步由AC磁化研究支持。发现SN2PD在2.8K以下显示出超导性发作,但零电阻率降至2K下降。虽然,等于等温磁电阻率测量超导开始(2.8K)清楚地表现出类似超导体的行为,但在热容量测量中未观察到,这表明相同的性质是弱性质的。在SN2PD的正常状态下进行的磁转运测量表明存在弱抗钙化效应(WAL)效应,这是通过通过Hikami Larkin Nagaoka(HLN)形式上对低场磁电导率(MC)进行建模来确认的。在这里,值得一提的是,本文是SN2PD的磁铁传输测量值的第一篇报告,该报告显示为拓扑材料,其超导相位较弱,低于2.8k。
In this article, we report the detailed magneto transport measurements of the topological semimetal (TSM) candidate, Sn2Pd. Single crystal of Sn2Pd is synthesized through the self-flux method. Phase purity and crystalline morphology are confirmed through powder X ray diffraction (PXRD) pattern and field emission scanning electron microscopy (FESEM) image. Signatures of superconducting transition are seen in both transport and magneto transport measurements, which are further supported by the AC magnetization studies. Sn2Pd is found to show superconductivity onset at below 2.8K, but not the zero resistivity down to 2K. Although, isothermal magneto resistivity measurements below superconducting onset (2.8K) clearly exhibited superconductor-like behavior, but is not observed in heat capacity measurements, indicating the same to be of weak nature. Magnetotransport measurements performed in a normal state of Sn2Pd show the presence of a weak antilocalization (WAL) effect, which is confirmed by modeling of low field magneto-conductivity (MC) through Hikami Larkin Nagaoka (HLN) formalism. Here, it is worth mentioning that the present article is the first report on magneto transport measurements of Sn2Pd, which show the same to be a topological material with a weak superconducting phase below around 2.8K.