کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11019910 1717616 2019 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pressure effects on the structural and superconducting transitions in La3Co4Sn13
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Pressure effects on the structural and superconducting transitions in La3Co4Sn13
چکیده انگلیسی
La3Co4Sn13 is a superconducting material with transition temperature at Tc=2.70 K, which presents a superlattice structural transition at T*≃150 K, a common feature for this class of compounds. However, for this material, it is not clear that at T* the lattice distortions arise from a charge density wave (CDW) or from a distinct microscopic origin. Interestingly, it has been suggested in isostructural non-magnetic intermetallic compounds that T* can be suppressed to zero temperature, by combining chemical and external pressure, and a quantum critical point is argued to be observed near these critical doping/pressure. Our study shows that application of pressure on single-crystalline La3Co4Sn13 enhances Tc and decreases T*. We observe thermal hysteresis loops for cooling/heating cycles around T* for P≳0.6 GPa, in electrical resistivity measurements, which are not seen in x-ray diffraction data. The hysteresis in electrical measurements may be due to the pinning of the CDW phase to impurities/defects, while the superlattice structural transition maintains its ambient pressure second-order transition nature under pressure. From our experiments we estimate that T* vanishes at around 5.5 GPa, though no quantum critical behavior is observed up to 2.53 GPa.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 773, 30 January 2019, Pages 34-39
نویسندگان
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