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首页> 外文期刊>Bulletin of the American Physical Society >APS -2017 Annual Meeting of the APS Mid-Atlantic Section- Event - Optimizing Sample Preparation for Soft Point Contact Spectroscopy of Iron Pnictude Crystals
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APS -2017 Annual Meeting of the APS Mid-Atlantic Section- Event - Optimizing Sample Preparation for Soft Point Contact Spectroscopy of Iron Pnictude Crystals

机译：APS -2017年APS大西洋中部分会年会-活动-优化铅锡晶体的软点接触光谱的样品制备

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摘要

Point contact spectroscopy is a widely-used technique for measuring the energy gap of superconductors. Working with iron-based pnictides, particularly K-doped iron pnictide Ba(1-x)KxFe2As2, we have made electrical contact to crystal samples obtained from collaborators by applying a small amount of silver paint using a sharp-tipped wire. We have been moderately successful using this technique and report some results of measurements here. We report progress on ongoing efforts to optimize delivery of silver paint using a more controlled way that employs micro-pipettes. We also present details of how our conductance measurements are influenced by ``fritting'' which is a technique of tuning the point contact region through current impulses. All measurements were performed by undergraduate students.
机译：点接触光谱法是一种用于测量超导体能隙的广泛使用的技术。通过使用铁基农药，特别是掺K的铁农药Ba（1-x）KxFe2As2，我们通过使用尖尖的导线涂少量银漆，使与合作者获得的晶体样品发生了电接触。我们已经成功地使用了这种技术，并在此处报告了一些测量结果。我们报告了使用微移液器以更受控的方式优化银漆交付的持续努力的进展。我们还介绍了电导率测量如何受到``摩擦''影响的详细信息，该技术是通过电流脉冲调整点接触区域的技术。所有测量均由本科生进行。

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