Single Crystal Growth at Warwick

沃里克的单晶生长

• 批准号: EP/I007210/1
• 负责人: Geetha Balakrishnan
• 金额: $ 60.64万
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2011
• 资助国家: 英国
• 起止时间: 2011 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FI007210%2F1
• 关键词: Single; Crystal; Growth; Warwick

The work of the Superconductivity and Magnetism Group Warwick centres on the investigation of strongly correlated electron systems. The philosophy of the group has been to adopt a multi-pronged approach to the study of a range of superconductors and magnetic materials. High quality single crystals are essential for these investigations. In-house experimentation on single crystals is complemented by studies at central facilities using techniques such as neutron and x-ray scattering, muon spin resonance, and measurements in high magnetic fields. These studies are used to arrive at a unified picture of the physics of the materials of interest.We propose to continue to build on our successful crystal growth activities at Warwick. We will produce high quality single crystals of oxides, selenides, silicides and related materials. These include exotic superconductors, various low-dimensional and frustrated magnetic materials, and multiferroics. These crystals will be grown by the floating zone technique using the three optical mirror furnaces that we have at Warwick (two halogen lamp furnaces and one xenon arc lamp furnace). The optical mirror furnaces allow us to grow crystals under different growth conditions including various gas atmospheres, in pressures of up to 10 bars and at temperatures of up to 3000 C. Alternative techniques such as flux growth and chemical vapour transport will be used for the growth of single crystal materials when the floating zone technique is not suitable. A newly acquired tetra-arc furnace will be commissioned and the Czochralski technique will be used to produce single crystals of intermetallic materials.Some of the materials discussed in the proposal may never have been produced in the form of single crystal before. The preparation of crystals of these materials will necessarily require several growth attempts in order to optimise the growth conditions.The single crystals grown are to be used in all of our EPSRC funded work. The crystals will also be made available to other researchers within the UK and internationally. The crystal growth programme supports a wide collaborative network that we have built up over many years. The work will stimulate the formation of new collaborations.

超导和磁性小组沃里克的工作集中在强关联电子系统的研究上。该小组的理念是采用多管齐下的方法来研究一系列超导体和磁性材料。高质量的单晶体对于这些研究是必不可少的。单晶的内部实验由中心设施的研究补充，中心设施使用中子和x射线散射，μ子自旋共振和高磁场测量等技术。这些研究被用来达到一个统一的图片的物理感兴趣的材料。我们建议继续建立在我们成功的晶体生长活动在沃里克。我们将生产高质量的氧化物，硒化物，硅化物和相关材料的单晶。这些包括奇异超导体，各种低维和受抑磁性材料，以及多铁性。这些晶体将使用我们在沃里克拥有的三个光学镜炉（两个卤素灯炉和一个氙弧灯炉）通过浮区技术生长。光学镜炉使我们能够在不同的生长条件下生长晶体，包括各种气体气氛，压力高达10 bar，温度高达3000 C。当浮区技术不适合时，将使用诸如助熔剂生长和化学气相传输的替代技术来生长单晶材料。一个新购置的四弧炉将投入使用，直拉技术将用于生产金属间化合物材料的单晶。提案中讨论的一些材料可能以前从未以单晶形式生产过。这些材料的晶体制备需要多次生长尝试，以优化生长条件。生长的单晶将用于我们EPSRC资助的所有工作。这些晶体也将提供给英国和国际上的其他研究人员。晶体生长计划支持我们多年来建立的广泛合作网络。这项工作将促进形成新的合作。

项目成果

Suppression of magnetic excitations near the surface of the topological Kondo insulator SmB 6

拓扑近藤绝缘体 SmB 6 表面附近磁激励的抑制

• DOI: 10.1103/physrevb.95.020410
• 发表时间: 2017
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Biswas P

Probing the superconducting ground state of the rare-earth ternary boride superconductors R RuB 2 ( R = Lu,Y) using muon-spin rotation and relaxation

利用μ子自旋旋转和弛豫探测稀土三元硼化物超导体R RuB 2 (R = Lu,Y)的超导基态

• DOI: 10.1103/physrevb.97.094506
• 发表时间: 2018
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Barker J

Anomalies of a topologically ordered surface.

• DOI: 10.1038/srep10260
• 发表时间: 2015-06-04
• 期刊: Scientific reports
• 影响因子: 4.6
• 作者: Biswas D;Thakur S;Ali K;Balakrishnan G;Maiti K
• 通讯作者: Maiti K

Suppression of magnetic excitations near the surface of the topological Kondo insulator SmB6

拓扑近藤绝缘体 SmB6 表面附近磁激励的抑制

• DOI: 10.48550/arxiv.1701.00955
• 发表时间: 2017
• 作者: Biswas P

Coexistence of type-I and type-II superconductivity signatures in ZrB12 probed by muon spin rotation measurements

通过μ子自旋旋转测量探测 ZrB12 中 I 型和 II 型超导特征的共存

• DOI: 10.48550/arxiv.1910.09082
• 发表时间: 2019
• 作者: Biswas P