对三联苯的新型固态真空石英封装生长：母体高温超导体（HTOS）
Novel solid state vacuum quartz encapsulated growth of p-Terphenyl: the parent High Tc Oraganic Superconductor (HTOS)
摘要：
本文报道了一种简便、通用的合成最新超导材料对三联苯母相的方法。掺杂对三联苯最近显示出超导电性，其转变温度高达120 K。对于晶体生长，将市售的对-三联苯粉末造粒，封装在抽空的（10-4托）石英管中，并经受高温（260 ℃）熔融，随后以5 ℃/小时缓慢冷却。工艺过程中采用简易控温加热炉。得到的晶体是一片，有光泽和板状。单晶表面XRD（X射线衍射）显示单向（00 l）线，表明晶体沿c方向生长。粉末XRD分析表明，对三联苯为单斜晶系，空间群为P21/a，晶格常数a = 8.08（2）A，b = 5.62（5）A，c= 13.58（3）A。晶体的扫描电子显微镜（SEM）照片显示出清晰的层状板状生长，没有任何可见的氧污染。对三联苯晶体的C-C-C弯曲振动、C-H弯曲振动、C-C伸缩振动和C-H伸缩振动的特征拉曼活性模式被清楚地观察到。晶体的物理性质还在研究中.这封简短的信报告了一种简单而通用的晶体生长方法，用于获得高质量的对三联苯。同样的生长方法可能适用于掺杂的对三联苯，并随后实现最新超导奇迹的高达120 K的超导性，即，高Tc有机超导体（HTOS）。
英文摘要：
We report an easy and versatile route for the synthesis of the parent phase of newest superconducting wonder material i.e. p-Terphenyl. Doped p-terphenyl has recently shown superconductivity with transition temperature as high as 120K. For crystal growth, the commercially available p-Terphenyl powder is pelletized, encapsulated in evacuated (10-4 Torr) quartz tube and subjected to high temperature (260C) melt followed by slow cooling at 5C/hour. Simple temperature controlled heating furnace is used during the process. The obtained crystal is one piece, shiny and plate like. Single crystal surface XRD (X-ray Diffraction) showed unidirectional (00l) lines, indicating that the crystal is grown along c-direction. Powder XRD of the specimen showed that as grown p-Terphenyl is crystallized in monoclinic structure with space group P21/a space group, having lattice parameters a = 8.08(2) A, b = 5.62(5) A and c= 13.58(3) A. Scanning electron microscopy (SEM) pictures of the crystal showed clear layered slab like growth without any visible contamination from oxygen. Characteristic reported Raman active modes related to C-C-C bending, C-H bending, C-C stretching and C-H stretching vibrations are seen clearly for the studied p-Terphenyl crystal. The physical properties of crystal are yet underway. The short letter reports an easy and versatile crystal growth method for obtaining quality p-terphenyl. The same growth method may probably be applied to doped p-terphenyl and to subsequently achieve superconductivity to the tune of as high 120K for the newest superconductivity wonder i.e., High Tc Oraganic Superconductor (HTOS).
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