| 查看: 2387 | 回复: 80 | |||||||||||||
| 【奖励】 本帖被评价75次，作者wenke1526增加金币 58.2 个 | |||||||||||||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||||||||||||
[资源]
Study of electronic and magnetic excitations in the 2D materials 石墨烯毕业论文
|
|||||||||||||
|
《Study of electronic and magnetic excitations in the 2D materials represented by graphene and magnetic nano-ribbons》The discovery of graphene - a 2D material with superior physical properties - in 2004 is an important part of the intensive global research to find alternatives to 3D semiconductor materials in the industry. At the same time there have been intensive advanced in the 2D magnetic materials. The superior properties of graphene are mainly attributed to both its crystal structure - 2D honeycomb lattice - and its short-range interactions. These properties show that the physics of natural and artificial 2D materials are promising candidates to start a new industrial paradigm. In this thesis we have investigated the eects of the 2D lattices structures, the range of the interaction as nearest neighbor (NN) and next nearest neighbor (NNN) interaction, and the forming of bilayer systems in the electronic and the magnetic excitations in several 2D materials represented by zigzag and armchair graphene nanoribbons as well as magnetic nanodots arrayed in stripes. The theoretical method employed throughout the thesis is based on the second quantization forms of both the tight-binding Hamiltonian for electronic excitations and the Heisenberg Hamiltonian for magnetic excitations. The results show that 2D lattices structures of these materials play a crucial rule in determining the shape of its dispersion relation. The case of the 2D square lattice shows an unexpected dispersion relation for the area and edge spin waves as they only have optic modes branches. In contrast, the case of the 2D honeycomb lattice shows very similar dispersion relation of magnetic nanodots stripes and their graphene counterpart. The study shows that introducing NNN with small strength interaction to the 2D materials removes the materials NN dispersion relations symmetry around the Fermi level and shifting the Fermi level, while increasing the NNN strength interaction compared to NN interaction change completely the 2D materials NN dispersion relations. The results also show that the 2D material sensitivity for NNN hopping eect is dependent on their lattice structure. The study also shows that forming the 2D materials as a bilayer system gives the possibility of tuning the system properties by changing many available parameters such that the interlayer hopping strength, introducing impurities, and changing the range of the interaction. Finally, the tridiagonal method has been used to distinguish between edges modes and area modes in order to study the edge sites properties eect on edge localized states of semiinfinite zigzag 2D honeycomb sheet. The results show a realistic behavior for the dependance of edge localized states of zigzag graphene on the edge sites properties which explains many experimental results. [ 来自科研家族 小木虫青春动力 ]    [ Last edited by lchpy on 2011-12-21 at 09:21 ] |
回复此楼» 本帖附件资源列表
-
欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com - 附件 1 : __Study_of_electronic_and_magnetic_excitations_in_the_2D_materials_represented_by_graphene_and_magnetic_nano_ribbons.rar
2011-12-20 14:53:27, 3.16 M
» 收录本帖的淘帖专辑推荐
 电化学-电池材料 | Nano&Micro | nano physics&chem | 先进碳材料 |
| 介孔+微纳米材料+DFT计算+热门资源 | 碳材料-wy | Graphene & MTMs & PCs & Plasmonics | 新技术 |
| 化学科研资源 | 科研啊 努力啊 希望有用啊 | 待下载 |
» 猜你喜欢
化工学院（学院正式调剂群+联系方式）
已经有0人回复
-
化工学院（学院官方群）-院士团队招生-学生自由度高-培养模式成熟高效
已经有0人回复
-
无机化学论文润色/翻译怎么收费?
已经有57人回复
-
黑龙江大学分析化学招调剂
已经有0人回复
-
武汉高校国家级人才团队招收材料，化学，纺织等专业硕士调剂生
已经有26人回复
-
纺大化工学院（官方群）-院士团队招生-学生自由度高发展好-培养模式成熟
已经有0人回复
-
温州大学化材学院王娟课题组招生
已经有5人回复
-
学院官方群-院士团队招生-学生自由度高-培养模式成熟已有10余名学生赴985海外深造
已经有0人回复
-
武汉纺织大学化工学院官方群-院士团队招生-学生自由度高-10余名学生赴985海外深造
已经有0人回复
-
南昌航空大学蒋华麟教授课题组招收化学、环境、碳达峰碳中和及相关专业硕士信息
已经有0人回复
-
湖北师范大学复试调剂
已经有0人回复
» 本主题相关商家推荐: (我也要在这里推广)
» 本主题相关价值贴推荐，对您同样有帮助:
- 2D高手，请指教啊！万分感谢！
已经有3人回复
- In situ prepared PBSu/SiO2 nanocomposites. Study of thermal degradation mechanis
已经有4人回复
- African Journal of Biotechnology还是sci 吗？
已经有14人回复
- 【分享】小说A Song of Ice and Fire 乔治·R·R·马丁中英文版【已搜索无重复】
已经有22人回复
- 【分享】Principles of Electronic Materials and Devices习题及解答【已搜索无重复】
已经有39人回复
- Journal of alloys and compounds 第一次投稿，上传资料求助，谢谢！
已经有7人回复
- 【其他】征集第一性原理计算方面牛人的主页【活动结束】
已经有80人回复
4楼2011-12-20 17:01:24
2楼2011-12-20 15:23:09
13楼2011-12-20 20:40:29
简单回复
aaq28003楼
2011-12-20 16:41
回复
五星好评 顶一下，感谢分享！
szh25355楼
2011-12-20 17:42
回复
三星好评 顶一下，感谢分享！
anionxt6楼
2011-12-20 18:05
回复
五星好评 顶一下，感谢分享！
rdcr7楼
2011-12-20 19:24
回复
五星好评 顶一下，感谢分享！
jorjor008楼
2011-12-20 19:49
回复
五星好评 顶一下，感谢分享！
2011-12-20 19:54
回复
五星好评 顶一下，感谢分享！
xldongcn10楼
2011-12-20 20:09
回复
五星好评 顶一下，感谢分享！
jflsd11楼
2011-12-20 20:20
回复
五星好评 顶一下，感谢分享！
沧海扶摇12楼
2011-12-20 20:32
回复
三星好评 顶一下，感谢分享！
plain36414楼
2011-12-20 21:04
回复
五星好评 顶一下，感谢分享！
