| Collective modes of type-ⅡWeyl fermions with repulsive S-wave interaction |
| |
| 引用本文： | 王勋高,孙远,刘亮,刘伍明.Collective modes of type-ⅡWeyl fermions with repulsive S-wave interaction[J].中国物理 B,2022,31(2):26701-026701. |
| |
| 作者姓名： | 王勋高 孙远 刘亮 刘伍明 |
| |
| 作者单位： | 1.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;2.School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;3.Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;4.Songshan Lake Materials Laboratory, Dongguan 523808, China |
| |
| 基金项目： | supported by the National Key R&D Program of China(Grant No.2016YFA0301500);the National Natural Science Foundation of China(Grants No.61835013);the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant Nos.XDB01020300 and XDB21030300)。 |
| |
| 摘 要： | Three-dimensional type-ⅡWeyl fermions possess overtilted cone-like low-energy band dispersion.Unlike the closed ellipsoidal Fermi surface for type-ⅠWeyl fermions,the Fermi surface is an open hyperboloid for type-ⅡWeyl fermions.We evaluate the spin and density susceptibility of type-ⅡWeyl fermions with repulsive S-wave interaction by means of Green’s functions.We obtain the particle–hole continuum along the tilted momentum direction and perpendicular to the tilted momentum direction respectively.We find the zero sound mode in some repulsive interaction strengths by numerically solving the pole equations of the susceptibility within the random-phase approximation.
|
| 关 键 词： | Weyl fermions zero sound mode random-phase approximation |
| 收稿时间： | 2021-11-08 |
Collective modes of type-II Weyl fermions with repulsive S-wave interaction |
| |
| Xun-Gao Wang,Yuan Sun,Liang Liu,Wu-Ming Liu.Collective modes of type-II Weyl fermions with repulsive S-wave interaction[J].Chinese Physics B,2022,31(2):26701-026701. |
| |
| Authors: | Xun-Gao Wang Yuan Sun Liang Liu Wu-Ming Liu |
| |
| Institution: | 1.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;2.School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;3.Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;4.Songshan Lake Materials Laboratory, Dongguan 523808, China |
| |
| Abstract: | Three-dimensional type-II Weyl fermions possess overtilted cone-like low-energy band dispersion. Unlike the closed ellipsoidal Fermi surface for type-I Weyl fermions, the Fermi surface is an open hyperboloid for type-II Weyl fermions. We evaluate the spin and density susceptibility of type-II Weyl fermions with repulsive S-wave interaction by means of Green's functions. We obtain the particle-hole continuum along the tilted momentum direction and perpendicular to the tilted momentum direction respectively. We find the zero sound mode in some repulsive interaction strengths by numerically solving the pole equations of the susceptibility within the random-phase approximation. |
| |
| Keywords: | Weyl fermions zero sound mode random-phase approximation |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |
|
