Plasmon mass and Drude weight in strongly spin-orbit-coupled two-dimensional electron gases
文献类型：期刊论文
| 作者 | Agarwal, A ; Chesi, S ; Jungwirth, T ; Sinova, J ; Vignale, G ; Polini, M |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2011 |
| 卷号 | 83期号:11页码:115135 |
| 关键词 | HGTE QUANTUM-WELLS SINGLE DIRAC CONE TOPOLOGICAL INSULATORS SPINTRONICS EXCITATIONS SCATTERING SYSTEMS SURFACE |
| ISSN号 | 1098-0121 |
| 通讯作者 | Agarwal, A (reprint author), CNR, Ist Nanosci, NEST, I-56126 Pisa, Italy. |
| 英文摘要 | Spin-orbit-coupled two-dimensional electron gases (2DEGs) are a textbook example of helical Fermi liquids, i.e., quantum liquids in which spin (or pseudospin) and momentum degrees of freedom at the Fermi surface have a well-defined correlation. Here we study the long-wavelength plasmon dispersion and the Drude weight of archetypical spin-orbit-coupled 2DEGs. We first show that these measurable quantities are sensitive to electron-electron interactions due to broken Galilean invariance and then discuss in detail why the popular random phase approximation is not capable of describing the collective dynamics of these systems even at very long wavelengths. This work is focused on presenting approximate microscopic calculations of these quantities based on the minimal theoretical scheme that captures the basic physics correctly, i.e., the time-dependent Hartree-Fock approximation. We find that interactions enhance the "plasmon mass" and suppress the Drude weight. Our findings can be tested by inelastic light scattering, electron energy loss, and far-infrared optical-absorption measurements. |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | European Community [215368]; Czech Republic [AV0Z10100521, KAN400100652, LC510]; NSF [DMR-0547875, DMR-0705460]; Preamium Academiae |
| 原文出处 | http://dx.doi.org/10.1103/PhysRevB.83.115135 |
| 语种 | 英语 |
| WOS记录号 | WOS:000288896400005 |
| 公开日期 | 2013-05-17 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/14389]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | Agarwal, A,Chesi, S,Jungwirth, T,et al. Plasmon mass and Drude weight in strongly spin-orbit-coupled two-dimensional electron gases[J]. PHYSICAL REVIEW B,2011,83(11):115135. |
| APA | Agarwal, A,Chesi, S,Jungwirth, T,Sinova, J,Vignale, G,&Polini, M.(2011).Plasmon mass and Drude weight in strongly spin-orbit-coupled two-dimensional electron gases.PHYSICAL REVIEW B,83(11),115135. |
| MLA | Agarwal, A,et al."Plasmon mass and Drude weight in strongly spin-orbit-coupled two-dimensional electron gases".PHYSICAL REVIEW B 83.11(2011):115135. |
入库方式： OAI收割
来源：理论物理研究所
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