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题名: Plasmon mass and Drude weight in strongly spin-orbit-coupled two-dimensional electron gases
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
学科分类: Physics
通讯作者: Agarwal, A (reprint author), CNR, Ist Nanosci, NEST, I-56126 Pisa, Italy.
部门归属: [Agarwal, Amit; Polini, Marco] CNR, Ist Nanosci, NEST, I-56126 Pisa, Italy; [Agarwal, Amit; Polini, Marco] Scuola Normale Super Pisa, I-56126 Pisa, Italy; [Chesi, Stefano] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland; [Jungwirth, T.; Sinova, Jairo] Inst Phys ASCR, Vvi, Prague 16253 6, Czech Republic; [Jungwirth, T.] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England; [Sinova, Jairo] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA; [Sinova, Jairo; Vignale, G.; Polini, Marco] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China; [Vignale, G.] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA
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.
资助者: European Community [215368]; Czech Republic [AV0Z10100521, KAN400100652, LC510]; NSF [DMR-0547875, DMR-0705460]; Preamium Academiae
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000288896400005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14389
Appears in Collections:理论物理所2011年知识产出_期刊论文

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Recommended Citation:
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.
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