dc.contributor.author | Agarwal, Amit | eng |
dc.contributor.author | Chesi, Stefano | eng |
dc.contributor.author | Jungwirth, T. | eng |
dc.contributor.author | Sinova, Jairo | eng |
dc.contributor.author | Vignale, Giovanni, 1957- | eng |
dc.contributor.author | Polini, Marco | eng |
dc.date.issued | 2010 | eng |
dc.description | http://arxiv.org/PS_cache/arxiv/pdf/1010/1010.5169v1.pdf | eng |
dc.description.abstract | 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 Galileian 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 focussed 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. | eng |
dc.description.sponsorship | A.A., T.J., and M.P. gratefully acknowledge funding from the European Community's Seventh Framework Programme (FP7/2007-2013) under grant agreement n. 215368 (SemiSpinNet). T.J. also acknowledges support from Czech Republic Grants AV0Z10100521, KAN400100652, LC510, and Preamium Academiae. J.S. was supported by NSF grant No. DMR-0547875 and by the Research Corporation Cottrell Scholar Award. G.V.
was supported by the National Science Foundation under grant number DMR-0705460. | eng |
dc.identifier.citation | arXiv:1010.5169v1 | eng |
dc.identifier.uri | http://hdl.handle.net/10355/9991 | eng |
dc.language | English | eng |
dc.publisher | arXiv | eng |
dc.relation.ispartofcollection | University of Missouri--Columbia. College of Arts and Sciences. Department of Physics and Astronomy. Physics and Astronomy publications | eng |
dc.subject.lcsh | Nanoscience | eng |
dc.subject.lcsh | Electron configuration | eng |
dc.subject.lcsh | Condensed matter | eng |
dc.title | Plasmon mass and Drude weight in strongly spin-orbit-coupled 2D electron gases | eng |
dc.type | Article | eng |