dc.contributor.author | D'Amico, Irene | eng |
dc.contributor.author | Vignale, Giovanni, 1957- | eng |
dc.date.issued | 2003 | eng |
dc.description | URL:http://link.aps.org/doi/10.1103/PhysRevB.68.045307
DOI:10.1103/PhysRevB.68.045307 | eng |
dc.description.abstract | We calculate the spin-drag transresistivity r "#(T) in a two-dimensional electron gas at temperature T in the random-phase approximation. In the low-temperature regime we show that, at variance with the threedimensional low-temperature result @r "#(T);T2#, the spin transresistivity of a two-dimensional spin unpolarized electron gas has the form r "#(T);T2ln T. In the spin-polarized case the familiar form r "#(T)5AT2 is recovered, but the constant of proportionality, A, diverges logarithmically as the spin-polarization tends to zero.
In the high-temperature regime we obtain r "#(T)52(\/e2)(p2Ry*/kBT) ~where Ry* is the effective Rydberg energy! independent of the density. Again, this differs from the three-dimensional result, which has a
logarithmic dependence on the density. Two important differences between the spin-drag transresistivity and the ordinary Coulomb-drag transresistivity are pointed out. ~i! The ln T singularity at low temperature is smaller, in the Coulomb-drag case, by a factor e24kFd, where kF is the Fermi wave vector and d is the separation between the layers. ~ii! The collective mode contribution to the spin-drag transresistivity is negligible at all temperatures. Moreover, the spin-drag effect is, for comparable parameters, larger than the ordinary Coulomb-drag effect. | eng |
dc.description.sponsorship | We gratefully acknowledge support from NSF Grant No. DMR-0074959. | eng |
dc.identifier.citation | Phys. Rev. B 68, 045307 (2003) | eng |
dc.identifier.issn | 1098-0121 | eng |
dc.identifier.uri | http://hdl.handle.net/10355/7789 | eng |
dc.language | English | eng |
dc.publisher | American Physical Society | 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 | spin polarized transport in semiconductors | eng |
dc.subject.lcsh | Electron transport | eng |
dc.subject.lcsh | Spintronics | eng |
dc.subject.lcsh | Polarization (Nuclear physics) | eng |
dc.subject.lcsh | Magnetic semiconductors | eng |
dc.subject.lcsh | Scattering (Physics) | eng |
dc.title | Spin Coulomb drag in the two-dimensional electron liquid | eng |
dc.type | Article | eng |