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DC Field | Value | Language |
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dc.contributor.author | Roy, Dibyendu | - |
dc.contributor.author | Dhar, Abhishek | - |
dc.date.accessioned | 2007-06-26T10:52:58Z | - |
dc.date.available | 2007-06-26T10:52:58Z | - |
dc.date.issued | 2007-05-11 | - |
dc.identifier.citation | Physical Review B, 2007, Vol.75, p195110 | en |
dc.identifier.issn | 1098-0121 | - |
dc.identifier.issn | 1550-235X (online) | - |
dc.identifier.uri | http://hdl.handle.net/2289/3150 | - |
dc.description | Open Access. | en |
dc.description.abstract | We present an extension of the work of D'Amato and Pastawski [Phys. Rev. B 41, 7411 (1990)] on electron transport in a one dimensional conductor modeled by the tight-binding lattice Hamiltonian and in which inelastic scattering is incorporated by connecting each site of the lattice to one dimensional leads. This model incorporates Büttiker's [Phys. Rev. B 32, 1846 (1985); 23, 3020 (1986)] original idea of dephasing probes. Here, we consider finite temperatures and study both electrical and heat transport across a chain with applied chemical potential and temperature gradients. Our approach involves quantum Langevin equations and nonequilibrium Green's functions. In the linear-response limit, we are able to solve the model exactly and obtain expressions for various transport coefficients. Standard linear-response relations are shown to be valid. We also explicitly compute the heat dissipation and show that for wires of length N>>[script-l], where [script-l] is a coherence length scale, dissipation takes place uniformly along the wire. For N<<[script-l], when transport is ballistic, dissipation is mostly at the contacts. In the intermediate range between Ohmic and ballistic transport, we find that the chemical-potential profile is linear in the bulk with sharp jumps at the boundaries. These are explained using a simple model where the left and right moving electrons behave as persistent random walkers. | en |
dc.format.extent | 337621 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | en | en |
dc.publisher | American Physical Society | en |
dc.relation.uri | http://link.aps.org/abstract/PRB/v75/e195110 | en |
dc.relation.uri | http://dx.doi.org/10.1103/PhysRevB.75.195110 | en |
dc.rights | 2007 American Physical Society | en |
dc.title | Electron transport in a one dimensional conductor with inelastic scattering by self-consistent reservoirs | en |
dc.type | Article | en |
Appears in Collections: | Research Papers (TP) |
Files in This Item:
File | Description | Size | Format | |
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2007 PR-B V75 p195110.pdf Restricted Access | Open Access | 329.71 kB | Adobe PDF | View/Open Request a copy |
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