Joule heat in point contacts

Rokni, M.; Levinson, Y.

doi:10.1103/physrevb.52.1882

Cited by 26 publications

(41 citation statements)

References 18 publications

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“…Notably, resistance and dissipation in nanosystems can be dominated by spatially separated parts of the system. Such a "heat-resistance separation" is particularly prominent in ultraclean structures, as was discussed in detail in the seminal paper [1] for the case of a point contact. The derivation in Ref.…”

Section: Introductionmentioning

confidence: 98%

Asymmetry of nonlocal dissipation: From drift-diffusion to hydrodynamics

et al. 2019

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We study dissipation in inhomogeneous two-dimensional electron systems. We predict a relatively strong current-induced spatial asymmetry in the heating of the electron and phonon systems -even if the inhomogeneity responsible for the electrical resistance is symmetric with respect to the current direction. We also show that the heat distributions in the hydrodynamic and impurity-dominated limits are essentially different. In particular, within a wide, experimentally relevant interval of driving fields, the dissipation profile in the hydrodynamic limit turns out to be asymmetric, and the characteristic spatial scale of the temperature distribution can be controlled by the driving field. By contrast, in the same range of parameters, impurity-dominated heating is almost symmetric, with the size of the dissipation region being independent of the field. This allows one to distinguish experimentally the hydrodynamic and impurity-dominated limits. Our results are consistent with recent experimental findings on transport and dissipation in narrow constrictions and quantum point contacts.arXiv:1906.03832v2 [cond-mat.mes-hall]

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Section: Introductionmentioning

confidence: 98%

Asymmetry of nonlocal dissipation: From drift-diffusion to hydrodynamics

et al. 2019

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“…Kulik, Shekhter, and Omelyanchouk [3] pointed out that the processes responsible for electri cal resistance of the contact and heat generation are spatially separated. The spatial distribution of the Joule heat generated by the electric current passing through a semiconductor point contact in the diffusive limit was discussed by Rokni and Levinson [4].…”

Section: Release Of the Joule Heat Upon Passage Of The Electric Currementioning

confidence: 99%

Release of the Joule heat upon passage of the electric current in nanostructures (a review)

Гуревич

Muradov

2012

Phys. Solid State

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The generation of the Joule heat upon collisionless passage of the direct and alternating electric currents in semiconductor quantum wires connecting two classical reservoirs has been discussed. The trans verse dimension of the quantum wire is of the order of the de Broglie wavelength of conduction electrons. The spatial distribution of the Joule heat has been considered. The heat is released in the reservoirs at a distance of the electron mean free path. The total production of the Joule heat has been found to be identical in both reservoirs.

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“…Indeed, heat dissipation, and not circuitry, has already limited the clock speed of microprocessors. 1 The characteristics of Joule heat are fundamentally different for diffusive and ballistic transport, in which the structural length scale is, respectively, larger or smaller than that of the carrier mean free path l. [2][3][4][5][6][7][8][9] Since l is less than 100 nm for most materials, most electronic devices to date operate in the diffusive limit, for which the behavior of diffusive heat transport is well known. In contrast, ballistic heat transport, which will prevail in nanoscale ballistic charge-and spin-based devices, remains poorly understood theoretically or experimentally.…”

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confidence: 99%

“…Some have suggested that ballistic transport would generate little Joule heat except those transmitted from adjacent regions due to diffusive scattering. [4][5][6][7] Others have proposed that ballistic heat can be generated within the contact by oscillating defects 17,18 and atoms. 2,3 Regardless of the basic mechanisms, there are ample indications 17-20 that the characteristics of ballistic heat transport are quite different from those of diffusive heat transport.…”

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Ballistic heat transport in nanocontacts

et al. 2010

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We have determined the ballistic heat transport relation of V 2 = C͑T m − T͒ in nanocontacts involving the bias voltage V, the ambient temperature T, and the maximum temperature T m inside the contact by exploiting the ordering temperature of a magnetic solid as a natural thermometer. The relation has been further established using a single contact at one temperature but different magnetic fields. A simple energy-transfer model incorporating ballistic transport can qualitatively account for this relation. We also demonstrate a ballistic transport method for determining the ordering temperatures of magnets.

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Joule heat in point contacts

Cited by 26 publications

References 18 publications

Asymmetry of nonlocal dissipation: From drift-diffusion to hydrodynamics

Asymmetry of nonlocal dissipation: From drift-diffusion to hydrodynamics

Release of the Joule heat upon passage of the electric current in nanostructures (a review)

Ballistic heat transport in nanocontacts

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