Classical generalization of the Drude formula for the optical conductivity

Smith, N. V.

doi:10.1103/physrevb.64.155106

Cited by 563 publications

(354 citation statements)

References 23 publications

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“…2E) and conductivity ( Fig. 2F) decreasing with photon energy, as expected for free electron optical character (9,11,18,32,33), these quantities increase. Optical conductivity is high compared with the DC conductivity but of similar magnitude.…”

Section: Significancementioning

confidence: 56%

“…2F), which reproduces the weakly increasing conductivity from DC to optical frequencies and predicts a maximum in conductivity at finite frequency. Such features also characterize other warm dense matter near metallization transitions, including hydrogen (36), aluminum (37), and mercury (32). Indirect-gap (18) and Tauc (33) absorption behaviors, known to occur in rare gas solid and disordered semiconductors, respectively, could not describe these data selfconsistently (SI Text).…”

Section: Discussionmentioning

confidence: 80%

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Opacity and conductivity measurements in noble gases at conditions of planetary and stellar interiors

McWilliams

Dalton

Konôpková

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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The noble gases are elements of broad importance across science and technology and are primary constituents of planetary and stellar atmospheres, where they segregate into droplets or layers that affect the thermal, chemical, and structural evolution of their host body. We have measured the optical properties of noble gases at relevant high pressures and temperatures in the laserheated diamond anvil cell, observing insulator-to-conductor transformations in dense helium, neon, argon, and xenon at 4,000-15,000 K and pressures of 15-52 GPa. The thermal activation and frequency dependence of conduction reveal an optical character dominated by electrons of low mobility, as in an amorphous semiconductor or poor metal, rather than free electrons as is often assumed for such wide band gap insulators at high temperatures. White dwarf stars having helium outer atmospheres cool slower and may have different color than if atmospheric opacity were controlled by free electrons. Helium rain in Jupiter and Saturn becomes conducting at conditions well correlated with its increased solubility in metallic hydrogen, whereas a deep layer of insulating neon may inhibit core erosion in Saturn.rare gases | extreme conditions | warm dense matter | giant planet | white dwarf

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Section: Significancementioning

confidence: 56%

Section: Discussionmentioning

confidence: 80%

Opacity and conductivity measurements in noble gases at conditions of planetary and stellar interiors

McWilliams

Dalton

Konôpková

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

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“…(2) By assuming only one backscattering of free carriers, complex conductivity shows the Lorentz-type behavior, which is called the generalized Drude model or the Drude-Smith (DS) model [21]. As the DS model has been most widely used to explain the non-Drude behavior [1], we summarize here the DS approach.…”

Section: Dynamics Of Free Carriers In Nanomaterialsmentioning

confidence: 99%

“…As the DS model has been most widely used to explain the non-Drude behavior [1], we summarize here the DS approach. A complex conductivity given by Smith [21] is given as:…”

Section: Dynamics Of Free Carriers In Nanomaterialsmentioning

confidence: 99%

Dynamics of Carrier Transport in Nanoscale Materials: Origin of Non-Drude Behavior in the Terahertz Frequency Range

Shimakawa

Kasap

2016

Applied Sciences

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Abstract:It is known that deviation from the Drude law for free carriers is dramatic in most electronically conductive nanomaterials. We review recent studies of the conductivity of nanoscale materials at terahertz (THz) frequencies. We suggest that among a variety of theoretical formalisms, a model of series sequence of transport involving grains and grain boundaries provides a reasonable explanation of Lorentz-type resonance (non-Drude behavior) in nanomaterials. Of particular interest is why do free carriers exhibit a Lorentz-type resonance.

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“…It considers also quantum [9] and relativistic [10] effects, the quantum relativistic step is in progress [11]. The comparison with existing utilized models, as Drude-Lorentz and Smith models [12] and the utilization of existing experimental data have demonstrated a very good fit with current knowledge [13][14][15][16][17][18][19] (Figure 1). …”

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confidence: 99%

Advances in Analytical Modelling for Nano-Bio-Technology

Sia¹

2015

J Nanosci Adv Tech

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Nano-bio-technology is one of the most important mainstreams of current world research; improvements in creation and increase of nano-devices performance are a primary objective of pure research and applied technology. The devices sensitivity is an essential characteristic, for determining a great increase of their quality; various ideas and techniques are considered in this direction. A new appeared theoretical analytical model for the study of transport dynamics is able to accommodate previously not completely understood behaviours and indicates precise ways for calibrate and improve the device performance.

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Classical generalization of the Drude formula for the optical conductivity

Cited by 563 publications

References 23 publications

Opacity and conductivity measurements in noble gases at conditions of planetary and stellar interiors

Opacity and conductivity measurements in noble gases at conditions of planetary and stellar interiors

Dynamics of Carrier Transport in Nanoscale Materials: Origin of Non-Drude Behavior in the Terahertz Frequency Range

Advances in Analytical Modelling for Nano-Bio-Technology

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