Verifying the Drude response

Dressel, Martin; Scheffler, Marc

doi:10.1002/andp.200510198

Cited by 68 publications

(66 citation statements)

References 42 publications

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“…See, for example, Figure 3 from Reference [6] where we can observe that the shape of the experimental points, in the low frequency region, is better comparable to that obtained from Lindhard model.…”

Section: Results and Remarkssupporting

confidence: 65%

“…Despite its simplicity, the Drude model parameters has been utilized to fit experimental results [6], in particular in terahertz time-domain spectroscopy (THz-TDS) [7], which is a contactless technique in which the properties of solids are probed with short pulses of terahertz radiation. However, a more realistic description of the electron gas system requires a quantum mechanical model.…”

Section: Dielectric Function From the Drude Modelmentioning

confidence: 99%

“…Measurements of the complex conductivity of moderately doped semiconductors, using terahertz time-domain spectroscopy, has been widely reported [6,13,14].…”

Section: Conductivitymentioning

confidence: 99%

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Dielectric function for free electron gas: comparison between Drude and Lindhard models

Andrade-Neto

2016

Rev. Bras. Ensino Fís.

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The interaction between light and metals or heavily doped semiconductors is largely determined by their free conduction electrons. The frequency and wave vector dependent complex dielectric function is an essential ingredient of the description of its optical and transport properties. The aim of this paper is to give a didactic introduction how the conduction electrons in solids responds to an external time dependent electric field and to make a comparison between Drude and Lindhard dielectric function models for the electron gas. In within framework of Lindhard model we derived an expression for dielectric function that is similar to the familiar Drudes's formula. In particular, the differences and similarities between the complex conductivity obtained from the two models are analyzed. Keywords: dielectric function, Drude model, Lindhard model. As propriedades físicas de metais e semicondutores dopados são em grande parte determinadas pelos seus elétrons de condução. A função dielétricaé uma quantidade física fundamental no estudo das propriedadesóticas e de transporte desses materiais. Neste artigo discutimos de forma introdutória como os elétrons de condução em um sólido respondemà presença de um campo elétrico externo bem como realizamos uma comparação entre os modelos de Drude e de Lindhard no cálculo da função dielétrica de um gás de elétrons em um sólido. Em particular, as expressões para a condutividade complexa obtida dos dois modelos são analisadas e comparadas. Palavras-chave: função dielétrica, modelo de Drude, modelo de Lindhard.

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Section: Results and Remarkssupporting

confidence: 65%

Section: Dielectric Function From the Drude Modelmentioning

confidence: 99%

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Dielectric function for free electron gas: comparison between Drude and Lindhard models

Andrade-Neto

2016

Rev. Bras. Ensino Fís.

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“…The model, as discussed below, involves just a single relaxation parameter. Despite its simplicity, it has been verified for charge transport over a spectral range from MHz to the optical frequencies (Dressel and Scheffler, 2006) in various materials.…”

Section: Analysis Of Photoinduced Changes In the Dielectric Functionmentioning

confidence: 99%

Carrier dynamics in semiconductors studied with time-resolved terahertz spectroscopy

et al. 2011

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Time-resolved, pulsed terahertz spectroscopy has developed into a powerful tool to study charge carrier dynamics in semiconductors and semiconductor structures over the past decades. Covering the energy range from a few to about 100 meV, terahertz radiation is sensitive to the response of charge quasiparticles, e.g., free carriers, polarons, and excitons. The distinct spectral signatures of these different quasiparticles in the THz range allow their discrimination and characterization using pulsed THz radiation. This frequency region is also well suited for the study of phonon resonances and intraband transitions in low-dimensional systems. Moreover, using a pump-probe scheme, it is possible to monitor the nonequilibrium time evolution of carriers and low-energy excitations with sub-ps time resolution. Being an all-optical technique, terahertz time-domain spectroscopy is contact-free and noninvasive and hence suited to probe the conductivity of, particularly, nanostructured materials that are difficult or impossible to access with other methods. The latest developments in the application of terahertz time-domain spectroscopy to bulk and nanostructured semiconductors are reviewed.

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“…The crux of our model is how these dynamic quantities are modeled. The Lorentz and Drude models of material response are widely used to describe the THz frequency response of excited molecules and charge carriers [18]. These models can be expressed as the classical, damped, and driven masson-a-spring-like oscillator through the equation of motion:…”

Section: Fdtd Modeling Of Trts Experimentsmentioning

confidence: 99%

Finite-difference time-domain analysis of time-resolved terahertz spectroscopy experiments

2011

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In this paper we report on the numerical analysis of a time-resolved terahertz (THz) spectroscopy experiment using a modified finite-difference time-domain method. Using this method, we show that ultrafast carrier dynamics can be extracted with a time resolution smaller than the duration of the THz probe pulse and can be determined solely by the pump pulse duration. Our method is found to reproduce complicated two-dimensional transient conductivity maps exceedingly well, demonstrating the power of the time-domain numerical method for extracting ultrafast and dynamic transport parameters from time-resolved THz spectroscopy experiments. The numerical implementation is available online.

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Verifying the Drude response

Cited by 68 publications

References 42 publications

Dielectric function for free electron gas: comparison between Drude and Lindhard models

Dielectric function for free electron gas: comparison between Drude and Lindhard models

Carrier dynamics in semiconductors studied with time-resolved terahertz spectroscopy

Finite-difference time-domain analysis of time-resolved terahertz spectroscopy experiments

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