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Elastic scattering of light in polaron gas

Упругое рассеяние света в газе поляронов

  • Published:
Il Nuovo Cimento B (1971-1996)

Summary

In this work we study the elastic scattering of light with the single-particle excitation by a system of electrons interacting with phonons—a polaron gas or liquid. We observe a significant enhancement of the scattering due to the strong electron-phonon coupling. The order of this enhancement effect depends on the polarization properties of the incident and scattering lights. We also prove that due to a Wardtype identity the contribution of theA 2-term in the Hamiltonian to the scattering amplitude is not affected by the electron-phonon interaction.

Riassunto

In questo lavoro si studia lo scattering elastico della luce con eccitazione a particella singola da parte di un sistema di elettroni interagenti con i fononi—un gas o un liquido di polaroni. Si osserva un significativo aumento dello scattering dovuto al forte accoppiamento elettrone-fonone. L'ordine di questo effetto di aumento dipende dalle proprietà di polarizzazione della luce incidente e dispersa. Si prova anche che per un'identità del tipo di Ward il contributo del termineA 2 nell'hamiltonianaa ll'ampiezza di scattering non è influenzato dall'interazione elettrone-fonone.

Резюме

В этой работе мы исследуем упругое рассеяние света на одночастичных возбуждениях системы электронов, взаимодействующих с фононами, т.е. на газе или жидкости поляронов. Мы обнаружили существенное увеличение рассеяния, обусловленное сильной электрон-фононной связью. Порядок этого увеличения зависит от свойств поляризации падающего и рассеянного света. Мы также доказываем, что благодаря тождеству типа Уорда вклад членаA 2 в Гамильтониане в амплитуду рассеяния не зависит от электрон-фононного взаимодействия.

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Authors and Affiliations

  1. Institute of Physics, Nghia Do Tu Liem, Hanoi, Vietnam

    Nguyen Ba An, Nguyen Van Hieu, Nguyen Toan Thang & Nguyen Ai Viet

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  1. Nguyen Ba An
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  2. Nguyen Van Hieu
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  3. Nguyen Toan Thang
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  4. Nguyen Ai Viet
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Nguyen, B.A., Nguyen, V.H., Nguyen, T.T. et al. Elastic scattering of light in polaron gas. Nuov Cim B 52, 267–276 (1979). https://doi.org/10.1007/BF02739040

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  • DOI: https://doi.org/10.1007/BF02739040

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