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Ballistic and shift currents in the bulk photovoltaic effect theory


Institute of Automation and Electrometry, Siberian Branch of the Russian Academy of Sciences, prosp. akad. Koptyuga 1, Novosibirsk, 630090, Russian Federation

The bulk photovoltaic effect (BPVE) — the generation of electric currents by light in noncentrosymmetric materials in the absence of electric fields and gradients — was intensively investigated at the end of the last century. The outcomes, including all main aspects of this phenomenon, were summarized in reviews and books. A new upsurge of interest in the BPVE has occurred recently, resulting in a flood of misleading theoretical and experimental publications centered around the so-called shift current. Numerous top-rated recent publications ignore the basic principles of charge-transport phenomena and the previous results of joint experimental-theoretical studies. Specifically, dominating (or substantial) contributions to currents caused by asymmetry of the momentum distributions of electrons and holes are missed. The wide-spread basis relation for the shift current ignores the kinetic processes of relaxation and recombination of photo-excited electrons and leads to non-vanishing shift currents in thermal equilibrium. The goals of this methodical note is to specify and argue the benchmarks of the BPVE theory and return studies to the right track in the interest of developing photovoltaic devices.

Fulltext pdf (621 KB)
Fulltext is also available at DOI: 10.3367/UFNe.2019.06.038578
Keywords: media without central symmetry, bulk photovoltaic effect, polarization properties, ballistic currents, shift currents, kinetic processes, photoexcitation asymmetry
PACS: 03.65.−w, 72.10.Bg, 72.10.−d, 72.40.+w, 73.50.Gr (all)
DOI: 10.3367/UFNe.2019.06.038578
URL: https://ufn.ru/en/articles/2020/4/g/
000555762600007
2-s2.0-85091398978
2020PhyU...63..407S
Citation: Sturman B I "Ballistic and shift currents in the bulk photovoltaic effect theory" Phys. Usp. 63 407–411 (2020)
BibTexBibNote ® (generic)BibNote ® (RIS) MedlineRefWorks
PT Journal Article
TI Ballistic and shift currents in the bulk photovoltaic effect theory
AU Sturman B I
FAU Sturman BI
DP 10 Apr, 2020
TA Phys. Usp.
VI 63
IP 4
PG 407-411
RX 10.3367/UFNe.2019.06.038578
URL https://ufn.ru/en/articles/2020/4/g/
SO Phys. Usp. 2020 Apr 10;63(4):407-411

Received: 9th, May 2019, revised: 10th, June 2019, 5th, June 2019

Оригинал: Стурман Б И «Баллистический и сдвиговый токи в теории фотогальванического эффекта» УФН 190 441–445 (2020); DOI: 10.3367/UFNr.2019.06.038578

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