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000012869 005__ 20240818233704.0
000012869 02470 $$ahttps://doi.org/10.1038/s42005-024-01729-z$$2doi
000012869 037__ $$aTEXTUAL
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000012869 245__ $$aEnhancing shift current response via virtual multiband transitions
000012869 269__ $$a2024-07-20
000012869 336__ $$aArticle
000012869 520__ $$aMaterials exhibiting a significant shift current response could potentially outperform conventional solar cell materials. The myriad of factors governing shift-current response, however, poses significant challenges in finding such strong shift-current materials. Here we propose a general design principle that exploits inter-orbital mixing to excite virtual multiband transitions in materials with multiple flat bands to achieve an enhanced shift current response. We further relate this design principle to maximizing Wannier function spread as expressed through the formalism of quantum geometry. We demonstrate the viability of our design using a 1D stacked Rice-Mele model. Furthermore, we consider a concrete material realization - alternating angle twisted multilayer graphene (TMG) - a natural platform to experimentally realize such an effect. We identify a set of twist angles at which the shift current response is maximized via virtual transitions for each multilayer graphene and highlight the importance of TMG as a promising material to achieve an enhanced shift current response at terahertz frequencies. Our proposed mechanism also applies to other 2D systems and can serve as a guiding principle for designing multiband systems that exhibit an enhanced shift current response.
000012869 536__ $$oCalifornia Institute of Technology$$aSummer Undergraduate Research Fellowship
000012869 536__ $$oNational Science Foundation$$cDMR-1720595
000012869 536__ $$oSimons Foundation
000012869 536__ $$oARO MURI$$cW911NF-16-1- 0361
000012869 536__ $$oFlorida State University$$astart-up funds
000012869 540__ $$a&lt;p&gt;© The Author(s) 2024&lt;/p&gt; &lt;p&gt;This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit &lt;a href="http://creativecommons.org/licenses/by/4.0/" target="_blank"&gt;http://creativecommons.org/licenses/by/4.0/&lt;/a&gt;.&lt;/p&gt;
000012869 542__ $$fCC BY
000012869 594__ $$a&lt;p&gt;The data that support the findings of this study are available from the corresponding author upon reasonable request.&lt;/p&gt;
&lt;p&gt;The code that supports the findings of this study is available from the corresponding author upon reasonable request.&lt;/p&gt;
000012869 690__ $$aPhysical Sciences Division
000012869 691__ $$aKadanoff Center for Theoretical Physics
000012869 7001_ $$1http://orcid.org/0009-0009-4116-2720$$2ORCID$$aChen, Sihan$$uUniversity of Chicago
000012869 7001_ $$aChaudhary, Swati$$uUniversity of Texas at Austin
000012869 7001_ $$aRefael, Gil$$uCalifornia Institute of Technology
000012869 7001_ $$1http://orcid.org/0000-0002-6944-9805$$2ORCID$$aLewandowski, Cyprian$$uNational High Magnetic Field Laboratory
000012869 773__ $$tCommunications Physics
000012869 789__ $$eIs Supplemented By$$whttps://doi.org/10.1038/s42005-024-01771-x
000012869 8564_ $$yArticle$$993e6f2e9-23ca-400d-988c-489a6d53bebf$$s841805$$uhttps://knowledge.uchicago.edu/record/12869/files/Enhancing-shift-current-response-via-virtual-multiband-transitions.pdf$$ePublic
000012869 8564_ $$ySupplementary information files$$9d74604d5-c72a-4cfc-95de-63ff9520ec0f$$s5815380$$uhttps://knowledge.uchicago.edu/record/12869/files/Supplementary-information.zip$$ePublic
000012869 8564_ $$yAuthor correction$$96d9ecf4c-734e-43d8-b530-6b57213eff86$$s227649$$uhttps://knowledge.uchicago.edu/record/12869/files/Enhancing-shift-current-response-via-virtual-multiband-transitions-Correction.pdf$$ePublic
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