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Article: Quantifying the photocurrent fluctuation in quantum materials by shot noise
Title | Quantifying the photocurrent fluctuation in quantum materials by shot noise |
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Authors | |
Issue Date | 5-Mar-2024 |
Publisher | Nature Research |
Citation | Nature Communications, 2024, v. 15, n. 1, p. 1-8 How to Cite? |
Abstract | The DC photocurrent can detect the topology and geometry of quantum materials without inversion symmetry. Herein, we propose that the DC shot noise (DSN), as the fluctuation of photocurrent operator, can also be a diagnostic of quantum materials. Particularly, we develop the quantum theory for DSNs in gapped systems and identify the shift and injection DSNs by dividing the second-order photocurrent operator into off-diagonal and diagonal contributions, respectively. Remarkably, we find that the DSNs can not be forbidden by inversion symmetry, while the constraint from time-reversal symmetry depends on the polarization of light. Furthermore, we show that the DSNs also encode the geometrical information of Bloch electrons, such as the Berry curvature and the quantum metric. Finally, guided by symmetry, we apply our theory to evaluate the DSNs in monolayer GeS and bilayer MoS2 with and without inversion symmetry and find that the DSNs can be larger in centrosymmetric phase. |
Persistent Identifier | http://hdl.handle.net/10722/347370 |
ISSN | 2023 Impact Factor: 14.7 2023 SCImago Journal Rankings: 4.887 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Xiang, Longjun | - |
dc.contributor.author | Jin, Hao | - |
dc.contributor.author | Wang, Jian | - |
dc.date.accessioned | 2024-09-21T00:31:35Z | - |
dc.date.available | 2024-09-21T00:31:35Z | - |
dc.date.issued | 2024-03-05 | - |
dc.identifier.citation | Nature Communications, 2024, v. 15, n. 1, p. 1-8 | - |
dc.identifier.issn | 2041-1723 | - |
dc.identifier.uri | http://hdl.handle.net/10722/347370 | - |
dc.description.abstract | <p>The DC photocurrent can detect the topology and geometry of quantum materials without inversion symmetry. Herein, we propose that the DC shot noise (DSN), as the fluctuation of photocurrent operator, can also be a diagnostic of quantum materials. Particularly, we develop the quantum theory for DSNs in gapped systems and identify the shift and injection DSNs by dividing the second-order photocurrent operator into off-diagonal and diagonal contributions, respectively. Remarkably, we find that the DSNs can not be forbidden by inversion symmetry, while the constraint from time-reversal symmetry depends on the polarization of light. Furthermore, we show that the DSNs also encode the geometrical information of Bloch electrons, such as the Berry curvature and the quantum metric. Finally, guided by symmetry, we apply our theory to evaluate the DSNs in monolayer GeS and bilayer MoS<sub>2</sub> with and without inversion symmetry and find that the DSNs can be larger in centrosymmetric phase.<br></p> | - |
dc.language | eng | - |
dc.publisher | Nature Research | - |
dc.relation.ispartof | Nature Communications | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.title | Quantifying the photocurrent fluctuation in quantum materials by shot noise | - |
dc.type | Article | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1038/s41467-024-46264-1 | - |
dc.identifier.scopus | eid_2-s2.0-85186856747 | - |
dc.identifier.volume | 15 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | 1 | - |
dc.identifier.epage | 8 | - |
dc.identifier.eissn | 2041-1723 | - |
dc.identifier.isi | WOS:001180394600016 | - |
dc.identifier.issnl | 2041-1723 | - |