Journal
PHYSICAL REVIEW B
Volume 104, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.104.L100501
Keywords
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Funding
- National Research Foundation of Korea (NRF) - Ministry of Education [2020R1A6A3A03037129]
- Center for Advancement of Topological Semimetals, an Energy Frontier Research Center - U.S. Department of Energy Office of Science, Office of Basic Energy Sciences, through the Ames Laboratory [DE-AC02-07CH11358]
- JST CREST, Japan [JPMJCR1874, JPMJCR16F1]
- JSPS KAKENHI [18H03676]
- National Research Foundation of Korea [2020R1A6A3A03037129] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Optical spectral weight transfer associated with the onset of superconductivity at high-energy scales has been observed in multiple systems, with debates on its origin ongoing but a consensus that it is due to strong correlation effects beyond the BCS theory. Additionally, another route to a nonzero spectral weight transfer based on the quantum geometry of the conduction band in multiband systems has been shown.
Optical spectral weight transfer associated with the onset of superconductivity at high-energy scales compared with the superconducting gap has been observed in several systems such as high-T, cuprates. While there are still debates on the origin of this phenomenon, a consensus is that it is due to strong correlation effects beyond the BCS theory. Here, we show that there is another route to a nonzero spectral weight transfer based on the quantum geometry of the conduction band in multiband systems. We discuss applying this idea to the cuprates and twisted multilayer graphene.
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