Parth Emil, Corradini Andrea, Cui Weili, Romanin Davide, Schuster Christin, Freytag Clara, Shi Lei, Yanagi Kazuhiro, Calandra Matteo, Pichler Thomas
Faculty of Physics, University of Vienna, Bolzmanngasse 5, Vienna, 1090, Austria.
Department of Physics, University of Trento, Via Sommarive 14, Povo, Trento, 38123 TN, Italy.
Nat Commun. 2025 May 26;16(1):4797. doi: 10.1038/s41467-025-59863-3.
The resonant Raman response is due to electronic and vibrational excitations. Confined carbyne is a novel one dimensional heterostructure consisting of the linear carbon chain and a hosting carbon nanotube in the bulk limit. The resonant Raman fingerprint of confined carbyne comes concomitant with several new features which can neither be assigned to the hosting tube, nor to the linear carbon chain. This identifies the tube-chain system as a true hybrid structure in which the spectrum is usually driven by modifications in the electronic excitations via charge transfer. We show that the electronic structure results from those of the two isolated systems and the spectral modifications are solely due to the anharmonic interactions between the tube and the chain. Our work establishes confined carbyne as the ideal test system to probe anharmonicity in one dimension and its implications on the resonant Raman response.
共振拉曼响应源于电子和振动激发。受限卡宾是一种新型的一维异质结构，在体极限下由线性碳链和主体碳纳米管组成。受限卡宾的共振拉曼指纹伴随着几个新特征，这些特征既不能归因于主体管，也不能归因于线性碳链。这表明管链系统是一种真正的混合结构，其光谱通常由电荷转移引起的电子激发变化所驱动。我们表明，电子结构源于两个孤立系统的结构，光谱变化完全是由于管和链之间的非谐相互作用。我们的工作将受限卡宾确立为探测一维非谐性及其对共振拉曼响应影响的理想测试系统。
