Ultrafast observation of electron hybridization and in-gap states formation in Kondo insulator SmB6

Autor:	Adhikari, Sanjay, Ma, Yanjun, Fisk, Zachary, Xia, Jing, Eom, Chang-Beom, Cen, Cheng
Rok vydání:	2015
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
Popis:	SmB6 is a promising candidate for topological Kondo insulator. In this letter, we report ultrafast carrier dynamics of SmB6. Two characteristic temperatures: T1=100 K and T2= 20 K are observed. T1 corresponds to the opening of the f-d hybridization gap revealed by an abrupt disappearance of terahertz f-band plasmon oscillations. Between T1 and T2, a phonon bottleneck effect dominates the photocarrier relaxation processes. Below T2, we observe the formation of in-gap states, which are strongly affected by optically injected hot electrons and the transient electron temperature change.
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1502.04441 Zobrazit plný text záznamu View this record from Arxiv