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18 papers · 1 filter
Influence of flat bands on RKKY interaction: perspective of Fano defects
Yue-De Luo, Min-Fong Yang
In this paper, we revisit the effect of flat bands on the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction by using a coordinate transformation that detangles flat-band states from…
Correlated second-order Dirac semimetals with Coulomb interactions
Yu-Wen Lee, Yu-Li Lee
We investigate the effects of long range Coulomb interactions on the low-temperature properties of a second-order Dirac semimetal in terms of the renormalization group. In contrast…
Efficient n-type Doping in Epitaxial Graphene through Strong Lateral Orbital Hybridization of Ti Adsorbate
Jhih-Wei Chen, Hao-Chun Huang, Domenica Convertino +10
In recent years, various doping methods for epitaxial graphene have been demonstrated through atom substitution and adsorption. Here we observe by angle-resolved photoemission spec…
Chiral magnetic effect in the absence of Weyl node
Ming-Che Chang, Min-Fong Yang
The nodal points in a Weyl semimetal are generally considered as the causes of the chiral anomaly and the chiral magnetic effect (CME). Employing a linear-response analysis of a tw…
Electrical control and interaction effects of the RKKY interaction in helical liquids
Yu-Wen Lee, Yu-Li Lee
We study the RKKY interaction mediated by the helical edge states of a quantum spin Hall insulator in the presence of the Rashba spin-orbital coupling induced by an external electr…
Chiral magnetic effect in two-band lattice model of Weyl semimetal
Ming-Che Chang, Min-Fong Yang
Employing a two-band model of Weyl semimetal, the existence of the chiral magnetic effect (CME) is established within the linear-response theory. The crucial role played by the lim…