https://doi.org/10.1140/epjc/s10052-020-8177-2
Regular Article - Theoretical Physics
Doped holographic fermionic system
1
Department of Physics, School of Mathematics and Physics, Bohai University, Jinzhou, 121013, China
2
Center for Gravitation and Cosmology, College of Physical Science and Technology, Yangzhou University, Yangzhou, 225009, China
3
School of Physics and Electronic Information, Yunnan Normal University, Kunming, 650500, China
* e-mail: jianpinwu@yzu.edu.cn
Received:
2
February
2020
Accepted:
22
June
2020
Published online:
6
July
2020
We construct a two-current model. It includes two gauge fields, which introduce the doping effect, and a neutral scalar field. And then we numerically construct an AdS black brane geometry with scalar hair. Over this background, we study the fermionic system with the pseudoscalar Yukawa coupling. Some universal properties from the pseudoscalar Yukawa coupling are revealed. In particular, as the coupling increases, there is a transfer of the spectral weight from the low energy band to the high energy band. The transfer is over low energy scales but not over all energy scales. The peculiar properties are also explored. The study shows that with the increase of the doping, the gap opens more difficult. It indicates that there is a competition between the pseudoscalar Yukawa coupling and the doping.
© The Author(s), 2020
