Work

Zero bias conductance peak related to spin triplet states in noncollinear magnetized graphene superconducting junctions

Year: 2025

Type: article

Abstract: We investigated the zero-bias conductance peak in a graphene-based ferromagnet/ferromagnet/barrier/d-wave superconductor (F/F/B/d-wave SC) heterojunction. Our research indicates that the spin-triplet pairing states induced by non-collinear magnetizations do not lead to the splitting of the zero-bias conductance peak (ZBCP), and the anomalous Andreev reflection makes a significant contribution to the ZBCP. In the case of half-metal, the triplet bound states appear at zero incident energy due to Klein tunneling, which is coincide with the singlet bound states, resulting in the ZBCP arises solely due to spin-triplet pairing states. The ZBCP can be modulated by the exchange field strength, Fermi level and magnetizations angle. These findings offer deeper understanding of the influence of non-collinear magnetizations on anomalous Andreev reflection in graphene-based F/F/B/d-wave SC heterojunctions and hold promise for the development of graphene-based superconducting spintronic devices.

Source: Scientific Reports

DOI: 10.1038/s41598-025-98541-8

Authors: Chuan Tan, Qingping Wu, Haoran Li, Zhengfang Liu, Xianbo Xiao

Institutions: East China Jiaotong University, Jiangxi University of Traditional Chinese Medicine

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,690

Funders: National Natural Science Foundation of China, Natural Science Foundation of Jiangxi Province