https://doi.org/10.1140/epjp/s13360-022-03016-8
Regular Article
Transport characteristics of a 
-symmetric non-Hermitian system: effect of environmental interaction
1
Department of Physics, School of Applied Sciences, University of Science and Technology Meghalaya, 793101, Ri-Bhoi, India
2
Physics and Applied Mathematics Unit, Indian Statistical Institute, 203 Barrackpore Trunk Road, 700108, Kolkata, India
Received:
13
October
2021
Accepted:
27
June
2022
Published online:
6
July
2022
The environmental influence is inevitable but often ignored in the study of electronic transport properties of small-scale systems. Such an environment-mediated interaction can generally be described by a parity-time symmetric non-Hermitian system with a balanced distribution of physical gain and loss. It is quite known in the literature that along with the conventional junction current, another current called bias-driven circular current can be established in a loop geometry depending upon the junction configuration. This current, further, induces a strong magnetic field that can even reach few tesla. What will happen to these quantities when the system interacts with its surrounding environment? Would it exhibit a detrimental response? We address such issues considering a two-terminal ring geometry where the junction setup is described within a tight-binding framework. All the transport quantities are evaluated using the standard Green’s function formalism based on the Landauer–Büttiker approach.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022
