On the Shape of the "Petal" for the Dissipation Curve
April 23, 2018 | University of Nizhni NovgorodEstimated reading time: 1 minute
Topological insulators are new materials that have been studied by many research groups around the world for more than ten years. The main advantage of such materials is the presence (under certain symmetry conditions) of dissipationless states at the sample boundary, while the bulk material retains the properties of an insulator. In view of these properties, it is hoped that topological insulators can be used in advanced communications and information processing systems, as well as in quantum computing.
Many properties of topological insulators have by now been well described theoretically, some of them have been verified experimentally. The basic properties that still require comprehensive verification include the shape of the energy dissipation curve of the edge states in a topological insulator, depending on their quasimomentum components.
The law described by this curve underlies most of the observable and applied properties of the material, therefore it is very important to know its details. If, for example, we make a plot of the dissipation law for the electrons on the surface of the Bi2Te3 class compounds, it will resemble a flower with intricately shaped petals. The shape of the petals will contain information about the symmetry of the dissipation law, which directly affects the physical properties of the electron gas.
Researchers at the UNN Faculty of Physics have long been engaged in the study of topological insulators. Recently, work has been completed on the impact of the dissipation law symmetry for electrons on the Bi2Te3 surface on the observed properties of this material. According to Associate Professor of the Department of Theoretical Physics Denis Khomitsky, researchers were able to show that the shape of the "petals" of the dissipation curve, or rather their symmetry, is a reflection of specific and measurable regularities.
These regularities include the appearance of new peaks in the absorption spectrum of electromagnetic radiation with different polarization, as well as qualitative differences in the dynamics of the wave packet that are manifested when hexagonal distortion or corrugation of the spectrum is taken into account.
"With the results obtained, we will be able to estimate in our future optical and transport experiments the real contribution of this corrugation, that is, to describe more accurately the details of the "petal" shape of the dissipation law," Denis Khomitsky notes.
Suggested Items
IDTechEx Examines the Opportunities for Wearables in Digital Health
04/19/2024 | IDTechExIDTechEx’s report, “Digital Health and Artificial Intelligence 2024-2034: Trends, Opportunities, and Outlook”, covers this ongoing trend in the consumer health wearables market and includes analysis of the opportunities and roadmap for biometric monitoring.
NCAB Appoints Tim Benjamin as New CFO
04/15/2024 | NCAB GroupNCAB Group has appointed Tim Benjamin as its new CFO. Tim has a long and broad experience of managerial business finance roles, including M&A and IT.
Plastronics and the New IPC Guidelines for In-mold Electronics (IME)
04/11/2024 | Barry Matties, I-Connect007In the ever-evolving world of electronics, the roads for the integration of electronics assemblies into 3D structures continue to grow into a set of technologies used to produce 3D plastronics parts and revolutionize mainly the automotive industry. IPC has been developing standards for this set of technologies, led by Francisco Fourcade, IPC electronics technology standards manager.
IEC USA Congratulates Bernie Consitt for 25 Years of Service
04/09/2024 | IECJoin us in celebrating Bernie Consitt's 25 years of service and camaraderie at IEC (International Electronic Components). Bernie has been instrumental in his role as Accounting Manager, helping to supervise, track, and evaluate day-to-day activities within the accounting team.
Helena Maripuu Joins Incap as Group Communication and IR Lead
04/08/2024 | IncapFrom 1 April, communications expert Helena Maripuu joined the headquarters and team of Incap, an international electronics manufacturing services company, to share her long-term experience in the communications and marketing industry and to take the lead in managing processes for Group communication and Investor Relations.