Analysis of causality principle for the conductivity of grapheneMay 15, 2018
Vladimir Mostepanenko, Chief Research Associate of KFU Cosmology Lab and Pulkovo Astronomical Observatory, explains, "Despite graphene layers' extremely small width, it has proven to be a firm material which conducts electricity even under zero temperatures when density of charge carriers also equals zero. But something absolutely unexpected was that this residual conductivity can be expressed through fundamental physical constants - electron charge and Planck constant. Graphene has been used successfully in dozens of electronic devices and has been found in interstellar matter."
Graphene's unusual qualities led to speculation that the causality principle may not be observed for it. The authors, Vladimir Mostepanenko and Galina Klimchitskaya, proved that the principle is preserved for graphene. Through the direct analytic calculation it was shown that the real and imaginary parts of graphene conductivity, found recently on the basis of first principles of thermal quantum field theory using the polarization tensor in (2+1)-dimensional space-time, satisfy the Kramers-Kronig relations precisely.
The results are important for further inquiries into reflective and absorptive qualities of graphene.
Kazan Federal University
Related Graphene Articles:
University of Illinois at Chicago scientists have discovered a new chemical method that enables graphene to be incorporated into a wide range of applications while maintaining its ultra-fast electronics.
Graphene, the two-dimensional, ultra lightweight and super-strong carbon film, has been hailed as a wonder material since its discovery in 2004.
Scientists have developed a new method of characterizing graphene's properties without applying disruptive electrical contacts, allowing them to investigate both the resistance and quantum capacitance of graphene and other two-dimensional materials.
Graphene is considered as one of the most promising new materials.
Researchers have developed a technique for converting positively charged (p-type) reduced graphene oxide (rGO) into negatively charged (n-type) rGO, creating a layered material that can be used to develop rGO-based transistors for use in electronic devices.
This prestigious Conference to be held at the Barcelona International Convention Centre (March 28-31) aims to bring together academia and industry to integrate new graphene technologies into practical applications.
A breakthrough by CSIRO-led scientists has made the world's strongest material more commercially viable, thanks to the humble soybean.
By interfacing brain cells onto graphene, researchers at the University of Illinois at Chicago have shown they can differentiate a single hyperactive cancerous cell from a normal cell, pointing the way to developing a simple, noninvasive tool for early cancer diagnosis.
DGIST developed cryogenic microwave photodetector which is able to detect 100,000 times smaller light energy compared to the existing photedetectors.
IBS researchers report a fundamental study of how graphene is hydrogenated.
Related Graphene Reading:
Graphene: The Superstrong, Superthin, and Superversatile Material That Will Revolutionize the World
by Les Johnson (Author), Joseph E. Meany (Author)
Two scientists give an enthusiastic, layperson's overview of a new supermaterial now in development that could transform many features of daily life, from creating new conveniences to improving health and safety.
What if you discovered an infinitesimally thin material capable of conducting electricity, able to suspend millions of times its own weight, and yet porous enough to filter the murkiest water? And what if this incredible substance is created from the same element that fills the common pencil? That's graphene--a flat, two-dimensional, carbon-based molecule with a single... View Details
Graphene: An Introduction to the Fundamentals and Industrial Applications (Advanced Material Series)
by Madhuri Sharon (Editor), Maheshwar Sharon (Editor), Ashutosh Tiwari (Editor), Hisanori Shinohara (Editor)
Often described as a “miracle material”, graphene’s potential applications are extraordinary, ranging from nanoscale ‘green’ technologies, to sensors and future conductive coatings.
This book covers the topic of ‘graphene’ – the history, fundamental properties, methods of production and applications of this exciting new material. The style of the book is both scientific and technical – it is accessible to an audience that has a general, undergraduate-level background in the sciences or engineering, and is aimed at industries considering graphene applications.... View Details
Graphene: Fundamentals and emergent applications
by Jamie H. Warner (Author), Franziska Schaffel (Author), Mark Rummeli (Author), Alicja Bachmatiuk (Author)
Providing fundamental knowledge necessary to understand graphene’s atomic structure, band-structure, unique properties and an overview of groundbreaking current and emergent applications, this new handbook is essential reading for materials scientists, chemists and physicists.
Since the 2010 physics Nobel Prize awarded to Geim and Novosolev for their groundbreaking work isolating graphene from bulk graphite, there has been a huge surge in interest in the area. This has led to a large number of news books on graphene. However, for such a vast inflow of new entrants, the current... View Details
The Chemistry Book: From Gunpowder to Graphene, 250 Milestones in the History of Chemistry (Sterling Milestones)
by Derek B Lowe (Author)
NA View Details
Graphene: A New Paradigm in Condensed Matter and Device Physics
by E. L. Wolf (Author)
The book is an introduction to the science and possible applications of Graphene, the first one-atom-thick crystalline form of matter. Discovered in 2004 by now Nobelists Geim and Novoselov, the single layer of graphite, a hexagonal network of carbon atoms, has astonishing electrical and mechanical properties. It supports the highest electrical current density of any material, far exceeding metals copper and silver. Its absolute minimum thickness, 0.34 nanometers, provides an inherent advantage in possible forms of digital electronics past the era of Moore's Law.
The book describes the... View Details
Graphene: Fundamentals, Devices, and Applications
by Serhii Shafraniuk (Author)
Graphene is the first example of two-dimensional materials and is the most important growth area of contemporary research. It forms the basis for new nanoelectronic applications. Graphene, which comprises field-effect structures, has remarkable physical properties.
This book focuses on practical applications determined by the unique properties of graphene. Basic concepts are elucidated by end-of-chapter problems, the answers to which are provided in the accompanying solutions manual. The mechanisms of electric and thermal transport in the gated graphene, interface phenomena,... View Details
Graphene: Carbon in Two Dimensions
by Mikhail I. Katsnelson (Author)
Graphene is the thinnest known material, a sheet of carbon atoms arranged in hexagonal cells a single atom thick, and yet stronger than diamond. It has potentially significant applications in nanotechnology, 'beyond-silicon' electronics, solid-state realization of high-energy phenomena and as a prototype membrane which could revolutionise soft matter and 2D physics. In this book, leading graphene research theorist Mikhail Katsnelson presents the basic concepts of graphene physics. Topics covered include Berry phase, topologically protected zero modes, Klein tunneling, vacuum reconstruction... View Details
Graphene: Energy Storage and Conversion Applications (Electrochemical Energy Storage and Conversion)
by Zhaoping Liu (Author), Xufeng Zhou (Author)
Suitable for readers from broad backgrounds, Graphene: Energy Storage and Conversion Applications describes the fundamentals and cutting-edge applications of graphene-based materials for energy storage and conversion systems. It provides an overview of recent advancements in specific energy technologies, such as lithium ion batteries, supercapacitors, fuel cells, solar cells, lithium sulfur batteries, and lithium air batteries. It also considers the outlook of industrial applications in the near future. Offering a brief introduction to the major synthesis methods of graphene, the... View Details
Graphene: Fabrication, Characterizations, Properties and Applications
by Hongwei Zhu (Author)
Graphene: Fabrication, Characterizations, Properties and Applications presents a comprehensive review of the current status of graphene, especially focused on synthesis, fundamental properties and future applications, aiming to giving a comprehensive reference for scientists, researchers and graduate students from various sectors. Graphene, a single atomic layer of carbon hexagons, has stimulated a lot of research interest owing to its unique structure and fascinating properties.
The book is devoted to understanding graphene fundamentally yet comprehensively through a wide... View Details
Graphene Technology: From Laboratory to Fabrication
by Soroush Nazarpour (Editor), Stephen R. Waite (Editor)
Filling the gap between publications for industrial developers and academic researchers on graphene synthesis and its applications, this book presents the essential aspects for the successful upscaling of graphene production.
After an introduction to graphene, its synthesis and characterization, the text covers a wide variety of graphene composites and compounds. The larger part of the book discusses various applications where graphene has been successfully integrated into technologies, including uses in the energy sector, oil and gas industry, biomedical areas, sensors and coatings.... View Details