Related Experiment Video
Updated: Apr 14, 2026
13:56
Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
8.5K
Tinene: a two-dimensional Dirac material with a 72 meV band gap.
Bo Cai1, Shengli Zhang, Ziyu Hu
1Institute of Optoelectronics & Nanomaterials, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China. zeng.haibo@njust.edu.cn.
Physical Chemistry Chemical Physics : PCCP
|April 24, 2015
Summary
Tinene, a novel two-dimensional material, exhibits Dirac characteristics and a 72 meV bandgap. This stable material, derived from gray tin, shows promise for advanced electronic devices.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Dirac materials are crucial for fundamental research and electronic devices due to unique band structures.
- Graphene's near-zero bandgap limits transistor performance with poor on-off ratios.
Purpose of the Study:
- To introduce tinene (monolayer gray tin) as a novel 2D material.
- To investigate tinene's electronic properties, Dirac characteristics, and bandgap.
- To assess tinene's stability and potential for electronic applications.
Main Methods:
- Density functional theory (DFT) calculations were employed.
- Structural, electronic, and phonon dispersion properties were analyzed.
- Tinene's characteristics were compared to silicene and germanene.
Main Results:
- Tinene exhibits Dirac characteristics and a significant 72 meV bandgap.
- It possesses a hexagonal honeycomb structure with a large buckling height (~0.70 Å).
- Phonon dispersion analysis confirmed tinene's strong dynamic stability.
Conclusions:
- Tinene is a stable 2D material with Dirac properties and a suitable bandgap.
- Its unique structure and electronic characteristics make it a potential candidate for "more than Moore" electronics.
- Tinene offers an alternative to graphene for high-performance transistors.
More Related Videos
Related Concept Videos
01:18Fermi Level
2.5K
The Fermi-Dirac function is represented by an S-shaped curve indicating the probability of an energy state being occupied by an electron at a given temperature. The Fermi level is the energy level at which there is a fifty percent chance of finding an electron, and it is positioned between the lower-energy valence band and the higher-energy conduction band.
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
2.5K
01:01Energy Bands in Solids
2.5K
Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
2.5K
01:12Fermi Level Dynamics
1.1K
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
1.1K
01:22Semiconductors
2.0K
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
2.0K
02:35Band Theory
18.0K
When two or more atoms come together to form a molecule, their atomic orbitals combine and molecular orbitals of distinct energies result. In a solid, there are a large number of atoms, and therefore a large number of atomic orbitals that may be combined into molecular orbitals. These groups of molecular orbitals are so closely placed together to form continuous regions of energies, known as the bands.
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
The energy difference between these bands is known as the band gap.
Conductor, Semiconductor,...
18.0K
02:32The de Broglie Wavelength
34.8K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
34.8K