Related Experiment Video
Updated: Mar 6, 2026
10:35
Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
Published on: May 29, 2018
9.3K
Multiband One-Dimensional Electronic Structure and Spectroscopic Signature of Tomonaga-Luttinger Liquid Behavior in
M D Watson1, Y Feng2, C W Nicholson3
1Diamond Light Source, Harwell Campus, Didcot, OX11 0DE, United Kingdom.
Physical Review Letters
|March 18, 2017
Summary
Angle-resolved photoemission spectroscopy reveals Tomonaga-Luttinger liquid physics in the quasi-one-dimensional superconductor K_{2}Cr_{3}As_{3}. This finding offers new insights into the unconventional superconductivity of this material family.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- Quasi-one-dimensional materials exhibit unique electronic properties.
- Understanding unconventional superconductivity is a key challenge in condensed matter physics.
- K_{2}Cr_{3}As_{3} is a recently discovered quasi-one-dimensional superconductor.
Purpose of the Study:
- To investigate the electronic structure of the quasi-one-dimensional superconductor K_{2}Cr_{3}As_{3}.
- To identify signatures of low-energy electronic physics in this material.
- To explore the relationship between electronic properties and unconventional superconductivity.
Main Methods:
- Angle-resolved photoemission spectroscopy (ARPES).
- Analysis of Fermi surface topology and band dispersions.
- Characterization of spectral intensity behavior near the Fermi level.
Main Results:
- The Fermi surface of K_{2}Cr_{3}As_{3} consists of two sheets.
- Linearly dispersing bands show no significant renormalization.
- A linear power-law suppression of spectral intensity near the Fermi level (∼200 meV) was observed.
Conclusions:
- The observed spectral features are consistent with Tomonaga-Luttinger liquid (TLL) physics.
- TLL physics provides a new framework for understanding the unconventional superconductivity in K_{2}Cr_{3}As_{3}.
- This study opens new avenues for exploring TLL effects in other quasi-one-dimensional systems.
Related Concept Videos
02:58Crystal Field Theory - Octahedral Complexes
31.4K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
31.4K
01:01Energy Bands in Solids
2.2K
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...
2.2K
01:16UV–Vis Spectroscopy: Molecular Electronic Transitions
3.3K
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
3.3K
03:26Electron Configuration of Multielectron Atoms
65.8K
The alkali metal sodium (atomic number 11) has one more electron than the neon atom. This electron must go into the lowest-energy subshell available, the 3s orbital, giving a 1s22s22p63s1 configuration. The electrons occupying the outermost shell orbital(s) (highest value of n) are called valence electrons, and those occupying the inner shell orbitals are called core electrons. Since the core electron shells correspond to noble gas electron configurations, we can abbreviate electron...
65.8K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
49.2K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
49.2K
02:35Band Theory
17.5K
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,...
17.5K