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Related Concept Videos

Electric Dipoles and Dipole Moment01:30

Electric Dipoles and Dipole Moment

7.0K
Consider two charges of equal magnitude but opposite signs. If they cannot be separated by an external electric field, the system is called a permanent dipole. For example, the water molecule is a dipole, making it a good solvent.
Theoretically, studying electric dipoles leads to understanding why the resultant electric forces around us are weak. Since electric forces are strong, remnant net charges are rare. Hence, the interaction between dipoles helps us understand electrical interactions in...
7.0K
Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

27.2K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
27.2K
Induced Electric Dipoles01:28

Induced Electric Dipoles

5.0K
A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...
5.0K
Calculations of Electric Potential II01:27

Calculations of Electric Potential II

2.5K
An electric dipole is a system of two equal but opposite charges, separated by a fixed distance. This system is used to model many real-world systems, including atomic and molecular interactions. One of these systems is the water molecule, but only under certain circumstances. These circumstances are met inside a microwave oven, where electric fields with alternating directions make the water molecules change orientation. This vibration is equivalent to heat at the molecular level.
Consider a...
2.5K
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

49.6K
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,...
49.6K
Molecular Geometry and Dipole Moments02:36

Molecular Geometry and Dipole Moments

20.1K
The VSEPR theory can be used to determine the electron pair geometries and molecular structures as follows:
20.1K

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Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
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Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid

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Quantum electric-dipole liquid on a triangular lattice.

Shi-Peng Shen1, Jia-Chuan Wu2, Jun-Da Song2

  • 1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.

Nature Communications
|February 5, 2016
PubMed
Summary
This summary is machine-generated.

Researchers discovered a novel quantum electric-dipole liquid in frustrated dielectrics, analogous to quantum spin liquids. This finding in BaFe12O19 reveals a liquid-like quantum phase with itinerant excitations, opening new physics frontiers.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Materials Science

Background:

  • Geometric frustration and quantum fluctuations can prevent long-range ordering in magnetic systems, leading to quantum spin liquid states.
  • These phenomena are not limited to magnetism and can extend to other systems with interacting dipoles.

Purpose of the Study:

  • To propose and experimentally investigate the existence of quantum electric-dipole liquids in frustrated dielectrics.
  • To explore BaFe12O19 as a candidate material exhibiting such a state.

Main Methods:

  • Experimental measurements of dielectric permittivity, heat capacity, and thermal conductivity.
  • Low-temperature measurements down to 66 mK to probe quantum phenomena.

Main Results:

  • Evidence for an unusual liquid-like quantum phase in BaFe12O19.
  • Observation of itinerant low-energy excitations with a small energy gap.

Conclusions:

  • The study confirms the emergence of quantum electric-dipole liquids in frustrated dielectrics.
  • This discovery provides a new platform for fundamental physics research in quantum materials.