Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Valence Bond Theory02:42

Valence Bond Theory

11.5K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.5K
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

1.9K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.9K
Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

1.6K
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
1.6K
Ferromagnetism01:31

Ferromagnetism

3.3K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
3.3K
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

1.6K
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
1.6K
Colors and Magnetism03:02

Colors and Magnetism

14.4K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
14.4K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Deconfined pseudocriticality in a model spin-1 quantum antiferromagnet.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same author

Entanglement Entropy and Deconfined Criticality: Emergent SO(5) Symmetry and Proper Lattice Bipartition.

Physical review letters·2024
Same author

Tomonaga-Luttinger liquid and quantum criticality in spin- <math> </math> antiferromagnetic Heisenberg chain <i>C</i> <sub>14</sub> <i>H</i> <sub>18</sub> <i>CuN</i> <sub>4</sub> <i>O</i> <sub>10</sub> via Wilson ratio.

PNAS nexus·2024
Same author

Universal Features of Entanglement Entropy in the Honeycomb Hubbard Model.

Physical review letters·2024
Same author

Punctured-Chern Topological Invariants for Semimetallic Band Structures.

Physical review letters·2023
Same author

Role of Majorana fermions in high-harmonic generation from Kitaev chain.

Scientific reports·2022

Related Experiment Video

Updated: Mar 8, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.7K

Pseudocriticality in Antiferromagnetic Spin Chains.

Sankalp Kumar1, Sumiran Pujari1,2, Jonathan D'Emidio3

  • 1Indian Institute of Technology Bombay, Department of Physics, Mumbai, MH 400076, India.

Physical Review Letters
|March 6, 2026
PubMed
Summary
This summary is machine-generated.

This study explores deconfined criticality using an SU(N) model, revealing its proximity to complex conformal field theories (CFTs). Advanced simulations confirm predictions, even when CFTs enter the complex plane.

More Related Videos

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

3.4K
Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
12:20

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

Published on: October 5, 2013

15.1K

Related Experiment Videos

Last Updated: Mar 8, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.7K
Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

3.4K
Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
12:20

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

Published on: October 5, 2013

15.1K

Area of Science:

  • Condensed Matter Physics
  • Quantum Field Theory

Background:

  • Weak first-order pseudocriticality and approximate scale invariance are observed in various systems.
  • Deconfined criticality in 2+1 dimensions is interpreted as slow flows near a complex conformal field theory (CFT).

Purpose of the Study:

  • To investigate an SU(N) generalization of the Heisenberg antiferromagnet in 1+1 dimensions.
  • To explore its proximity to a complex CFT as a function of N.
  • To analyze the central charge and its relation to CFT predictions.

Main Methods:

  • State-of-the-art quantum Monte Carlo simulations for continuous N.
  • Improved loop estimator for Rényi entanglement entropy using a nonequilibrium work protocol.

Main Results:

  • The SU(N) model in 1+1 dimensions is found to be near a complex CFT, tunable with N.
  • Excellent agreement between simulation results and CFT predictions for the central charge was observed.
  • The real part of the complex central charge was recovered with high accuracy for N>2, where the CFT is complex.

Conclusions:

  • The dimerized phase of the spin-1 chain (equivalent to N=3) is pseudocritical and proximate to a complex CFT.
  • This work provides new insights into the behavior of deconfined criticality and complex CFTs.