No Mass Gap Phase Transition in Novel Massless Dirac Fermion Material
© The Physical Society of Japan
This article is on
Quantum Phase Transition in Organic Massless Dirac Fermion System α-(BEDT-TTF)2I3 under Pressure
(JPSJ Editors' Choice)
J. Phys. Soc. Jpn.
89,
123702
(2020)
.
Using an organic massless Dirac fermion system, we found that massless Dirac fermions undergo a quantum phase transition without creating any mass gap even in the strong coupling regime.
Quantum Phase Transition in Organic Massless Dirac Fermion System α-(BEDT-TTF)2I3 under Pressure
(JPSJ Editors' Choice)
J. Phys. Soc. Jpn.
89,
123702
(2020)
.
Share this topic
Fields
Related Articles
-
Mysterious Critical Phenomena Driven by Role Reversal in Multicomponent Systems: From Normal to Reverse RKKY — Twofold Reversal and Induced Critical Exponent
Electronic transport in condensed matter
Structure and mechanical and thermal properties in condensed matter
2026-10-5
The Reverse RKKY mechanism drives a twofold reversal, yielding an anomalous specific‑heat peak with a large, induced critical exponent.
-
Direct Observation of Piezoelectricity from Electric Toroidal Quadrupole Order
Electron states in condensed matter
Structure and mechanical and thermal properties in condensed matter
2026-9-30
This study reports the direct observation of piezoelectricity in the spin-orbit-coupled metal Cd2Re2O7. The findings reveal how electric toroidal quadrupole order drives successive inversion-symmetry-breaking transitions and anisotropic electromechanical responses.
-
What Shapes Electron Distributions in Nonequilibrium Nanowires?
Electronic transport in condensed matter
2026-4-20
A theoretical framework was developed to describe nonequilibrium electron distributions across the ballistic, diffusive, and local equilibrium transport regimes in voltage-biased nanowires in a unified manner.
-
Toward Clarification of Physical Properties of Quasicrystals: Noncollinear Magnetic Orders in Icosahedral Approximants
Cross-disciplinary physics and related areas of science and technology
Electronic transport in condensed matter
Magnetic properties in condensed matter
2026-4-6
An effective model based on magnetic anisotropy arising from a crystalline electric field is constructed for icosahedral approximants, which not only explains measured ferromagnets and antiferromagnets but also reveals new types of noncollinear magnetic orders.
-
The Physics of Light-Spin Interactions: Advances in Photodriven Quantum Spin Systems
Dielectric, optical, and other properties in condensed matter
Electromagnetism, optics, acoustics, heat transfer, and classical and fluid mechanics
Electronic transport in condensed matter
Magnetic properties in condensed matter
Statistical physics and thermodynamics
2025-12-17
This Special Topics edition of the Journal of the Physical Society of Japan discusses the recent progress and future directions for the rapidly progressing field of photodriven quantum spin systems.