Emergent fractons in Elusive Bose Metal - When IR theory blend with UV physics

Datum

30.10.2020

Zeit

11:00 - 12:00

Sprecher

Dr. Yizhi You

Zugehörigkeit

Princeton University, Dept. of Physics

Sprache

en

Hauptthema

Materialien

Host

Grit Rötzer

Beschreibung

Paramagnetic spin systems with spontaneously broken spatial symmetries, such as valence bond solid (VBS) phases, can host topological defects carrying non-trivial quantum numbers, which enables the paradigm of deconfined quantum criticality. In this talk, I will show that the defects of the valence plaquette solid(VPS) order parameter, in addition to possessing non-trivial quantum numbers, have fracton mobility constraints in the VPS phase. The spinon inside a single vortex cannot move freely in any direction, while a dipolar pair of vortices with spinon pairs can only move perpendicular to its dipole moment. These mobility constraints, while they persist near QCP, can potentially inhibit the condensation of spinons and preclude a continuous transition from the VPS to the Néel antiferromagnet. Instead, the VPS melting transition can be driven by the proliferation of spinon dipoles. In particular, we argue that a 2d VPS can melt into a stable gapless phase in the form of an algebraic bond liquid with algebraic correlations and long-range entanglement. Such a bond liquid phase yields a concrete example of the elusive 2d Bose metal with symmetry fractionalization. .

Links

• Seminars at the IFW

Letztmalig verändert: 28.10.2020, 00:08:02