1D Valence Bond Solids in a Magnetic Field

Speaker: Adam Iaizzi

When: May 7, 2014 (Wed), 02:00PM to 03:00PM (add to my calendar)
Location: SCI 328

This event is part of the Preliminary Oral Exam.

Examining Committee: Anders Sandvik, Claudio Chamon, James Miller, Shyamsunder Erramilli

Abstract:

Valence bond solids (VBS) are a kind of long-range nonmagnetic order that can appear in certain quantum spin systems. This order breaks a discrete symmetry, so it is allowed to occur in one dimension. Recent innovations in models and simulation techniques have enabled large-scale numerical studies of the quantum phase transition from a power-law quasi-Neel-ordered state to the VBS-ordered state. These studies have found evidence for the fractionalization of triplons into deconfined or nearly-deconfined spinons at the phase boundary. We propose studying the destruction of the VBS order by a magnetic field. I am currently developing stochastic series expansion quantum monte carlo simulations for this study. As a parallel project, we will be investigating the VBS under hole doping

Adam Iaizzi