Multicritical point of the threedimensional Z_{2} gauge Higgs model
Abstract
We investigate the multicritical behavior of the threedimensional Z_{2} gauge Higgs model at the multicritical point (MCP) of its phase diagram, where one firstorder transition line and two continuous Isinglike transition lines meet. The duality properties of the model determine some features of the multicritical behavior at the MCP located along the selfdual line. Moreover, we argue that the system develops a multicritical X Y behavior at the MCP, which is controlled by the stable X Y fixed point of the threedimensional multicritical LandauGinzburgWilson field theory with two competing scalar fields associated with the continuous Z_{2} transition lines meeting at the MCP. This implies an effective enlargement of the symmetry of the multicritical modes at the MCP to the continuous group O(2). We also provide numerical results to support the multicritical X Y scenario.
 Publication:

Physical Review B
 Pub Date:
 April 2022
 DOI:
 10.1103/PhysRevB.105.165138
 arXiv:
 arXiv:2112.01824
 Bibcode:
 2022PhRvB.105p5138B
 Keywords:

 Condensed Matter  Statistical Mechanics
 EPrint:
 10 pages