Scaling of geometric phase versus band structure in cluster-Ising models

• Main Authors: Nie, Wei, Mei, Feng, Amico, Luigi, Kwek, Leong Chuan
• Other Authors: MajuLab, CNRS-UNS-NUS-NTU International Joint Research Unit
• Format: Article
• Language: English
• Published: 2018
• Subjects: Cluster Interactions; Dynamical Critical Exponent
• Online Access: https://hdl.handle.net/10356/83134; http://hdl.handle.net/10220/45073
• Institution: Nanyang Technological University

We study the phase diagram of a class of models in which a generalized cluster interaction can be quenched by an Ising exchange interaction and external magnetic field. The various phases are studied through winding numbers. They may be ordinary phases with local order parameters or exotic ones, known as symmetry protected topologically ordered phases. Quantum phase transitions with dynamical critical exponents z = 1 or z = 2 are found. In particular, the criticality is analyzed through finite-size scaling of the geometric phase accumulated when the spins of the lattice perform an adiabatic precession. With this study, we quantify the scaling behavior of the geometric phase in relation to the topology and low-energy properties of the band structure of the system.