Bose–Einstein condensation (BEC) is a quantum phenomenon in which a macroscopic
number of bosons occupy the lowest energy state and acquire coherence at low …

We present an introduction to the workings, units of measure, and general properties of
magnetic materials. This is intended as a “primer to interpretation of magnetic data” for those …

Using dynamical mean-field theory and exact diagonalization we study the phase diagram
of the repulsive Haldane-Hubbard model, varying the interaction strength and the sublattice …

We propose two machine-learning methods based on neural networks, which we
respectively call the phase-classification method and the temperature-identification method …

Significant advances in the experimentally measuring high-field entropy have been made
over the last three decades, which have improved our knowledge of magnetic materials …

We report magnetization (χ, M), magnetic specific heat (CM), and neutron powder diffraction
results on a quasi-two-dimensional (2D) S= 2 square lattice antiferromagnet Ba 2 FeSi 2 O 7 …

We present an experimental study of the two-dimensional S= 1 2 square-lattice
antiferromagnet Cu (pz) 2 (ClO 4) 2 (pz denotes pyrazine-C 4 H 4 N 2) using specific-heat …

Abstract Two-dimensional (2D) systems with continuous symmetry lack conventional long-
range order because of thermal fluctuations. Instead, as pointed out by Berezinskii, Kosterlitz …

The Berezinskii–Kosterlitz–Thouless (BKT) transition is a typical topological phase transition
defined between binding and unbinding states of vortices and antivortices, which is not …

The measured thermodynamic phase diagram of the quasi-two-dimensional magnet [Cu (HF
2)(pyz) 2] BF 4 (pyz= pyrazine= N 2 C 4 H 4) exhibits an unusual nonmonotonic …