One-Dimensional Tasaki-Hubbard Model in Paramagnetic Limit
V. Baliha a, J. Richter b and O. Derzhkoa,c,b,d
aInstitute for Condensed Matter Physics, National Academy of Sciences of Ukraine, Svientsitskii Str. 1, 79011 L'viv, Ukraine
bInstitut für Theoretische Physik, Otto-von-Guericke-Universität Magdeburg, P.O. Box 4120, 39016 Magdeburg, Germany
cDepartment for Theoretical Physics, Ivan Franko National University of L'viv, Drahomanov Str. 12, 79005 L'viv, Ukraine
dAbdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy
Received: May 5, 2016
Full Text PDF
The one-dimensional Tasaki-Hubbard model belongs to the class of flat-band ferromagnets. By introducing an infinitesimally small external magnetic field, we examine the properties of the model in the paramagnetic regime. We compare and contrast them to the properties of the conventional Curie paramagnet.

DOI: 10.12693/APhysPolA.132.1256
topics: flat-band Hubbard model, paramagnetism