caa a22 4500 445381140 CHVBK 20180317143017.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-0935-1 doi (NATIONALLICENCE)springer-10.1007/s10948-010-0935-1 One-Dimensional Quantum Compass Model in an Out-plane Magnetic Field [Elektronische Daten] [M. Motamedifar, Saeed Mahdavifar, S. Shayesteh] The one-dimensional quantum compass model (1D-QCM) in an out-plane magnetic field is investigated by numerical and analytical methods. The presence of the 1D-QCM in an area of the ground-state magnetic phase diagram where the odd couplings are antiferromagnetic and larger than the even couplings is studied. Using pseudo spin ladder operators indicates that the 1D-QCM in an out-plane magnetic field can be mapped to the one-dimensional Ising model in a transverse magnetic field (ITF). Analytical investigation of the effective ITF Hamiltonian predicts the occurrence of two quantum phase transitions with increasing magnetic field. Also, the critical fields are obtained from this method, which are completely in agreement with the results of the numerical experiment based on the Lanczos method. This numerical method accurately determined the behavior of the energy gap, magnetization and string order parameter, and therefore it is a very useful method for indicating the ground-state phases of the system. Springer Science+Business Media, LLC, 2010 1D quantum compass model nationallicence Lanczos method nationallicence Pseudo spin ladder operators nationallicence Quantum phase transition nationallicence Motamedifar M. Department of Physics, University of Guilan, P.O. Box 41335-19141, Rasht, Iran aut Mahdavifar Saeed Department of Physics, University of Guilan, P.O. Box 41335-19141, Rasht, Iran aut Shayesteh S. Department of Physics, University of Guilan, P.O. Box 41335-19141, Rasht, Iran aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 769-773 1557-1939 24:1-2<769 2011 24 10948 https://doi.org/10.1007/s10948-010-0935-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-0935-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Motamedifar M. Department of Physics, University of Guilan, P.O. Box 41335-19141, Rasht, Iran aut NATIONALLICENCE 700 1- Mahdavifar Saeed Department of Physics, University of Guilan, P.O. Box 41335-19141, Rasht, Iran aut NATIONALLICENCE 700 1- Shayesteh S. Department of Physics, University of Guilan, P.O. Box 41335-19141, Rasht, Iran aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 769-773 1557-1939 24:1-2<769 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer