Spin Research Group

Full List of Publications

Journal Articles

2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000(and before)

J. Abouie, A. Langari and M. Siahatgar, J. Phys. :Condens. Matter 22, 216008 (2010).
"Thermodynamic behavior of the XXZ Heisenberg s=1/2 chain around the factorizing magnetic field"

M. Rezai, A. Langari and J. Abouie, Phys. Rev. B. 81, 060401 (R) (2010).
"Factorized ground state for a general class of ferrimagnets"

M. Kargarian, R. Jafari, A. Langari, Phys. Rev. A 79, 042319 (2009)
"Dzyaloshinskii-Moriya Interaction and Anisotropy effects on the Entanglement of Heisenberg Model"

H. Rezania, A. Langari and P. Thalmeier, Phys. Rev. B 79, 094401 (2009)
"Green's function approach to the thermodynamic properties of the anisotropic Kondo necklace model"

A. Langari, Iranian Journal of Physics Research Vol. 8, No.2, pp 121 (2008)
"Introduction to quantum spin systems"

R. Jafari, M. Kargarian, A. Langari, and M. Siahatgar , Phys. Rev. B 78, 214414 (2008)
Phase diagram and entanglement of the Ising model with Dzyaloshinskii-Moriya interaction

H. Rezania, A. Langari and P. Thalmeier, Phys.Rev. B 77, 094438 (2008)
“Green's function approach to quantum criticality in the anisotropic Kondo-necklace model “

M. Kargarian ,R. Jafari and A. Langari, Phys. Rev. A77 ,032346 (2008)
“Renormalization of entanglement in the anisotropic Heisenberg (XXZ) model”

M. Siahatgar and A. Langari, Phys. Rev. B. 77. 054435 (2008)
"Thermodynamic Properties of XXZ model in a Transverse Field”

S. Mahmoudian and A. Langari, Phys. Rev. B. 77, 24420 (2008)
"Phase diagram of the one-dimensional anisotropic Kondo-necklace model”

M. Kargarian ,R. Jafari and A. Langari, Phys. Rev. A. 76, 90304 (R) (2007)
"Renormalization of concurrence: The application of the quantum renormalization group to quantum-information systems”

A. Akbari, D. Bodea and A. Langari, J. Phys.: Condens. Matter 19, 466105 (2007)
"Dielectric Susceptibility and Heat Capacity of Ultra-Cold Glasses in Magnetic Field"

P.Thalmeier and A. Langari, Phys. Rev. B 75, 174426 (2007)
"Field-induced quantum phase transition in the anisotropic Kondo necklace model”

R. Jafari and A. Langari, Phys. Rev. B 76, 014412 (2007),
"Phase diagram of the one-dimensional S=1/2 XXZ model with ferromagnetic nearest-neighbor and antiferromagnetic next-nearest-neighbor interactions"

G. I. Japaridze, A. Langari and S. Mahdavifar, J. Phys.: Condens. Matter 19, 76201 (2007)
"Spin ladder with anisotropic ferromagnetic legs in a transverse magnetic field"

A. Langari and P. Thalmeier, Phys. Rev. B.74, 24431 (2006)
"Anti-ferromagnetic and spin-gap phases of the anisotropic Kondo necklace model"

A.Fledderjohann, A.Langari and K.H.Muetter,J.Phys.: Condens. Matter 18, 4935-494(2006)
“Formation of clusters in the 2D t–J model: the mechanism for phase separation”.

J. Abouie, A. Ghasemi and A. Langari, Phys. Rev. B73, 14411 (2006)
"Thermodynamic properties of the Ferrimagnetic spin chains in the presence of magnetic field"

R. Jafari and A. Langari, Physica A 364, 213-222 (2006)
"Second order quantum renormalization group of XXZ chain with next-nearest neighbor interactions"

A. Langari and S. Mahdavifar, Phys. Rev. B73, 54410 (2006)
"The gap exponent of XXZ model in a transverse field"

A. Akbari and A. Langari, Phys. Rev. B 72, 24203 (2005)
"The effect of Aharanov - Bohm phase on the magnetic-field dependence of two-pulse echoes in glasses at low temperatures"

A. Fledderjohann, A. Langari, E.M. Hartmann, K.H.Muetter,Euro. Phys. J. B 43, 471 (2005)
"Ferromagnetism in a hard-core boson model"

A. Fledderjohann, A. Langari and K.H. Muetter,J. Phys. Condens. Matter 17, S1299 (2005)
"Cluster approach to the charge density plateau in t-J ladders"

J. Abouie and A. Langari, J. Phys.: Condens. Matter 17, S1293 (2005)
"Thermodynamic properties of Ferrimagnetic large spin systems"

A. Fledderjohann, A. Langari, K.-H. Muetter, J. Phys.: Condens. Matter 16, 8571 (2004)
"Formation of clusters in the ground state of the t-J model on a two leg ladder"
cond-mat/0410709

J. Abouie and A. Langari, Phys. Rev. B70, 184416 (2004)
"Cumulant expansion for Ferrimagnetic spin (S=1, S=2) systems", cond-mat/0409293.

A. Langari, Phys. Rev. B69, 100402(R) (2004),
"Quantum renormalization group of XYZ model in a transverse magnetic field",cond-mat/0405444.

A. Fledderjohann, A. Langari, K.-H. Muetter, Euro. Phys. J. B 36, 193 (2003)
"Charge density plateau and insulating phases in t-J model with ladder geometry"

D. V. Dmitriev, V. Ya. Krivnov, A. A. Ovchinnikov and A. Langari, JETP, Vol. 95,538 (2002)
"One-dimensional anisotropic Heisenberg model in the transverse magnetic field"

A. Langari, Phys. Rev. B65, 104201 (2002)
"Coherent motion in the interaction model of cold glasses"

A. Langari, M. A. Martin-Delgado and P. Thalmeier, Phys. Rev. B63, 144420 (2001)
"Exact diagonalization study of charge order in the quarter-filled two-leg ladder system NaV_20_5"

M. Abolfath and A. Langari, Phys. Rev. B63, 144414 (2001)
"Super fluid-spiral state of quantum ferrimagnetisms in magnetic field "

A. Langari and M. A. Martin-Delgado, Phys. Rev. B63, 54432 (2001)
"Low energy properties of Ferrimagnetic two-leg ladders : a Lanczos study "

A. Langari and M. A. Martin-Delgado, Phys. Rev. B62, 11725 (2000)
"Alternating-spin ladders in a magnetic field: Formation of magnetization plateau "

A. Langari, M. Abolfath and M. A. Martin-Delgado, Phys. Rev. B61, 343 (2000),
"Phase diagram of Ferrimagnetic ladders with bond-alternation"

A. Langari, Phys. Rev. B58, 14467 (1998),
"Phase diagram of the anti-ferromagnetic XXZ model in the presence of an external magnetic field"

A. Langari, Phys. Lett. A246, 359 (1998),
"Quantum renormalization group for XXZ model in the presence of an external magnetic field".

A. Langari and V. Karimipor, Int. J. Mod. Phys. B12, 2359 (1998),
"A modified quantum renormalization group for XXZ spin chain"

A. Langari and V. Karimipour, Phys. Lett. A236, 106 (1997),
"Quantum renormalization Group for one-dimensional fermion systems : a modified scheme"

Proceedings of International Conferences

A. Langari, page 46, Mathematically Physics (World Scientific 2005)
Proceedings of the XI regional conference (Tehran, Iran 3-6 May 2004),
"Charge and magnetization plateau in strongly correlated systems".

Preprints

M. olfath, H. Hamidian and A. Langari, cond-mat/9901063,
"Quantum ferrimagnets".

A. Akbari and A. Langari,
"The effect of magnetic-field on the characteristic energy of a defect in disordered metals".