Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Ijanı́lio G. Araújo"'
Autor:
J.T.M. Pacobahyba, J. Ricardo de Sousa, Walter E.F. Parente, Ijanı́lio G. Araújo, Minos A. Neto
Publikováno v:
Physica E: Low-dimensional Systems and Nanostructures. 74:287-291
We will study phase diagram the quantum spin-1/2 anisotropic Heisenberg antiferromagnet model in the presence of a Dzyaloshinskii–Moriya interaction ( D ) and a uniform longitudinal ( H ) magnetic field, where we have observed an anomaly at low tem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39516af3579b28fb25bb52c446d88bd0
https://doi.org/10.1016/j.physe.2015.07.009
https://doi.org/10.1016/j.physe.2015.07.009
Autor:
J.T.M. Pacobahyba, Ijanı́lio G. Araújo, Minos A. Neto, J. Ricardo de Sousa, Walter E.F. Parente, Ümit Akıncı
Publikováno v:
Journal of Magnetism and Magnetic Materials. 355:235-239
In this paper we study the quantum spin-1/2 anisotropic Heisenberg antiferromagnet model in the presence of a Dzyaloshinskii-Moriya interaction (D) and a uniform longitudinal (H) magnetic held. Using the effective-held theory with a finite cluster N=
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a2c9c84209f23fdb1231b91f721e650
https://doi.org/10.1016/j.jmmm.2013.12.041
https://doi.org/10.1016/j.jmmm.2013.12.041
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 305:585-596
The phase diagram of the quantum spin- 1 2 anisotropic Heisenberg antiferromagnet is studied, within a mean-field renormalization-group approach in larger clusters. The model consists of an anisotropic cubic lattice, with in-plane J and inter-plane J
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ddf1426055da28a1f5e7c01162409d3
https://doi.org/10.1016/s0378-4371(01)00474-5
https://doi.org/10.1016/s0378-4371(01)00474-5
Publikováno v:
Journal of Magnetism and Magnetic Materials. 219:355-359
The three-dimensional (3d) quenched decorated Ising model with competitive interactions is treated to simulate the 3d antiferromagnetic phase stability limit of the high-temperature superconductor cuprate compounds (e.g., La–Ba–Cu–O and Y–Ba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fac9dd2dd946c5e6af814113478632bb
https://doi.org/10.1016/s0304-8853(00)00337-1
https://doi.org/10.1016/s0304-8853(00)00337-1
Publikováno v:
Physics Letters A. 272:333-340
The very recently improved treatment proposed by de Sousa and Plascak [Phys. Lett. A 237 (1997) 66], the mean field renormalization group (MFRG) approach used on the quantum spin 1/2 Heisenbeg antiferromagnet in two sublattices, is herein extended fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ea89e9344fcba39a07f16be4d4388be
https://doi.org/10.1016/s0375-9601(00)00456-4
https://doi.org/10.1016/s0375-9601(00)00456-4
Autor:
J.R. de Sousa, Ijanı́lio G. Araújo
Publikováno v:
Solid State Communications. 115:265-268
The very recently improved treatment proposed by de Sousa and Plascak [Phys. Lett. A237 (1997) 66], the mean field renormalization group (MFRG) approach used on the quantum spin 1/2 Heisenberg antiferromagnet in two sublattices, is herein extended fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::153fc6856313d2aac8f076548b6f7fbd
https://doi.org/10.1016/s0038-1098(00)00137-x
https://doi.org/10.1016/s0038-1098(00)00137-x
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 278:181-187
The criticality of the quantum anisotropic spin- 1 2 Heisenberg antiferromagnetic model is studied by the mean-field renormalization group (MFRG) approach. The critical temperature and the thermal exponent for the ferromagnetic (F) and antiferromagne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b95190e8e76eb47ace6d5a10c0e63e2
https://doi.org/10.1016/s0378-4371(99)00439-2
https://doi.org/10.1016/s0378-4371(99)00439-2
Publikováno v:
Journal of Magnetism and Magnetic Materials. 202:231-238
We study the spin- 1 2 anisotropic Heisenberg antiferromagnetic model using the effective field renormalization group (EFRG) approach. The EFRG method is illustrated by employing approximations in which clusters with one (N′=1) and two (N=2) spins
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6cc3adb55895116e6d31963e15cc2be2
https://doi.org/10.1016/s0304-8853(99)00124-9
https://doi.org/10.1016/s0304-8853(99)00124-9
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 260:150-156
The effective-field theory (EFT) of a two-spin cluster is applied to study the critical behavior of a three-dimensional classical and quantum Heisenberg antiferromagnet (AF). Neel temperature (TN) and sublattice magnetization are calculated numerical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d916f5121f96b610128311627d0ebb0e
https://doi.org/10.1016/s0378-4371(98)00278-7
https://doi.org/10.1016/s0378-4371(98)00278-7