Abstract
We study the Heisenberg model in an external magnetic field on curved surfaces with rotational symmetry. The Euler–Lagrange static equations, derived from the Hamiltonian, lead to the inhomogeneous double sine-Gordon equation. Nonetheless, if the magnetic field is coupled to the metric elements of the surface, and consequently to its curvature, the homogeneous double sine-Gordon equation emerges and a \(2\pi \)-soliton solution is obtained. In order to satisfy the self-dual equations, surface deformations are predicted to appear at the sector where the spin direction is opposite to the magnetic field. On the basis of the model, we find the characteristic length of the \(2\pi \)-soliton for three specific rotationally symmetric surfaces: the cylinder, the catenoid, and the hyperboloid. On finite surfaces, such as the sphere, torus, and barrels, fractional \(2\pi \)-solitons are predicted to appear.
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S. Tanda, T. Tsuneta, H. Okajima, K. Inagaki, K. Yumaya, N. Hatakenaka, Nature 417, 397 (2002)
E. Yazgan, E. Taşci, O.B. Malcioǧlu, Ş. Erkoç, J. Mol. Struct. 681, 231 (2004)
E. Taşci, E. Yazgan, O.B. Malcioǧlu, Ş. Erkoç, Fuller. Nanotub. Carbon Nanostruct. 13(147) (2005)
F.-M. Liu, M. Green, J. Mater. Chem. 14, 1526 (2004)
F.Q. Zhu, G.W. Chern, O. Tchernyshyov, X.C. Zhu, J.G. Zhu, C.L. Chien, Phys. Rev. Lett. 96, 027205 (2006)
P.M. Chaikin, T.C. Lubensky, Principles of Condensed Matter Physics (Cambridge University Press, Cambridge, 2006). 3rd printing
N.D. Mermin, Rev. Mod. Phys. 51, 591 (1979)
M.N.S. Qureshi, J. Shi, H.A. Shah, Bras. J. Phys. 42, 48 (2012)
V. Vitelli, A.M. Turner, Phys. Rev. Lett. 93, 215–301 (2004)
J. Dai, J.-Q. Wang, C. Sangregorio, J. Fang, E. Carpenter, J. Tang, J. Appl. Phys. 87, 7397 (2000)
G.A. Prinz, J. Magn. Magn. Mater. 200, 57 (1999)
S.H. Sun, C.B. Murray, D. Weller, L. Folks, A. Moser, Science 287, 1989 (2000)
G.A. Prinz, ibid. 282, 1660 (1998)
D.-H. Kim, E. Rozhkova, I. Ulasov, S. Bader, T. Rajh, M. Lesniak, V. Novosad, Nat. Matter (2009). doi:10.1038/NMAT2591
E.A. Rozhkova, V. Novosad, D.-H. Kim, J. Pearson, R. Divan, T. Rajh, S.D. Bader, J. Appl. Phys. 105, 07B306 (2009)
E.A. Rozhkova, I. Ulasov, B. Lai, N.M. Dimitrijevic, M.S. Lesniac, T. Rajh, Nano Lett. 9, 3337 (2009)
V.L. Carvalho-Santos, W.A. Moura-Melo, A.R. Pereira, J. Appl. Phys. 108, 094310 (2010)
F.A. Apolonio, W.A. Moura-Melo, F.P. Crisafuli, A.R. Pereira, R.L. Silva, J. Appl. Phys. 106, 084320 (2009)
A. Vansteenkiste, M. Weigand, M. Curcic, H. Stoll, G. Schütz, B. Van Waeyenberge, New J. Phys. 11, 063006 (2009)
D. Toscano, S.A. Leonel, R.A. Dias, P.Z. Coura, B.V. Costa, J. Appl. Phys. 109, 076104 (2011)
V.L. Carvalho-Santos, A.R. Moura, W.A. Moura-Melo, A.R. Pereira, Phys. Rev. B77, 134450 (2008)
J. Benoit, R. Dandoloff, Phys. Lett. A248, 439 (1998)
A. Saxena, R. Dandoloff, T. Lookman, Physica A261, 13 (1998)
R. Dandoloff, S. Villain-Guillot, A. Saxena, A.R. Bishop, Phys. Rev. Lett. 74, 813 (1995)
S. Villain-Guillot, R. Dandoloff, A. Saxena, A.R. Bishop, Phys. Rev. B52, 6712 (1995)
L.A.N. de Paula, Bras. J. Phys. 39, 711 (2009)
G.S. Milagre, W.A. Moura-Melo, Phys. Lett. A368, 155 (2007)
L.R.A. Belo, N.M. Oliveira-Neto, W.A. Moura-Melo, A.R. Pereira, E. Ercolessi, Phys. Lett. A365, 463 (2007)
W.A. Freitas, W.A. Moura-Melo, A.R. Pereira, Phys. Lett. A336, 412 (2005)
W.A. Moura-Melo, A.R. Pereira, L.A.S. Mól, A.S.T. Pires, Phys. Lett. A360, 472 (2007)
A. Saxena, R. Dandoloff, Phys. Rev. B66, 104414 (2002)
M. Lapine, I.V. Shadrivov, D.A. Powell, Y.S. Kivshar, Nat. Mater. 11, 30 (2012)
G. Napoli, L. Vergori, Phys. Rev. Lett. 108, 207803 (2012)
T. Georgiou, L. Britnell, P. Blake, R.V. Gorbachev, A. Gholinia, A.K. Geim, C. Casiraghi, K.S. Novoselov, Appl. Phys. Lett. 99, 093103 (2011)
A. Saxena, R. Dandoloff, Phys. Rev. B58, R563 (1998)
R. Dandoloff, A. Saxena, Eur. Phys. J. B29, 265 (2002)
A. Saxena, R. Dandoloff, Phys. Rev. B66, 104414 (2002)
R. Dandoloff, A. Saxena, J. Phys. A Math. Theor. 44, 045203 (2011)
V.L. Carvalho-Santos, R. Dandoloff, Phys. Lett. A376, 3551 (2012)
V.L. Carvalho-Santos, R. Dandoloff, On geometry-dependent vortex stability and topological spin excitations on curved surfaces with cylindrical symmetry. Phys. Lett. A (2013). doi:10.1016/j.physleta.2013.03.028
K.M. Leung, Phys. Rev. B26, 226 (1982)
K.M. Leung, Phys. Rev. B27, 2877 (1983)
E.B. Bogomolnyi, Sov. J. Nucl. Phys. 26, 449 (1976)
E.W. Weisstein, Hyperboloid. (MathWorld—A Wolfram Web Resource, 2013). http://mathworld.wolfram.com/Hyperboloid.html. Accessed 30 Nov 2012
K. Kowalski, J. Rembieliński, A. Szcześniak, J. Phys. A: Math. Theor. 44, 085302 (2011)
Acknowledgments
We thank the CNPq (grant number 562867/2010-4) and Propes of the IF Baiano, for financial support. Carvalho-Santos thanks J. D. Lima, P. G. Lima-Santos, and G. H. Lima-Santos for their encouragement.
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Carvalho-Santos, V.L., Dandoloff, R. Topological Spin Excitations Induced by an External Magnetic Field Coupled to a Surface with Rotational Symmetry. Braz J Phys 43, 130–136 (2013). https://doi.org/10.1007/s13538-013-0126-1
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DOI: https://doi.org/10.1007/s13538-013-0126-1