Aviso: para depositar documentos, por favor, inicia sesión e identifícate con tu cuenta de correo institucional de la UCM con el botón MI CUENTA UCM. No emplees la opción AUTENTICACIÓN CON CONTRASEÑA
 

Interplay between double-exchange, superexchange, and Lifshitz localization in doped manganites

Simple item page
dc.contributor.authorAlonso, J. L.
dc.contributor.authorFernández Pérez, Luis Antonio
dc.contributor.authorGuinea, F.
dc.contributor.authorLaliena, V.
dc.contributor.authorMartín Mayor, Víctor
dc.date.accessioned2023-06-20T20:16:56Z
dc.date.available2023-06-20T20:16:56Z
dc.date.issued2002-09-01
dc.description© 2002 American Physical Society. We thank P. A. Algarabel, J. Blasco, J. García, R. Ibarra, J. M. de Teresa, and especially Domingo González, for discussions. The authors acknowledge financial support from CICyT (Spain) through Grant Nos. PB96-0875, AEN99- 0990, FPA2000-0956, and FPA2000-1252. V.M.-M. was supported by E.C. Contract No. HPMF-CT-2000-00450.
dc.description.abstractConsidering the disorder caused in manganites by the substitution Mn→Fe or Ga, we accomplish a systematic study of doped manganites begun in previous papers. To this end, a disordered model is formulated and solved using the variational mean-field technique. The subtle interplay between double exchange, superexchange, and disorder causes similar effects on the dependence of T_(C) on the percentage of Mn substitution in the cases considered. Yet, in La_(2/3)Ca_(1/3)Mn_(1-y)Ga_(y)O_(3) our results suggest a quantum critical point (QCP) for y ≈ 0.1–0.2, associated to the localization of the electronic states of the conduction band. In the case of La_(x)Ca_(x)Mn_(1-y)Fe_(y)O_(3) (with x = 1/3,3/8) no such QCP is expected.
dc.description.departmentDepto. de Física Teórica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipCICyT (Spain)
dc.description.sponsorshipE.C.
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/38667
dc.identifier.doi10.1103/PhysRevB.66.104430
dc.identifier.issn1098-0121
dc.identifier.officialurlhttp://doi.org/10.1103/PhysRevB.66.104430
dc.identifier.relatedurlhttp://journals.aps.org/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/60012
dc.issue.number10
dc.journal.titlePhysical review B
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.projectIDPB96-0875
dc.relation.projectIDAEN99- 0990
dc.relation.projectIDFPA2000-0956
dc.relation.projectIDFPA2000-1252
dc.relation.projectIDHPMF-CT-2000-00450
dc.rights.accessRightsopen access
dc.subject.cdu53
dc.subject.cdu51-73
dc.subject.keywordColossal magnetoresistance
dc.subject.keywordPhase-diagram
dc.subject.keywordSystems
dc.subject.keywordModel
dc.subject.keywordPerovskites
dc.subject.keywordTransition
dc.subject.keywordBehavior
dc.subject.keywordPhysics
dc.subject.keywordFe.
dc.subject.ucmFísica (Física)
dc.subject.ucmFísica-Modelos matemáticos
dc.subject.unesco22 Física
dc.titleInterplay between double-exchange, superexchange, and Lifshitz localization in doped manganites
dc.typejournal article
dc.volume.number66
dcterms.references1) S. Sachdev, Quantum Phase Transitions (Cambridge University Press, Cambridge, England, 1999) -- ibid, Science, 288, 475 (2000) -- ibid, Physica A, 313, 252 (2002). 2) J. Hertz, Phys. Rev. B, 14, 1165 (1976) -- T. Moriya, Spin Fluctuations in Itinerant Electron Magnetism (Springer, Berlin, 1985) -- A. J. Millis, Phys. Rev. B, 48, 7183 (1993). 3) D. Belitz, T. R. Kirkpatrick, cond-mat/0106279 (unpublished), and references therein. 4) K. Wilson, J. Kogut, Phys. Rep., 12, 75 (1974). 5) S. Caprara, C. Castellani, C. Di Castro, M. Grilli, A. Perali, Physica B, 280, 196 (2000) -- C. Di Castro, L. Benfatto, S. Caprara, C. Castellani, M. Grilli, Physica C, 341-348, 1715 (2000). 6) E. Dagotto, T. M. Rice, Science, 271, 618 (1996). 7) A. J. Millis, A. J. Schofield, G. G. Lonzarich, S. A. Grigera, Phys. Rev. Lett., 88, 217204 (2002). 8) F. Iglói, R. Juhász, P. Lajko, et al., Phys. Rev. Lett., 86, 1343 (2001) -- E. Carlon, P. Lajko, F. Iglói, ibid., 87, 277201 (2001). 9) P. A. Lee, T. V. Ramakrishna, Rev. Mod. Phys., 57, 287 (1985). 10) V. N. Smolyaninova, X. C. Xie, F. C. Zhang, M. Rajeswari, R. L. Greene, S. Das Sarma, Phys. Rev. B, 62, 3010 (2000). 11) J. M. D. Coey, M. Viret, S. von Molnar, Adv. Phys., 48, 167 (1999). 12) Y. Sun, X. Xu, L. Zheng, Y. Zhang, Phys. Rev. B, 60, 12 317 (1999). 13) J. Blasco, J. García, J. M. de Teresa, M. R. Ibarra, J. Pérez, P. A. Algarabel, C. Marquina, Phys. Rev. B, 55, 8905 (1997). 14) K. H. Ahn, X. S. Wu, C. L. Chien, Phys. Rev. B, 54, 15 299 (1996). 15) J. R. Sun, G. H. Rao, B. G. Shen, H. K. Wong, Appl. Phys. Lett., 73, 2998 (1998). 16) M. M. Xavier, Jr., F. A. O. Cabral, J. H. de Araújo, C. Chesman, T. Dumelow, Phys. Rev. B, 63, 012408 (2000). 17) J. Mira, J. Rivas, F. Rivadulla, C. Vázquez-Vázquez, M. A. López-Quintela, Phys. Rev. B, 60, 2998 (1999). 18) P. A. Algarabel, J. M. de Teresa, J. Blasco, M. R. Ibarra, talk at the Thematic Network Meeting on Colossal Magnetoresistance, Calella, Spain, February 2002 (unpublished). 19) J. Burgy, M. Mayr, V. Martín-Mayor, A. Moreo, E. Dagotto, Phys. Rev. Lett., 87, 277202 (2001). 20) J. A. Verges, V. Martín-Mayor, L. Brey, Phys. Rev. Lett., 88, 136401 (2002). 21) J. L. Alonso, L. A. Fernández, F. Guinea, V. Laliena, V. Martín-Mayor, Phys. Rev. B, 63, 064416 (2001). 22) J. L. Alonso, L. A. Fernández, F. Guinea, V. Laliena, V. Martín-Mayor, Phys. Rev. B, 63, 054411 (2001). 23) J. L. Alonso, L. A. Fernández, F. Guinea, V. Laliena, V. Martín-Mayor, Nucl. Phys. B, 596, 587 (2001). 24) J. L. Alonso, J. A. Capitán, L. A. Fernández, F. Guinea, V. Martín-Mayor, Phys. Rev. B, 64, 054408 (2001). 25) C. Zener, Phys. Rev., 82, 403 (1951) -- P. W. Anderson, H. Hasegawa, ibid., 100, 675 (1955) -- P. G. de Gennes, ibid., 118, 141 (1960). 26) D. P. Arovas, F. Guinea, Phys. Rev. B, 58, 9150 (1998) -- M. Yu. Kagan, D. I. Khomskii, M. V. Mostovoy, Eur. Phys. J. B, 12, 217 (1999). 27) Phonons are crucial to understand magnetoresistance effects, see Ref. 20 and references therein. 28) A. Tzavellas, K. N. Trohidou, D. Kechrakos, N. Moutis, Appl. Phys. Lett., 77, 3627 (2000). 29) See, e.g., G. Parisi, Field-Theory, Disorder and Simulations, Lecture Notes in Physics Vol. 49 (World Scientific, Singapore, 1992). 30) A. Kaneko, T. Ohtsuki, Ann. Phys. (Leipzig), 8, 121 (1999). 31) We obtain the DOS numerically, see Ref. 33 and C. Benoit, E. Royer, G. Poussigue, J. Phys.: Condens. Matter, 4, 3125 (1992) -- P. Turchi, F. Ducastelle, G. Tréglia, J. Phys. C, 15, 2891 (1982). 32) V. Martín-Mayor, G. Parisi, P. Verrocchio, Phys. Rev. E, 62, 2373 (2000).
dspace.entity.typePublication
relation.isAuthorOfPublication146096b1-5825-4230-8ad9-b2dad468673b
relation.isAuthorOfPublication061118c0-eadf-4ee3-8897-2c9b65a6df66
relation.isAuthorOfPublication.latestForDiscovery146096b1-5825-4230-8ad9-b2dad468673b

Download

Original bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
FernándezPérezLuisAntonio35LIBRE.pdf
Size:
214.35 KB
Format:
Adobe Portable Document Format
downoload Download

Collections

Artículos