Spin, charge, and orbital correlations in the one-dimensional t_2g-orbital Hubbard model

Abstract

References (31)

Citing Articles

Download: PDF (733 kB) or Buy this Article (US$25) (Use Article Pack)

J. C. Xavier,^1,2 H. Onishi,³ T. Hotta,³ and E. Dagotto¹
¹Condensed Matter Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA and Department of Physics, The University of Tennessee, Knoxville, Tennessee 37996, USA
²Universidade Estadual Paulista, CP 713, 17015-970 Bauru, SP, Brazil
³Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan

Received 4 July 2005; revised 14 October 2005; published 10 January 2006

Wepresent the zero-temperature phase diagram of the one-dimensional t_2g-orbital Hubbardmodel, obtained using the density-matrix renormalization group and Lanczos techniques.Emphasis is given to the case of the electron densityn=5 corresponding to five electrons per site, while several othercases for electron densities between n=3 and 6 are alsostudied. At n=5, our results indicate a first-order transition betweena paramagnetic (PM) insulator phase, with power-law slowly decaying correlations,and a fully polarized ferromagnetic (FM) state by tuning theHund's coupling. The results also suggest a transition from then=5 PM insulator phase to a metallic regime by changingthe electron density, either via hole or electron doping. Thebehavior of the spin, charge, and orbital correlation functions inthe FM and PM states are also described in thetext and discussed. The robustness of these two states againstvarying parameters suggests that they may be of relevance inquasi-one-dimensional Co-oxide materials, or even in higher dimensional cobaltite systemsas well.

URL:	http://link.aps.org/doi/10.1103/PhysRevB.73.014405
DOI:	10.1103/PhysRevB.73.014405
PACS:	75.30.Kz; 71.10.Fd; 75.50.Cc; 75.10.-b 75.30.Kz Magnetic phase boundaries including magnetic transitions, metamagnetism, etc 71.10.Fd Lattice fermion models (condensed matter) including Hubbard model, etc 75.50.Cc Ferromagnetism of nonferrous metals and alloys 75.10.-b General theory and models of magnetic ordering YEAR: 2006
KEYWORDS:	Hubbard model, ferromagnetic-paramagnetic transitions, renormalisation

REFERENCES (31)

View in Separate Window/Tab

For access to fully linked references, you need to log in. For access to fully linked references, you need to Log in.

T. Motohashi, R. Ueda, E. Naujalis, T. Tojo, I. Terasaki, T. Atake, M. Karppinen, and H. Yamauchi, Phys. Rev. B 67, 064406 (2003).
J. Sugiyama, H. Itahara, T. Tani, J. H. Brewer, and E. J. Ansaldo, Phys. Rev. B 66, 134413 (2002);

ibid. 69, 214423 (2004)

J. Sugiyama, H. Nozaki, J. H. Brewer, E. J. Ansaldo, T. Takami, H. Ikuta, and U. Mizutani, Phys. Rev. B 72, 064418 (2005).
V. Pardo, P. Blaha, M. Iglesias, K. Schwarz, D. Baldomir, and J. E. Arias, Phys. Rev. B 70, 144422 (2004).
D. J. Singh, Phys. Rev. B 68, 020503(R) (2003).
N. Bulut, W. Koshibae, and S. Maekawa, Phys. Rev. Lett. 95, 037001 (2005), and references therein.
G. Baskaran, Phys. Rev. Lett. 91, 097003 (2003);

Phys. Rev. B 68, 104508 (2003)

S. R. White, Phys. Rev. Lett. 69, 2863 (1992).
E. Dagotto, Rev. Mod. Phys. 66, 763 (1994).
H. Onishi and T. Hotta, Phys. Rev. B 70, 100402(R) (2003).
Y. Q. Li, M. Ma, D. N. Shi, and F. C. Zhang, Phys. Rev. Lett. 81, 3527 (1998).
B. Frischmuth, F. Mila, and M. Troyer, Phys. Rev. Lett. 82, 835 (1999).
Y. Yamashita, N. Shibata, and K. Ueda, Phys. Rev. B 61, 4012 (2000).
C. Itoi, S. Qin, and I. Affleck, Phys. Rev. B 61, 6747 (2000).
D. P. Arovas and A. Auerbach, Phys. Rev. B 52, 10114 (1995).
Y. Yamashita, N. Shibata, and K. Ueda, Phys. Rev. B 58, 9114 (1998).
H. C. Lee, P. Azaria, and E. Boulat, Phys. Rev. B 69, 155109 (2005).
Phys. Rev. Lett. 50, 1153 (1983).
M. Ogata and H. Shiba, Phys. Rev. B 41, 2326 (1990).
S. Daul and R. M. Noack, Phys. Rev. B 58, 2635 (1998).
H. Onishi and T. Hotta, Phys. Rev. B 71, 180410(R) (2005).

CITING ARTICLES

For access to citing articles, you need to log in.

For access to citing articles, you need to Log in.

APS » Phys. Rev. B » Volume 73 » Issue 1

< Previous Article Next Article >

A new free weekly publication from APS

Please visit physics.aps.org

Article Tools

View Cart	Download Citation
MyScitation	Print View

Article Lookup:

Phys. Rev. B 73, 014405 (2006) [9 pages]

Spin, charge, and orbital correlations in the one-dimensional t2g-orbital Hubbard model

REFERENCES (31)

CITING ARTICLES

A new free weekly publication from APS

Spin, charge, and orbital correlations in the one-dimensional t_2g-orbital Hubbard model