Susceptibility and Triplet Excitation Spectrum for CaV4O9: Third-Order Perturbation Expansions

Journal of the Physical Society of Japan

Volumn 67, Issue 7, 1998, Pages 2205-2208

  Fukumoto, Yoshiyuki ^a   Oguchi, Akihide ^a  

^a TOKYO UNIVERSITY OF SCIENCE   (Japan)

Author keywords

CaV4O9; Heisenberg antiferromagnet; perturbation expansion; plaquette network; spin gap; triplet excitation spectrum; two dimensions; uniform susceptibility

Indexed keywords

EID: 22444453075     PISSN: 00319015     EISSN: 13474073     Source Type: Journal    
DOI: 10.1143/JPSJ.67.2205     Document Type: Article

References (20)

1. S. Taniguchi, T. Nishikawa, Y. Yasui, Y. Kobayashi, M. Sato, T. Nishioka, M. Kontani and K. Sano: J. Phys. Soc. Jpn. 64 (1995) 2758.
2. N. Katoh and M. Imada: J. Phys. Soc. Jpn. 64 (1995) 4105.
3. K. Ueda, H. Kontani, M. Sigrist and P.A. Lee: Phys. Rev. Lett. 76 (1996) 1932.
4. K. Sano and K. Takano: J. Phys. Soc. Jpn. 65 (1996) 46.
5. M. Troyer, H. Kontani and K. Ueda: Phys. Rev. Lett. 76 (1996) 3822.
6. M. Albrecht and F. Mila: Phys. Rev. B 53 (1996) 2945.
7. Y. Fukumoto and A. Oguchi: J. Phys. Soc. Jpn. 65 (1996) 1440.
8. T. Miyazaki and D. Yoshioka: J. Phys. Soc. Jpn. 65 (1996) 2370.
9. O.A. Starykh, M.E. Zhitomirsky, D.I. Khomskii, R.R.P. Singh and K. Ueda: Phys. Rev. Lett. 77 (1996) 2558.
10. M.P. Gelfand, Z. Weihong, R.R.P. Singh, J. Oitmaa and C.J. Hamer: Phys. Rev. Lett. 77 (1996) 2794.
11. S.R. White: Phys. Rev. Lett. 77 (1996) 3633.
12. M. Albrecht, F. Mila and D. Poilblanc: Phys. Rev. B 54 (1996) 15856.
13. Z. Weihong, M.P. Gelfand, R.R.P. Singh, J. Oitmaa and G.J. Hamer: Phys. Rev. B 55 (1997) 11377.
14. Y. Fukumoto: J. Phys. Soc. Jpn. 66 (1997) 2178.
15. W.E. Pickett: Phys. Rev. Lett. 79 (1997) 1746.
16. N. Katoh and M. Imada: J. Phys. Soc. Jpn. 67 (1998) 564.
17. Y. Fukumoto and A. Oguchi: J. Phys. Soc. Jpn. 67 (1998) 697.
18. K. Kodama, H. Harashina, H. Sasaki, Y. Kobayashi, M. Kasai, S. Taniguchi, Y. Yasui, M. Sato, K. Kakurai, T. Mori and M. Nishi: J. Phys. Soc. Jpn. 66 (1997) 793.
19. S. Taniguchi, T. Nishikawa, Y. Yasui, Y. Kobayashi, M. Sato, T. Nishioka, M. Kontani and K. Sano: The spin susceptibility was obtained from the raw experimental data using the magnetic field dependence of the magnetization at 4.5 and 5 K. The contribution of impurity spins is expressed by the Brillouin function and a spin value of 1 is obtained. For impurity spins, however, the validity of the Brillouin function beyond the linear term in the magnetic field is not clear since spin values may be different for each impurity. Therefore we follow the standard procedure to obtain the spin part.
20. S. Taniguchi, Y. Kobayashi, M. Kasai, K. Kodama and M. Sato: J. Phys. Soc. Jpn. 66 (1997) 3660.