Abstract.
We study the effect of strong antiferromagnetic exchange interactions in metallic grains in the Coulomb blockade regime. These interactions can be large in superconducting systems or in metallic antiferromagnetic particles. We extend the standard description of the grain in terms of a single collective variable, the charge and its conjugated phase, to include the spin degree of freedom. The suppression of spin fluctuations enhances the tendency towards Coulomb blockade. The effective charging energy and conductance are calculated numerically in the regime of large grain-lead coupling.
Similar content being viewed by others
References
D.V. Averin, K.K. Likharev, in Mesoscopic Phenomena in Solids, edited by B.L. Altshuler, P.A. Lee, R.A. Webb (Elsevier, Amsterdam, 1991)
Single Electron Tunneling edited by H. Grabert, M.H. Devoret (Plenum, New York, 1992)
G. Schön, A.D. Zaikin, Phys. Rep. 198, 238 (1990)
F. Guinea, G. Schön, J. Low, Temp. Phys. 69, 219 (1986)
S.V. Panyukov, A.D. Zaikin, Phys. Rev. Lett. 67, 3168 (1991)
C.P. Herrero, G. Schön, A.D. Zaikin, Phys. Rev. B 59, 5728 (1999)
V. Ambegaokar, U. Eckern, G. Schön, Phys. Rev. Lett. 48, 1745 (1982)
T.L. Ho, Phys. Rev. Lett. 51, 2060 (1983)
E. Ben-Jacob, E. Mottola, G. Schön, Phys. Rev. Lett. 51, 2064 (1983)
I.L. Kurland, I.L. Aleiner, B.L. Altshuler, Phys. Rev. B 62, 14886 (2000)
I.L. Aleiner, P.W. Brouwer, L.I. Glazman, Phys. Rep. 358, 309 (2002)
Y. Alhassid, T. Rupp, A. Kaminski, L. Glazman (2002), arXiv:cond-mat/0212072
Y. Alhassid, T. Rupp, Phys. Rev. Lett. 91, 056801 (2003)
G. Usaj, H.U. Baranger, Phys. Rev. B 67, 121308(R) (2003)
K.A. Matveev, L.I. Glazman, A.I. Larkin, Phys. Rev. Lett. 85, 2789 (2000)
G.R. Stewart, Rev. Mod. Phys. 56, 755 (1984)
J.A. Hertz, Phys. Rev. B 14, 1165 (1976)
P.W. Anderson, Phys. Rev. 86, 694 (1952)
F. Guinea, G. Schön, Physica B 152, 165 (1988)
C. Bruder, R. Fazio, G. Schön, Phys. Rev. B 50, 12766 (1994)
M. Iansiti, M. Tinkham, A.T. Johnson, W.F. Smith, C.J. Lobb, Phys. Rev. B 39, 6465 (1989)
L.D. Landau, E.M. Lifschitz, Quantum Mechanics (Pergamon, Oxford, 1977)
E. Bascones, C.P. Herrero, F. Guinea, G. Schön, Phys. Rev. B 61, 16778 (2000)
W. Zwerger, M. Scharpf, Zeit. Phys. B 85, 421 (1991)
R.B. Griffiths, J. Math. Phys. 8, 478 (1967)
D.P. Arovas, F. Guinea, C.P. Herrero, P. San-Jose, Phys. Rev. B 68, 085306 (2003)
I.L. Aleiner, P.W. Brouwer, L.I. Glazman, Phys. Rep. 358, 309 (2002)
B. Mühlschlegel, D.J. Scalapino, R. Denton, Phys. Rev. B 6, 1767 (1972)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
San-Jose, P., Herrero, C., Guinea, F. et al. Interplay between exchange interactions and charging effects in metallic grains. Eur. Phys. J. B 54, 309–314 (2006). https://doi.org/10.1140/epjb/e2006-00453-9
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1140/epjb/e2006-00453-9