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Molecular Electronics and Mesoscopic Physics Group



Zaránd Gergelyassociate professor 463-1482
György Mihályprofessor463-2312
László Szunyoghassociate professor463-4109
László Udvardiresearch associate professor463-4109
Balázs Újfalussy research associate professor 392 2222 Ext. 1171
Ôrs Legeza research associate professor 392 2222 Ext. 1190
Pascu Moca Catalin research coworker 463-1482
András Halbritter assistant professor 463-2311
László Bordaresearch coworker463 4108
Orsolya Ujsághyresearch coworker463-3569
Bence Lazarovits Postdoc392 2222 Ext. 1171
Anna TóthPhD student463-2691
Bertalan HorváthPhD student 463-2691
Ákos RappPhD student463-2691




05.10.2006. Gergely Zaránd Keldysh formalism I.
19.10.2006. Gergely Zaránd Keldysh formalism II.
02.11.2006. Bence Lazarovits and Bertalan Horváth Keldysh formalism III.
09.11.2006. András Halbritter Molecular electronics: experiments
16.11.2006. Bertalan Horváth Keldysh formalism IV. Application to Anderson model
30.11.2006. László Udvardi Brief introduction to ab-initio methods I.
7.12.2006. László Udvardi Brief introduction to ab-initio methods II.
14.12.2006. László Szunyogh Introduction to KKR method I.
18.12.2006. László Szunyogh Introduction to KKR method II.




  1. P. Mehta, N. Andrei, P. Coleman, L. Borda, G. Zaránd:
    "Regular and Singular Fermi Liquid fixed points in quantum impurity models",
    Phys. Rev. B 72, 014430 (2005)
  2. J. Martinek, M. Sindel, L. Borda, J. Barnas, R. Bulla, J. König, G. Schön, S. Maekawa, and J. von Delft:
    "Gate-controlled spin-splitting in quantum dots with ferromagnetic leads in the Kondo regime",
    Phys. Rev. B 72, 121302(R) (2005)
  3. R. W. Helmes, M. Sindel, L. Borda, J. von Delft:
    "Absorption and Emission in quantum dots: Fermi surface effects of Anderson excitons",
    Phys. Rev. B 72, 125301 (2005)
  4. E. Novais, A. H. Castro Neto, L. Borda, I. Affleck, G. Zaránd:
    "Frustration of Decoherence in Open Quantum Systems",
    Phys. Rev. B 72, 014417 (2005)
  5. M. Garst, P. Wölfle, L. Borda, J. von Delft, L. I. Glazman:
    "Energy-resolved inelastic electron scattering of a magnetic impurity",
    Phys. Rev. B 72, 205125 (2005)
  6. M. Pustilnik, L. Borda:
    "Phase transition, spin-charge separation, and spin filtering in a quantum dot",
    Phys. Rev. B 73, 201301(R) (2006)
  7. P. Ohresser, H. Bulou, S. S. Dhesi, C. Boeglin, B. Lazarovits, E. Gaudry, I. Chado, J. Faerber , and F. Scheurer:
    "Surface Diffusion of Cr Adatoms on Au(111) by Quantum Tunneling",
    Phys. Rev. Lett. 95, 195901 (2005)
  8. C. Boeglin, P. Ohresser, R. Decker, H. Bulou, F. Scheurer, I. Chado, S.S. Dhesi, E. Gaudry, B. Lazarovits:
    "Spin magnetic moments from single atoms to small Cr clusters",
    Physica Status Solidi B 242, 1775 (2005)
  9. K. Buchta, G. Fáth, Ö. Legeza, and J. Sólyom:
    "Probable absence of a quadrupolar spin-nematic phase in the bilinear-biquadratic spin-1 chain",
    Phys. Rev. B 72, 054433 (2005)
  10. Ö. Legeza, K. Buchta, and J. Sólyom:
    "Unified phase diagram of models exhibiting a neutral-ionic transition",
    Phys. Rev. B 73, 165124 (2006)
  11. G. Fáth, Ö. Legeza, P. Lajkó, and F. Iglói:
    "Logarithmic delocalization of end spins in the S=3/2 antiferromagnetic Heisenberg chain",
    Phys. Rev. B 73, 214447 (2006)
  12. Ö. Legeza and J. Sólyom:
    "Two-Site Entropy and Quantum Phase Transitions in Low-Dimensional Models",
    Phys. Rev. Lett. 96, 116401 (2006)
  13. Ö. Legeza, F. Gebhard, and J. Rissler:
    "Entanglement production by independent quantum channels",
    Phys. Rev. B 74, 195112 (2006)
  14. I. Kézsmárki, G. Mihály, R. Gaál, N. Barisic, H.Berger, L. Forró, C.C. Homes and L. Mihály:
    "Pressure induced suppression of the singlet insulator phase in BaVS3: an infrared optical study",
    Phys. Rev. B 71, 193103 (2005)
  15. M. Csontos, G. Mihály, B. Jankó, T. Wojtowicz, X. Liu and J.K. Furdyna:
    "Pressure induced ferromagnetism in (In,Mn)Sb dilute magnetic semiconductor",
    Nature Materials 4, 447 (2005)
  16. M. Csontos, T. Wojtowicz, X. Liu, M. Dobrowolska, B. Jankó, J.K. Furdyna and G. Mihály:
    "Magnetic scattering of spin polarized carriers in (In,Mn)Sb dilute magnetic semiconductor",
    Phys. Rev. Lett. 95, 227203 (2005)
  17. M.Csontos, J. Balogh, D. Kaptás, L.F. Kiss, and G. Mihály:
    "Magnetic and transport properties of Fe-Ag granular multilayers",
    Phys. Rev. B 73, 184412 (2006)
  18. Sz. Csonka, A. Halbritter and G. Mihály:
    "Pulling gold nanowires with a hydrogen clamp",
    Phys. Rev. B 73, 075405 (2006)
  19. I. Kézsmárki, G. Mihály, R. Gaál, N. Barisic, A. Akrap, H. Berger, L. Forró, C.C. Homes and L. Mihály:
    "Separation of orbital contributions to the optical conductivity in BaVS3",
    Phys. Rev. Lett. 96, 186402 (2006)
  20. I. Kézsmárki, Y. Shimizu, G. Mihály, Y. Tokura, K. Kanoda, and G. Saito:
    "Depressed charge gap in the triangular-lattice Mott insulator k-(ET)2 Cu2 (CN)3",
    Phys. Rev. B 74, 201101(R) (2006)
  21. Gregory A. Fiete, Gergely Zaránd, Boldizsar Janko, Pawel Redlinski, C. Pascu Moca:
    "Positional Disorder, Spin-Orbit Coupling and Frustration in GaMnAs",
    Phys. Rev. B 71, 115202 (2005)
  22. Gergely Zaránd, Catalin Pascu Moca, Boldizsar Janko:
    "Scaling theory of magneto-resistance in disordered local moment ferromagnets",
    Phys. Rev. Lett. 94, 247202 (2005)
  23. Gregory A. Fiete, Gergely Zaránd, Kedar Damle, C. Pascu Moca:
    "Disorder, spin-orbit, and interaction effects in dilute Ga_{1-x}Mn_x As",
    Phys. Rev. B 72, 045212 (2005)
  24. Catalin Pascu Moca, D. C. Marinescu:
    "Longitudinal and spin-Hall conductance of a two-dimensional Rashba system with arbitrary disorder",
    Phys. Rev. B 72, 165335 (2005)
  25. Catalin Pascu Moca, D.C. Marinescu:
    "Longitudinal and spin-Hall conductance of a one-dimensional Aharonov-Bohm ring",
    J. Phys. Condens. Matter 18, 127 (2006)
  26. A. Rapp and G. Zaránd:
    "Dynamical correlations and quantum phase transition in the quantum Potts model",
    Phys. Rev. B 74, 014433 (2006)
  27. H.C. Herper, L. Szunyogh, and P. Entel:
    "Theory of electric transport through Fe/V/Fe trilayers including the effect of impurities",
    Phys. Stat. Sol. B 242, 271 (2005)
  28. I. Reichl, A. Vernes, P. Weinberger, L. Szunyogh, C. Sommers:
    "Reorientation transition in FenAu(100)",
    Phys. Rev. B 71, 214416, (2005)
  29. A. Vernes, P. Weinberger, and L. Szunyogh:
    "Current-induced switching in Py/Cu/Py spin valves",
    Phys. Rev. B 72, 012401 (2005)
  30. R. Hammerling, J. Zabloudil, L. Szunyogh, and P. Weinberger:
    "Solution of the Poisson equation for infite and semi-infite systems including near field corrections for charge densities of arbitrary shape",
    Phil. Mag. 86, 25 (2006)
  31. B. Lazarovits, L. Szunyogh, P. Weinberger:
    "Spin-polarized surface states close to adatoms on Cu(111)",
    Phys. Rev. B 73, 045430 (2006)
  32. I. Reichl, J. Zabloudil, R. Hammerling, A. Vernes, L. Szunyogh, and P. Weinberger:
    "Magneto-optical Kerr effect in perpendicularly magnetized (Co Pt6)n/Pt(111) superstructures",
    Phys. Rev. B 73, 054402 (2006)
  33. J. Zabloudil, R. Hammerling, L. Szunyogh, and P. Weinberger:
    "Bulk and surface properties of metals by full-charge-density screened Korringa-Kohn-Rostoker calculations",
    Phys. Rev. B 73, 115410 (2006)
  34. F. El Gabaly, S. Gallego, C. Munoz, L. Szunyogh, P. Weinberger, C. Klein, A. K. Schmid, K. F. McCarty, and J. de la Figuera:
    "Imaging Spin Reorientation Transitions in Consecutive Atomic Co layers on Ru(0001)",
    Phys. Rev. Lett. 96, 147202 (2006)
  35. L. Udvardi, S. Khmelevskyi, L. Szunyogh, P. Mohn, and P. Weinberger:
    "Helimagnetism and competition of exchange interactions in bulk giant magnetoresi stance alloys based on MnAu2",
    Phys. Rev. B 73, 104446 (2006)
  36. J. B. Staunton, L. Szunyogh, A. Buruzs, B. L. Gyorffy, S. Ostanin, and L. Udvardi:
    "Temperature dependence of magnetic anisotropy: An ab initio approach",
    Phys. Rev. B 74, 144411 (2006)
  37. B. Lazarovits, B. Újfalussy, L. Szunyogh, B. L. Györffy, and P. Weinberger:
    "Magnetic properties of quantum corrals from 'first principles' calculations",
    J. Phys.: Condens. Matter 17, S1037-S1048 (2005)
  38. O. Újsághy, and A. Zawadowski:
    "Kondo Effect on Mesoscopic Scale",
    J. Phys. Soc. Jpn. 74, 80 (2005)
  39. O. Újsághy, A. Jakovác, and A. Zawadowski:
    "Energy relaxation due to magnetic impurities in mesoscopic wires: Logarithmic approach",
    Phys. Rev. B 72, 205119 (2005)
  40. P. San-Jose, G. Zaránd, A. Shnirman, and G. Schön:
    "Geometrical Spin Dephasing in Quantum Dots",
    Phys. Rev. Lett. 97, 076803 (2006)
  41. G. Zaránd, C.-H. Chung, P. Simon, and M. Vojta:
    "Quantum Criticality in a Double-Quantum-Dot System",
    Phys. Rev. Lett. 97, 166802 (2006)
  42. R. K. Kaul, G. Zaránd, S. Chandrasekharan, D. Ullmo, and H. U. Baranger:
    "Spectroscopy of the Kondo Problem in a Box",
    Phys. Rev. Lett. 96, 176802 (2006)
  43. L. Szunyogh, G. Zaránd, S. Gallego, M. C. Munoz, and B. L. Györffy:
    "Effect of Spin-Orbit Interaction on a Magnetic Impurity in the Vicinity of a Surface"
    Phys. Rev. Lett. 96, 067204 (2006)
  44. B. Lazarovits, P. Simon, G. Zaránd, and L. Szunyogh:
    "Exotic Kondo Effect from Magnetic Trimers",
    Phys. Rev. Lett. 95, 077202 (2005)
  45. L. Borda, G. Zaránd, and P. Simon:
    "Dissipation-induced quantum phase transition in a quantum box",
    Phys. Rev. B 72, 155311 (2005)




















  1. 384. Wilhelm and Else Heraeus Seminar
    "Nonequilibrium Transport of Strongly Correlated Systems"















  1. G. Zaránd: Introduction to Keldysh formalism