List of Publications

  1. R. Bulla
    Correlated electrons in a dissipative environment
    Eur. Phys. J. Special Topics 180, 153 (2010).

  2. H.-J. Lee, K. Byczuk, and R. Bulla
    Numerical renormalization group for the bosonic single-impurity Anderson model: Dynamics
    Phys. Rev. B 82, 054516 (2010).

  3. M. Vojta, L. Fritz, and R. Bulla
    Gate-controlled Kondo screening in graphene: Quantum criticality and electron-hole asymmetry
    Europhys. Lett. 90, 27006 (2010).

  4. S. Tornow, R. Bulla, F.B. Anders, and G. Zwicknagl
    Multiple-charge transfer and trapping in DNA dimers
    arXiv:0911.5161.

  5. M. Vojta, R. Bulla, F. Güttge, and F. Anders
    The mass-flow error in the Numerical Renormalization Group method and the critical behavior of the sub-ohmic spin-boson model
    Phys. Rev. B 81, 075122 (2010).

  6. A. Winter, H. Rieger, M. Vojta, and R. Bulla
    The quantum phase transition in the sub-ohmic spin-boson model: Quantum Monte-Carlo study with a continuous imaginary time cluster algorithm
    Phys. Rev. Lett. 102, 030601 (2009).

  7. S. Tornow, R. Bulla, F. B. Anders, and A. Nitzan
    Dissipative two-electron transfer: A numerical renormalization group study
    Phys. Rev. B 78, 035434 (2008).

  8. T. Hecht, A. Weichselbaum, J. von Delft, and R. Bulla
    Numerical renormalization group calculation of near-gap peaks in spectral functions of the Anderson model with superconducting leads
    J. Phys.: Condens. Matter 20, 275213 (2008).

  9. M. Sindel, L. Borda, J. Martinek, R. Bulla, J. König, G. Schön, S. Maekawa, and J. von Delft
    Kondo quantum dot coupled to ferromagnetic leads: Numerical renormalization group study
    Phys. Rev. B 76, 045321 (2007).

  10. R. Bulla, S. Tornow, and F. Anders
    Electronic Correlations in Electron Transfer Systems
    Adv. Solid State Phys. 47, 69 (2008).

  11. R. Bulla, T. Costi, and Th. Pruschke
    Numerical renormalization group method for quantum impurity systems
    Rev. Mod. Phys. 80, 395 (2008).

  12. J.-X. Zhu, S. Kirchner, R. Bulla, and Q. Si
    Zero-Temperature Magnetic Transition in an Easy-Axis Kondo Lattice Model
    Phys. Rev. Lett. 99, 227204 (2007).

  13. F.B. Anders, R. Bulla, and M. Vojta
    Equilibrium and Nonequilibrium Dynamics of the Sub-Ohmic Spin-Boson Model
    Phys. Rev. Lett. 98, 210402 (2007).

  14. H.-J. Lee and R. Bulla
    Quantum Phase Transitions in the Bosonic Single-Impurity Anderson Model
    Eur. Phys. J. B 56, 199 (2007).

  15. S. Tornow, N.-H. Tong, and R. Bulla
    Dissipative Exciton Transfer in Donor-Bridge-Acceptor Systems: Numerical Renormalization Group Calculation of Equilibrium Properties
    J. Phys.: Condens. Matter 18, 5985 (2006).

  16. R. Bulla, R. Gutierrez, and G. Cuniberti
    Modeling molecular conduction in DNA wires: Charge transfer theories and dissipative quantum transport
    in Modern methods for theoretical physical chemistry of biopolymers, edited by S. Tanaka, J. Lewis, and E. Starikow, Elsevier (2006)
    cond-mat/0604440.

  17. H.-J. Lee, R. Bulla, and M. Vojta
    Numerical Renormalization Group for Impurity Quantum Phase Transitions: Structure of Critical Fixed Points
    J. Phys.: Condens. Matter 17, 6935 (2005).

  18. S. Tornow, N.-H. Tong, and R. Bulla
    Electron Transfer in Donor-Acceptor Systems: Many-Particle Effects and Influence of Electronic Correlations
    Europhys. Lett. 73, 913 (2006).

  19. R. Bulla
    Dynamical Mean-Field Theory - from Quantum Impurity Physics to Lattice Problems
    Phil. Mag. 86, 1877 (2006).

  20. Th. Pruschke and R. Bulla
    Hund's coupling and the metal-insulator transition in the two-band Hubbard model
    Eur. Phys. J. B 44, 217 (2005).

  21. M. Vojta, N.-H. Tong, and R. Bulla
    Quantum phase transitions in the sub-ohmic spin-boson model: Failure of the quantum-classical mapping
    Phys. Rev. Lett. 94, 070604 (2005).
    Erratum:
    Phys. Rev. Lett. 102, 249904 (2009).

  22. D. Vollhardt, G. Keller, K. Held, Th. Pruschke, R. Bulla, I.A. Nekrasov, and V.I. Anisimov
    Dynamical Mean Field Theory and Its Applications to Real Materials
    J. Phys. Soc. Jpn. 74, 136 (2005).

  23. R. Bulla, H.-J. Lee, N.-H. Tong, and M. Vojta
    Numerical Renormalization Group for Quantum Impurities in a Bosonic Bath
    Phys. Rev. B 71, 045122 (2005).

  24. 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).

  25. H.-J. Lee and R. Bulla
    Quantum Critical Points in Quantum Impurity Systems
    Physica B 359-361, 56 (2005).

  26. N.-H. Tong, S. Shen, and R. Bulla
    Charge ordering and phase separation in the infinite dimensional extended Hubbard model
    Phys. Rev. B 70, 085118 (2004).

  27. R. Zitzler, Th. Pruschke, and R. Bulla
    Itinerant ferromagnetism, phase separation and first-order paramagnetic metal to antiferromagnetic insulator transitions - novel insights to the frustrated Hubbard model
    J. Magn. & Magn. Mater. 272-76, 21 (2004).

  28. R. Zitzler, N.-H. Tong, Th. Pruschke, and R. Bulla
    Phase diagram of the frustrated Hubbard model
    Phys. Rev. Lett. 93, 016406 (2004).

  29. R. Bulla, N.-H. Tong, and M. Vojta
    Numerical Renormalization Group for Bosonic Systems and Application to the Subohmic Spin-Boson Model
    Phys. Rev. Lett. 91, 170601 (2003).

  30. H.-A. Krug von Nidda, R. Bulla, N. Büttgen, M. Heinrich, and A. Loidl
    Heavy Fermions in transition metals and transition-metal oxides
    Eur. Phys. J. B 34, 399 (2003).

  31. J.K. Freericks, T.P. Devereaux, R. Bulla, and Th. Pruschke
    Nonresonant inelastic light scattering in the Hubbard model
    Phys. Rev. B 67, 155102 (2003).

  32. R. Bulla and M. Vojta
    Quantum Phase Transitions in Models of Magnetic Impurities
    in Concepts in Electron Correlations,
    A.C. Hewson and V. Zlatic (eds.), Kluwer Academic Publishers, Dordrecht (2003), 209.

  33. J.K. Freericks, T.P. Devereaux, and R. Bulla
    Inelastic Light Scattering and the Correlated Metal-Insulator Transition
    in Concepts in Electron Correlations,
    A.C. Hewson and V. Zlatic (eds.), Kluwer Academic Publishers, Dordrecht (2003), 115.

  34. Y. Ono, M. Potthoff, and R. Bulla
    Mott transitions in correlated electron systems with orbital degrees of freedom
    Phys. Rev. B 67, 035119 (2003).

  35. Y. Ono, R. Bulla, and M. Potthoff
    Mott Transition in the multi-band Hubbard model in infinite dimensions
    Physica B 329, 942 (2003).

  36. J.K. Freericks, T.P. Devereaux, and R. Bulla
    Inelastic Light Scattering and the Correlated Metal-Insulator Transition
    Acta Phys. Pol. B 34, 737 (2003).

  37. D. Meyer, A.C. Hewson, and R. Bulla
    Gap formation and soft phonon mode in the Holstein model
    Phys. Rev. Lett. 89, 196401 (2002).

  38. K. Byczuk, R. Bulla, R. Claessen, and D. Vollhardt
    Phenomenological Modeling of Photoemission Spectra in Strongly Correlated Electron Systems
    Int. Journ. Mod. Phys. B 16, 3759 (2002) .

  39. M. Sing, M. Karlsson, D. Schrupp, R. Claessen, M. Heinrich, V. Fritsch, H.-A. Krug von Nidda, A. Loidl, and R. Bulla
    Photoemission study of polycrystalline Gd1-xSrxTiO3+delta: correlation and surface effects
    cond-mat/0205067.

  40. M. Vojta, R. Zitzler, R. Bulla, and Th. Pruschke
    Kondo screening in d-wave superconductors in a Zeeman field and implications for STM spectra of Zn-doped cuprates
    Phys. Rev. B 66, 134527 (2002).

  41. R. Zitzler, Th. Pruschke, and R. Bulla
    Magnetism and Phase Separation in the Ground State of the Hubbard Model
    Eur. Phys. J. B 27, 473 (2002).

  42. M. Vojta and R. Bulla
    A fractional-spin phase in the power-law Kondo model
    Eur. Phys. J. B 28, 283 (2002).

  43. J.K. Freericks, T.P. Devereaux, and R. Bulla
    B1g Raman scattering through a quantum critical point
    Acta Physica Polonica B 32, 3219 (2001).

  44. M. Vojta and R. Bulla
    Kondo effect of impurity moments in d-wave superconductors: Quantum phase transition and spectral properties
    Phys. Rev. B 65, 014511 (2001).

  45. M. Vojta, R. Bulla, and W. Hofstetter
    Quantum phase transitions in models of coupled magnetic impurities
    Phys. Rev. B 65, 140405(R) (2001).

  46. J.K. Freericks, T.P. Devereaux, and R. Bulla
    Exact theory for electronic Raman scattering of correlated materials in infinite dimensions
    Phys. Rev. B 64, 233114 (2001).

  47. Y. Ono, R. Bulla, A.C. Hewson, and M. Potthoff
    Critical behaviour near the metal-insulator transition of a doped Mott insulator
    Eur. Phys. J. B 22, 283 (2001).

  48. R. Bulla, T.A. Costi, and D. Vollhardt
    Finite temperature numerical renormalization group study of the Mott-transition
    Phys. Rev. B 64, 045103 (2001).

  49. A.C. Hewson, S.C. Bradley, R. Bulla, and Y. Ono
    Renormalization Group Approaches to Strongly Correlated Electron Systems
    Int. Journ. Mod. Phys B 15, 2549 (2001).

  50. Y. Ono, R. Bulla, and A.C. Hewson
    Phase diagram of the Mott Transition in a two-band Hubbard model in infinite dimensions
    Eur. Phys. J. B 19, 375 (2001).

  51. R. Bulla and Th. Pruschke
    Strong electronic correlations and low energy scales
    in Open Problems in Strongly Correlated Electron Systems,
    J. Bonca et al., eds., Kluwer Academic Publishers, Dordrecht (2001), 381.

  52. K. Held and R. Bulla
    Mott-transition of the f-electron system in the periodic Anderson model with nearest neighbor hybridization
    Eur. Phys. J. B 17, 7 (2000).

  53. R. Bulla
    The Numerical Renormalization Group Method for correlated electrons
    Adv. Solid State Phys. 40, 169 (2000).

  54. W. Hofstetter, R. Bulla, and D. Vollhardt
    Anderson impurity in a correlated conduction band
    Phys. Rev. Lett. 84, 4417 (2000).

  55. Th. Pruschke, R. Bulla, and M. Jarrell
    Low-energy scale of the periodic Anderson model
    Phys. Rev. B 61, 12799 (2000) .

  56. R. Bulla, M.T. Glossop, D.E. Logan, and Th. Pruschke
    The soft-gap Anderson model: comparison of renormalization group and local moment approaches
    J. Phys.: Condens. Matter 12, 4899 (2000).

  57. Th. Pruschke, R. Bulla, and M. Jarrell
    Exhaustion physics in heavy fermion systems: A T=0 NRG study
    Physica B 281-282, 47 (2000).

  58. R. Bulla and M. Potthoff
    ``Linearized'' Dynamical Mean-Field Theory for the Mott-Hubbard transition
    Eur. Phys. J. B 13, 257 (2000).

  59. S.C. Bradley, R. Bulla, A.C. Hewson, and G.-M. Zhang
    Spectral Densities of Response Functions for the O(3) Symmetric Anderson and Two Channel Kondo models
    Eur. Phys. J. B 11, 535 (1999).

  60. R. Bulla
    Zero temperature metal-insulator transition in the infinite-dimensional Hubbard model
    Phys. Rev. Lett. 83, 136 (1999).

  61. R. Pietig, R. Bulla, and S. Blawid
    Reentrant charge order transition in the extended Hubbard Model
    Phys. Rev. Lett. 82, 4046 (1999).

  62. R. Pietig, S. Blawid, and R. Bulla
    Charge ordering in the extended Hubbard Model
    Physica B: Condens. Matter 259-261, 769 (1999).

  63. S.C. Bradley, R. Bulla, and A.C. Hewson
    Spectral densities for response functions of a marginal fermi liquid model
    Physica B: Condens. Matter 259-261, 362 (1999).

  64. R. Bulla, Th. Pruschke, and A.C. Hewson
    Metal-Insulator transition in the Hubbard Model
    Physica B: Condens. Matter 259-261, 721 (1999).

  65. G.-M. Zhang, A.C. Hewson, and R. Bulla
    Majorana Fermion formulation of the two channel Kondo model
    Solid State Commun. 112, 105 (1999).

  66. R. Bulla, A.C. Hewson, and Th. Pruschke
    Numerical Renormalization Group Calculations for the Self-energy of the impurity Anderson model
    J. Phys.: Condens. Matter 10, 8365 (1998).

  67. R. Bulla, Th. Pruschke, and A.C. Hewson
    Anderson impurity in pseudo-gap Fermi systems
    J. Phys.: Condens. Matter 9, 10463 (1997).

  68. R. Bulla, A.C. Hewson, and G.-M. Zhang
    Low energy fixed points of the sigma-tau and the O(3) symmetric Anderson models
    Phys. Rev. B 56, 11721 (1997).

  69. R. Bulla and A.C. Hewson
    Numerical Renormalization Group Study of the O(3)-symmetric Anderson Model
    Z. Phys. B 104, 333 (1997).

  70. R. Bulla and A.C. Hewson
    Numerical renormalization group study of the `compactified' Anderson model
    Physica B 230-232, 627 (1997).

  71. Th. Pruschke and R. Bulla
    Correlated Lattice models in the Local Approximation - Aspects of a Numerical Renormalization Group Treatment
    J. Low Temp. Phys. 99, 611 (1995).

  72. R. Bulla, J. Keller, and Th. Pruschke
    Functional Integral Approach to the U=infinity Single Impurity Anderson Model
    Z. Phys. B 94, 195 (1994).

  73. J. Keller, R. Bulla, T. Höhn, and K.W. Becker
    Electron-phonon-interaction in Heavy Fermion Systems
    Physica B 163, 667 (1990).

  74. J. Keller, R. Bulla, T. Höhn, and K.W. Becker
    Electron-phonon-interaction in Heavy Fermion Systems
    Phys. Rev. B 41, 1878 (1990).

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