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Full publication list of Prof. Karsten Held

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PUBLICATION LIST<br />

(until September 2011)<br />

Pr<strong>of</strong>. Dr. <strong>Karsten</strong> <strong>Held</strong><br />

1. H. Das, G. Sangiovanni, A. Valli, K. <strong>Held</strong>, and T. Saha-Dasgupta, Size control <strong>of</strong><br />

charge-orbital order in half-doped manganite, La0.5Ca0.5Mn3, Phys. Rev. Lett. in<br />

print.<br />

2. A. Toschi, A. A. Katanin, G. Rohringer, and K. <strong>Held</strong>, Ab initio DΓA]Ab initio calculations<br />

with the dynamical vertex approximation, Annalen der Physik 523, 698<br />

(2011).<br />

3. K.<strong>Held</strong>,C.Taranto,G.Rohringer,andA.Toschi,HedinEquations,GW,GW+DMFT,<br />

andAllThatin“TheLDA+DMFTapproachtostronglycorrelatedmaterials-Lecture<br />

Notes <strong>of</strong> the Autumn School 2011 Hands-on LDA+DMFT”; eds: E. Pavarini, E. Koch,<br />

D. Vollhardt, A. Lichtenstein; publisher: FZ Jülich GmbH [arxiv.org/abs/1109.3972].<br />

4. P. Wissgott, A. Toschi, G. Sangiovanni, and K. <strong>Held</strong>, Effects <strong>of</strong> electronic correlations<br />

and disorder on the thermopower <strong>of</strong> NaxCoO2, Phys. Rev. B 84, 085129 (2011).<br />

5. M. Uchida, K. Ishizaka, P. Hansmann, Y. Kaneko, Y. Ishida, X. Yang, R. Kumai,<br />

A. Toschi, Y. Onose, R. Arita, K. <strong>Held</strong>, O. K. Andersen, S. Shin, and Y. Tokura,<br />

Pseudogap <strong>of</strong> Metallic Layered Nickelate R2−xSrxNiO4 (R=Nd,Eu) Crystals Measured<br />

Using Angle-Resolved Photoemission Spectroscopy, Phys. Rev. Lett. 106, 027001<br />

(2011).<br />

6. S. Lupi , L. Baldassarre , B. Mansart , A. Perucchi , A. Barinov , P. Dudin , E.<br />

Papalazarou , F. Rodolakis , J. -P. Rueff , J. -P. Itié , S. Ravy , D. Nicoletti , P.<br />

Postorino , P. Hansmann , N. Parragh , A. Toschi , T. Saha-Dasgupta , O. K. Andersen<br />

, G. Sangiovanni , K. <strong>Held</strong> and M. Marsi, A microscopic view on the Mott transition<br />

in chromium-doped V2O3, Nature Communications 1, 105 (2010).<br />

7. P. Hansmann, A. Toschi, Xiaoping Yang, O. K. Andersen, and K. <strong>Held</strong> Electronic<br />

structure <strong>of</strong> nickelates: From two-dimensional heterostructures to three-dimensional<br />

bulk materials, Phys. Rev. B 82, 235123 (2010)<br />

8. D. Nicoletti, O. Limaj, P. Calvani, G. Rohringer, A. Toschi, G. Sangiovanni, M.<br />

Capone, K. <strong>Held</strong>, S. Ono, Yoichi Ando, and S. Lupi, High-Temperature Optical Spectral<br />

Weight and Fermi-liquid Renormalization in Bi-Based Cuprate Superconductors,<br />

Phys. Rev. Lett., 105, 077002 (2010).<br />

1


9. A. Valli, G. Sangiovanni, O. Gunnarsson, A. Toschi, and K. <strong>Held</strong>, Dynamical Vertex<br />

Approximation for Nanoscopic Systems, Phys. Rev. Lett. 104, 246402 (2010).<br />

10. P. Hansmann, R. Arita, A. Toschi, S. Sakai, G. Sangiovanni, and K. <strong>Held</strong>, Dichotomy<br />

between Large Local and Small Ordered Magnetic Moments in Iron-Based Superconductors,<br />

Phys. Rev. Lett., 104, 197002 (2010).<br />

11. F. Rodolakis, P. Hansmann, J.-P. Rueff, A. Toschi, M.W. Haverkort, G. Sangiovanni,<br />

A. Tanaka, T. Saha-Dasgupta, O.K. Andersen, K. <strong>Held</strong>, M. Sikora, I. Alliot, J.-P.<br />

Iti, F. Baudelet, P. Wzietek, P. Metcalf, and M. Marsi, Inequivalent routes across the<br />

Mott transition in V2O3 explored by X-ray absorption, Phys. Rev. Lett., 104, 047401<br />

(2010).<br />

12. A. Toschi, M. Capone, C. Castellani and K. <strong>Held</strong>, Comment on Kinks in the Electronic<br />

Specific Heat” Reply , Phys. Rev. Lett. 104, 059704 (2010).<br />

13. P.Wissgott,A.Toschi,H.Usui,K.Kuroki,andK.<strong>Held</strong>,Enhancement<strong>of</strong>theNaxCoO2<br />

thermopower due to electronic correlations, Phys. Rev. B 82, 201106 (2010).<br />

14. Y.-F. Yang and K. <strong>Held</strong>, Dynamical mean field theory for manganites, Phys. Rev. B<br />

82, 195109 (2010).<br />

15. J. Kunes, R. Arita, P. Wissgott, A. Toschi, H. Ikeda, and K. <strong>Held</strong>, Wien2wannier:<br />

From linearized augmented plane waves to maximally localized Wannier functions,<br />

Comp. Phys. Comm. 181, 1888 (2010).<br />

16. A. Toschi, P. Hansmann, G. Sangiovanni, T. Saha-Dasgupta, O. K. Andersen and K<br />

<strong>Held</strong>,Spectralproperties<strong>of</strong>theMottHubbardinsulator(Cr0.011V0.989)2O3 calculated<br />

by LDA+DMFT, J. Phys.: Conf. Ser. 200 012208 (2010).<br />

17. A. Toschi, M. Capone, C. Castellani, and K. <strong>Held</strong> Kinks: Fingerprints <strong>of</strong> strong<br />

electronic correlations J. Phys.: Conf. Ser. 200 012207 (2010).<br />

18. A.A. Katanin, A. Toschi, and K. <strong>Held</strong>, Comparing pertinent effects <strong>of</strong> antiferromagnetic<br />

fluctuations in the two and three dimensional Hubbard model, Phys. Rev. B 80,<br />

075104 (2009).<br />

19. P. Hansmann, X. Yang, A. Toschi, G. Khaliullin, O. K. Andersen, and K. <strong>Held</strong> Turning<br />

a nickelate Fermi surface into a cuprate-like one through heterostructuring, Phys. Rev.<br />

Lett. 103, 016401 (2009).<br />

20. A. Toschi, M. Capone, C. Castellani and K. <strong>Held</strong>, Kinks in the electronic specific heat,<br />

Phys. Rev. Lett. 102, 076402 (2009).<br />

2


21. A. Perucchi, C. Marini, M. Valentini, P. Postorino, R. Sopracase, P. Dore, P. Hansmann,<br />

O. Jepsen, G. Sangiovanni, A. Toschi, K. <strong>Held</strong>, D. Topwal, D. D. Sarma, S.<br />

Lupi, “Pressure and alloying effects on the metal to in sulator transition in NiS2−xSex<br />

studied by infrared spectroscopy”, Phys. Rev. B 80, 073101 (2009).<br />

22. F.Rodolakis, P.Hansmann, J.P.Rueff, A.Toschi, M.W.Haverkort, G.Sangiovanni, K.<br />

<strong>Held</strong>, M. Sikora, A. Congeduti, J.P. Iti, F. Baudelet, P. Metcalf, M. Marsi, Electronic<br />

correlations in V2O3 studied with K-edge X-ray absorption spectroscopy, Journal <strong>of</strong><br />

Physics: Conference Series 19, 0012092 (2009).<br />

23. K. <strong>Held</strong>, R. Arita, V. Anisimov, K. Kuroki, The LDA+DMFT Route to Identify Good<br />

Thermoelectrics in Properties and Applications <strong>of</strong> Thermoelectric Materials, V. Zlatic,<br />

A. C. Hewson (eds.). The NATO Science for Peace and Security Programme; Springer-<br />

Verlag, 2009, p. 141 - 157.<br />

24. A. Hübel, K. <strong>Held</strong>, J. Weis and K. v. Klitzing, Correlated electron tunneling through<br />

two separate quantum dot systems with strong capacitive interdot coupling, Phys.<br />

Rev. Lett. 101, 186804 (2008).<br />

25. K. <strong>Held</strong>, A. Katanin, and A. Toschi, Dynamical vertex approximation – an introduction,<br />

Prog. Theor. Phys. Suppl. 176, 117 (2008).<br />

26. R. Arita, K. Kuroki, K. <strong>Held</strong>, A. V. Lukoyanov, S. Skornyakov, V. I. Anisimov, Origin<br />

<strong>of</strong> large thermopower in LiRh2O4: Calculation <strong>of</strong> the Seebeck coefficient by the combination<br />

<strong>of</strong> local density approximation and dynamical mean-field theory Phys. Rev.<br />

B 78, 115121 (2008).<br />

27. K. <strong>Held</strong>, O. K. Andersen, M. Feldbacher, A. Yamasaki, Y.-F. Yang, Bandstructure<br />

meets many-body theory: the LDA + DMFT method, J. Phys. Cond. Matter 20,<br />

064202 (2008).<br />

28. L. Baldassarre, A. Perucchi, D. Nicoletti, A. Toschi, G. Sangiovanni, K. <strong>Held</strong>, M.<br />

Capone, M. Ortolani, L. Malavasi, M. Marsi, P. Metcalf, P. Postorino, S. Lup i, Quasiparticle<br />

evolution and pseudogap formation in V2O3: An infrared sp ectroscopy study,<br />

Phys. Rev. B 77, 113107 (2008).<br />

29. K. <strong>Held</strong>, Electronic Structure Calculations using Dynamical Mean Field Theory, Advances<br />

in Physics 56, 829 (2007).<br />

30. R. Arita, K. <strong>Held</strong>, A.V. Lukoyanov and V.I. Anisimov, Doped Mott insulator as the<br />

origin <strong>of</strong> heavy Fermion behavior in LiV2O4, Phys. Rev. Lett. 98, 166402 (2007).<br />

31. R. Arita, A. Yamasaki, K. <strong>Held</strong>, J. Matsuno and K. Kuroki, Sr2(Ba2)VO4 under pres-<br />

3


sure – an orbital switch and potential d 1 superconductor, Phys. Rev. B 75, 174521<br />

(2007).<br />

32. K. Byczuk, M. Kollar, K. <strong>Held</strong>, Y.-F. Yang, I. A. Nekrasov, Th. Pruschke and D.<br />

Vollhardt, Kinks in the dispersion <strong>of</strong> strongly correlated electrons, Nature Physics 3,<br />

168 (2007).<br />

33. Y.-F. Yang and K. <strong>Held</strong>, Localization <strong>of</strong> strongly correlated electrons as Jahn-Teller<br />

polarons in manganites, Phys. Rev. B 76, 212401 (2007).<br />

34. R. Arita, A. Yamasaki, K. <strong>Held</strong>, J. Matsuno and K. Kuroki, Design <strong>of</strong> a d(1)-analogue<br />

<strong>of</strong> cuprates: Sr2VO4 and Ba2VO4 under pressure, J. Phys.: Condens. Matter Phys.<br />

19, 365204 (2007).<br />

35. A.Toschi,A.A.KataninandK.<strong>Held</strong>,Dynamicalvertexapproximation-astepbeyond<br />

dynamical mean field theory, Phys. Rev. B 75, 045118 (2007).<br />

36. R. Arita and K. <strong>Held</strong>, Dynamical cluster approximation study <strong>of</strong> d- and p-wave pairing<br />

in the Hubbard model at T → 0, J. Magn. Magn. Mater. 310, 645 (2007).<br />

37. A. Yamasaki, M. Feldbacher, Y.-F. Yang, O. K. Andersen and K. <strong>Held</strong>, Pressureinducedmetal-insulatortransitioninLaMnO3<br />

isnot<strong>of</strong>Mott-Hubbardtype,Phys.Rev.Lett.<br />

96, 166401 (2006).<br />

38. S. Sakai, R. Arita, K. <strong>Held</strong> and H. Aoki, Quantum Monte Carlo study for multiorbital<br />

systems with preserved spin and orbital rotational symmetry, Phys. Rev. B 74, 155102<br />

(2006).<br />

39. M. Feldbacher, F. F. Assaad and K. <strong>Held</strong>, Comment on “Projective Quantum Monte<br />

Carlo Method for the Anderson Impurity Model and its Application to Dynamical<br />

Mean Field Theory” Reply, Phys. Rev. Lett. 96, 139702 (2006).<br />

40. G. Sangiovanni, A. Toschi, E. Koch, K. <strong>Held</strong>, M. Capone, C. Castellani, O. Gunnarsson,<br />

S.-K. Mo, J. W. Allen, H.-D. Kim, A. Sekiyama, A. Yamasaki, S. Suga and P.<br />

Metcalf, Static vs. dynamical mean field theory <strong>of</strong> Mott antiferromagnets, Phys. Rev.<br />

B 73, 205121 (2006).<br />

41. R. Arita and K. <strong>Held</strong>, Crossover from d- to p-wave pairing in the t-t’ Hubbard model<br />

at zero tempera ture, Phys. Rev. B 73, 064515 (2006).<br />

42. I. A. Nekrasov, K. <strong>Held</strong>, G. Keller, D. E. Kondakov, Th. Pruschke, M. Kollar, O. K.<br />

Andersen, V. I. Anisimov and D. Vollhardt, Momentum-resolved spectral functions <strong>of</strong><br />

SrVO3 calculated by LDA+DMFT, Ph ys. Rev. B 73, 155112 (2006).<br />

4


43. K. <strong>Held</strong>, I.A. Nekrasov, G. Keller, V. Eyert, N. Blümer, A. K. McMahan, R. T.<br />

Scalettar, Th. Pruschke, V. I. Anisimov and D. Vollhardt, Rea<strong>list</strong>ic investigations<br />

<strong>of</strong> correlated electron systems with LDA+DMFT, Physica Status Solidi B 243, 2599<br />

(2006).<br />

44. Y.-F. Yang and K. <strong>Held</strong>, Nonequilibrium transport through parallel double quantum<br />

dots in the Kondo re gime, Phys. Rev. B 72, 235308 (2005).<br />

45. R. Arita and K. <strong>Held</strong>, Orbital-selective Mott-Hubbard transition in the two-band<br />

Hubbard model, Ph ys. Rev. B 72, 201102 (R) (2005).<br />

46. I. A. Nekrasov, G. Keller, D. E. Kondakov, A. V. Kozhevnikov, Th. Prusc hke, K.<br />

<strong>Held</strong>, D. Vollhardt and V. I. Anisimov, Comparative study <strong>of</strong> correlation effects in<br />

CaVO3 and SrVO3, Phys. Rev. B 72, 155106 (2005).<br />

47. D. Vollhardt, K. <strong>Held</strong>, G. Keller, R. Bulla, Th. Pruschke, I.A. Nekrasov and V. I.<br />

Anisimov, Dynamical Mean-Field Theory and Its Applications to Real Materials, J.<br />

Phys. Soc. Jap. 74, 136 (2005).<br />

48. M.Feldbacher, K.<strong>Held</strong>andF.F.Assaad, Mott-HubbardTransitionind = ∞revisited<br />

by Projective Quantum Monte Carlo Simulations, Physica B 359-361, 654 (2005).<br />

49. M. Feldbacher, K. <strong>Held</strong> and F. F. Assaad, Projective Quantum Monte Carlo Method<br />

fortheAndersonImpurityModelanditsApplicationtoDynamicalMeanFieldTheory,<br />

Phys. Rev. Lett. 93, 136405 (2004).<br />

50. S.-K. Mo, H.-D. Kim, J. W. Allen, G.-H. Gweon, J. D. Denlinger, J.- H. Park,<br />

A. Sekiyama, A. Yamasaki, S. Suga, P. Metcalf and K. <strong>Held</strong>, Filling <strong>of</strong> the Mott-<br />

Hubbard gap in the high temperature photoemission spectrum <strong>of</strong> (V0.972Cr0.028)2O3,<br />

Phys. Rev. Lett. 93, 76404 (2004).<br />

51. K. <strong>Held</strong>, J. W. Allen, V. I. Anisimov, V. Eyert, G. Keller, H.-D. Kim, S.-K. Mo and D.<br />

Vollhardt, Two Aspects <strong>of</strong> the Mott-Hubbard Trans ition in Cr-doped V2O3, Physica<br />

B 359-361, 642 (2005).<br />

52. G. Keller, K. <strong>Held</strong>, V. Eyert, D. Vollhardt and V. I. Anisimov, Electronic Structure <strong>of</strong><br />

Paramagnetic V2O3: Strongly Correlated Metallic and Mott Insulating Phase, Phys.<br />

Rev. B 70, 205116 (2004).<br />

53. A. Sekiyama, H. Fujiwara, S. Imada, S. Suga, H. Eisaki, S. I. Uchida, K. T akegahara,<br />

H. Harima, Y. Saitoh, I. A. Nekrasov, G. Keller, D. E. Kondakov, A. V .<br />

Kozhevnikov, Th. Pruschke, K. <strong>Held</strong>, D. Vollhardt and V. I. Anishimov, Mutual ExperimentalandTheoreticalValidation<strong>of</strong>BulkPhotoemissionSpectra<strong>of</strong>Sr1−xCaxVO3,<br />

5


Phys. Rev. Lett. 93, 156402 (2004).<br />

54. A.K.McMahan, K.<strong>Held</strong>andR.T.Scalettar, ThermodynamicandSpectralProperties<br />

<strong>of</strong>CompressedCeCalculatedbytheCombination<strong>of</strong>theLocalDensityApproximation<br />

and Dynamical Mean Field Theory, AIP Conf. Proc. 673, 168 (2003).<br />

55. K. <strong>Held</strong>, V. I. Anisimov, V. Eyert, G. Keller, A. K. McMahan, I. A. Nekras ov and<br />

D. Vollhardt, LDA+DMFT investigations <strong>of</strong> transition metal oxides and f-electron<br />

materials, Adv. Solid State Phys. 43, 267 (2003).<br />

56. S.-K. Mo, J. D. Denlinger, H.-D. Kim, J.-H. Park, J. W. Allen, A. Sekiyama , A. Yamasaki,<br />

K. Kadono, S. Suga, Y. Saitoh, T. Muro, P. Metcalf, G. Keller, K. <strong>Held</strong>,<br />

V. Eyert, V. I .Anisimov and D. Vollhardt, Prominent quasi-particle peak in the<br />

photoemission spectrum <strong>of</strong> the metallic phase <strong>of</strong> V2O3, Phys. Rev. Lett. 90, 186403<br />

(2003).<br />

57. K. <strong>Held</strong>, E. Eisenberg and B. L. Altshuler, Random matrix theory for closed quantum<br />

dots with weak spin-orbit coupling, Phys. Rev. Lett. 90, 106802 (2003).<br />

58. I. A. Nekrasov, Z. V. Pchelkina, G. Keller, Th. Pruschke, K. <strong>Held</strong>, A. Krim mel,<br />

D. Vollhardt and V. I. Anisimov, Orbital state and magnetic properties <strong>of</strong> LiV2O4,<br />

Phys. Rev. B 67, 085111 (2003).<br />

59. A. K. McMahan, K. <strong>Held</strong> and R. T. Scalettar, Thermodynamic and spectral properties<br />

<strong>of</strong> compressed Ce calculated by the merger <strong>of</strong> the local density approximation and<br />

dynamical mean field theory, Phys. Rev. B 67, 075108 (2003).<br />

60. K. <strong>Held</strong>, E. Eisenberg and B. L. Altshuler, Phase relaxation <strong>of</strong> one-particle states in<br />

closed quantum dots, Chaos, Solitons and Fractals 16, 417 (2003).<br />

61. K. <strong>Held</strong>, I. A. Nekrasov, G. Keller, V. Eyert, N. Bl”umer, A. K. McMahan, R. T.<br />

Scalettar,T.Pruschke,V.I.AnisimovandD.Vollhrdt,“TheLDA+DMFTapproachto<br />

correlated electron systems in Quantum Simulations <strong>of</strong> Complex Many-Body Systems:<br />

From Theory to Algorithms, J. Grotendorst, D. Marks and A. Muramatsu (ed.), NIC<br />

Series Volume 10, S. 175 (2002) [cond-mat/0112079].<br />

62. E. Eisenberg, K. <strong>Held</strong> and B. L. Altshuler, Dephasing times in closed quantum dots,<br />

Phys. Rev. Lett. 88, 136801 (2002).<br />

63. K.<strong>Held</strong>,E.Eisenberg,andB.L.Altshuler,Effect<strong>of</strong>spectralfluctuationsonconductancepeak<br />

height statistics in quantum dots, Phys. Rev. B 66, 033308 (2002).<br />

64. K. <strong>Held</strong>, A. K. McMahan and R. T. Scalettar, Cerium volume collapse: Results from<br />

6


the merger <strong>of</strong> Dynamical Mean-Field Theory and the Local Density Approximation,<br />

Phys. Rev. Lett. 87, 276404 (2001).<br />

65. K. <strong>Held</strong>, I. A. Nekrasov, N. Blümer, V. I. Anisimov and D. Vollhardt, Rea<strong>list</strong>ic modeling<br />

<strong>of</strong> strongly correlated electron systems: An introduction to the LDA+DMFT<br />

approach, Int. J. Mod. Phys. B 15, 2611 (2001).<br />

66. K. <strong>Held</strong>, G. Keller, V. Eyert, V. I. Anisimov and D. Vollhardt, Mott-Hubbard Metal-<br />

Insulator Transition in Paramagnetic V2O3: An LDA+DMFT(QMC) Study, Phys.<br />

Rev. Lett. 86, 5345 (2001).<br />

67. D. Vollhardt, N. Blumer, K. <strong>Held</strong> and M. Kollar, Metallic Ferromagnetism – An Electronic<br />

Correlation Phenomenon in Band-Ferromagnetism, K. Baberschke, M. Donath<br />

and W. Nolting (ed.), Lecture Notes in Physics, Vol. 580, (Springer, Heidelberg 2001),<br />

S. 191.<br />

68. I. A. Nekrasov, K. <strong>Held</strong>, N. Blumer, A. I. Poteryaev, V. I. Anisimov and D. Vollhardt,<br />

Calculation <strong>of</strong> photoemission spectra <strong>of</strong> the doped Mott insulator La1−xSrxTiO3 using<br />

LDA+DMFT(QMC), Eur. Phys. J. B 18, 55 (2000).<br />

69. K. <strong>Held</strong> and R. Bulla, Mott transition <strong>of</strong> the f-electron system in the periodic Anderson<br />

model with nearest neighbor hybridization, Eur. Phys. J. B 17, 7 (2000).<br />

70. K. <strong>Held</strong>, C. Huscr<strong>of</strong>t, R. T. Scalettar and A. K. McMahan, Similarities between the<br />

Hubbard and Periodic Anderson Models at finite temperatures, Phys. Rev. Lett. 85,<br />

373 (2000).<br />

71. K. <strong>Held</strong> and D. Vollhardt Electronic Correlations in Manganites, Phys. Rev. Lett. 84,<br />

5168 (2000).<br />

72. D. Vollhardt, N. Blumer, K. <strong>Held</strong>, M. Kollar, J. Schlipf, M. Ulmke and J. Wahle,<br />

Metallic ferromagnetism: Progress in our understanding <strong>of</strong> an old strong-coupling<br />

problem, Advances in Solid State Physics 38, 383 (1999).<br />

73. K. <strong>Held</strong> and D. Vollhardt, Microscopic conditions favoring itinerant ferromagnetism:<br />

Hund’s rule coupling and orbital degeneracy, Eur. Phys. J. B 5, 473 (1998).<br />

74. J. Wahle, N. Blumer, J. Schlipf, K. <strong>Held</strong> and D. Vollhardt, Microscopic conditions<br />

favoring itinerant ferromagnetism, Phys. Rev. B 58, 12749 (1998).<br />

75. K. <strong>Held</strong>, E. Rota Kops, B. J. Krause, W. M. Wells III, R. Kikinis and H.-W. Muller-<br />

Gartner, Markov random field segmentation <strong>of</strong> brain MR images, IEEE Trans. Med.<br />

Imag. 16, 878 (1997).<br />

7


76. K.<strong>Held</strong>, M.Ulmke, N.BlumerandD.Vollhardt, Correlated-electrontheory<strong>of</strong>strongly<br />

anisotropic metamagnets, Phys. Rev. B 56, 14469 (1997).<br />

77. D.Vollhardt,N.Blumer,K.<strong>Held</strong>,M.Kollar,J.SchlipfandM.Ulmke,Non-perturbative<br />

approaches to magnetism in strongly correlated electron systems, Z. Phys. B 103, 283<br />

(1997).<br />

78. E. Rota Kops, K. <strong>Held</strong>, B. J. Krause and H. W. Muller-Gartner, Segmentierung von<br />

MR Hirnbildern mit Hilfe von Markov-Random-Feldern, Proceedings <strong>of</strong> the Aachen<br />

workshop Bildverarbeitung fur die Medizin, November 1996, T. Lehmann, I. Scholl and<br />

K. Spitzer (ed.) (Augustinus, Aachen, 1996).<br />

79. K. <strong>Held</strong>, M. Ulmke and D. Vollhardt, Correlated-electron theory <strong>of</strong> metamagnetism in<br />

strongly anisotropic antiferromagnets, Mod. Phys. Lett. B 10, 203 (1996).<br />

8

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