Full publication list of Prof. Karsten Held
Full publication list of Prof. Karsten Held
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