Publications

Book

• Symmetries in Physics, W. Ludwig & C. Falter, Springer

Articles

• Gapped Collective Charge Excitations and Interlayer Hopping in Cuprate Superconductors
  M. Hepting, M. Bejas, A. Nag, H. Yamase, N. Coppola, D. Betto, C. Falter, M. Garcia-Fernandez, S. Agrestini, Ke-Jin Zhou, M. Minola, C. Sacco, L. Maritato, P. Orgiani, H.I. Wei, K.M. Shen, D.G. Schlom, A. Galdi, A. Greco, and B. Keimer
  Phys. Rev. Lett. 129, 047001 (2022)
  with Supplemental Material
• Nonlocal Electron-Phonon Interaction as a Source of Dynamic Charge Stripes in the Cuprates
  Thomas Bauer und Claus Falter
  Advances in Condensed Matter Physics, Vol. 2012, 313947 (2012)
• Dynamic charge inhomogeneity in cuprate superconductors
  Thomas Bauer and Claus Falter
  J. Physics: Condens. Matter 22, 142201 (2010)
• Erratum
  J. Phys.: Condens. Matter 22, 149802 (2010)
• Phonon dispersion and anomalies in one-layer high-temperature superconductors
  Thomas Bauer and Claus Falter
  J. Physics: Condens. Matter 22, 055404 (2010)
• Impact of dynamical screening on the phonon dynamics of metallic La₂CuO₄
  Thomas Bauer and Claus Falter
  Phys. Rev. B 80, 094525 (2009)
• The phonon dynamics of Sr₂RuO₄: microscopic calculation and comparison with that of La₂CuO₄
  Thomas Bauer and Claus Falter
  J. Physics: Condens. Matter 21, 395701 (2009)
• Microscopic modeling of phonon dynamics and charge response in NdCuO
  Thomas Bauer and Claus Falter
  Phys. Rev. B 77, 144503 (2008)
• Microscopic modeling of phonon dynamics and charge response in metallic BaBiO₃
  C. Falter, Th. Bauer and Th. Trautmann
  Phys. Rev. B 75, 014508 (2007)
• Modeling the electronic state of the high-T_c superconductor LaCuO: Phonon dynamics and charge response
  C. Falter, Th. Bauer and F. Schnetgöke
  Phys. Rev. B 73, 224502 (2006)
• Lattice dynamics, dielectric properties and structural instabilities of SrTiO₃ and BaTiO₃
  Th. Trautmann and C. Falter
  J. Phys.: Condens. Matter 16, 5955 (2004)
• Infrared- and Raman-active modes of Bi-based cuprate superconductors calculated in a microscopic model
  C. Falter and F. Schnetgöke
  J. Phys.: Condens. Matter 15, 8495 (2003)
• Interlayer phonons and c-axis charge response in the high-temperature superconductors
  C. Falter, G.A. Hoffmann and F. Schnetgöke
  J. Phys. Condens. Matter 14, 3239 (2002)
• Influence of ionic charge- and dipole-fluctuations on the lattice dynamics, the dielectric properties and the infrared response of La₂CuO₄
  C. Falter and F. Schnetgöke
  Phys. Rev. B 65, 54510 (2002)
• Nonlocal electron-phonon coupling of ionic charge-fluctuation type and phononanomalies in the high-temperature superconductors
  C. Falter and G.A. Hoffmann
  Phys. Rev. B 64, 54516 (2001)

• Effect of the insulator metal transition on the phonon anomalies in La₂CuO₄
  C. Falter and G.A. Hoffmann
  Phys. Rev. B 61, 14537 (2000)

• Influence of the environment potential on the structural and dynamical properties of ionic crystals
  C. Falter, G.A. Hoffmann and F. Schnetgöke
  J. Phys.: Condens. Matter 12, 2985 (2000)
• Erratum: High-temperature magnetoconductivity of YBa₂Cu₃O_7-δ: Reconsideration of the Maki-Thompson contribution
  Phys. Rev. B 61, 14844 (2000)
• Dipole polarization and charge transfer effects in the lattice dynamics and dielectric properties of ionic crystals
  C. Falter, M. Klenner, G.A. Hoffmann and F. Schnetgöke
  Phys. Rev. B 60, 12051 (1999)
• Anisotropy dependence of the c-axis phonon dispersion in the high-temperature superconductors
  C. Falter, M. Klenner and G.A. Hoffmann
  Phys. Rev. B 57, 14444 (1998)
• Screening and Phonon-Plasmon Scenario as calculated from a realistic electronic bandstructure based on LDA for La₂CuO₄
  C. Falter, M. Klenner and G.A. Hoffmann
  Phys. Stat. Sol. (b) 209, 235 (1998)
• Phonon dispersion of La₂CuO₄ from a tight-binding analysis of the LAPW bandstructure
  C. Falter, M. Klenner, G.A. Hoffmann and F. Schnetgöke
  Z. Phys. B 102, 385 (1997)
• Origin of phonon anomalies in La₂CuO₄
  C. Falter, M. Klenner, G.A. Hoffmann, Q. Chen
  Phys. Rev. B 55, 3308 (1997)
• Raman shifts in Si nanocrystals
  J. Zi, H. Büscher, C. Falter, W. Ludwig, K. Zhang, and X. Xie
  Appl. Phys. Lett. 69, 200 (1996)
• Nonlocal charge transfer effects in the lattice dynamics of ionic crystals
  C. Falter, G.A. Hoffmann and M. Klenner
  Phys. Rev. B 53, 14917 (1996)
• Phonon Renormalization and c-axis phonon-plasmon mixing in La₂CuO₄
  C. Falter, M. Klenner and G.A. Hoffmann
  Phys. Rev. B 52, 3702 (1995)
• Theoretical evidence for c-axis phonon-plasmon coupling in La₂CuO₄
  C. Falter and M. Klenner
  Conference proceedings of the University of Miami Workshop on high temperature superconductivity physical properties and mechanisms, Miami (1995), J. Supercond. 8, 783 (1995)
• Enhanced electron-phonon coupling and phonon-plasmon mixing in the hightemperature superconductors
  C. Falter and M. Kenner
  Conference proceedings of the international Euroconference on magnetic correlations, metal-insulator transitions and superconductivity in novel materials, Würzburg (1994), J. Low Temp. Phys. 99, 513 (1995)
• Nonadiabatic and nonlocal electron-phonon interaction and phonon-plasmon mixing in the high-temperature superconductors
  C. Falter and M. Klenner
  Phys. Rev. B 50, 9426 (1994)
• Calculated phonon dispersion of infinite-layer compounds and the effects of charge fluctuations
  M. Klenner, C. Falter and Q. Chen
  Z. Phys. B 95, 417 (1994)
• Calculated effects of charge fluctuations on the phonon dispersion of YBa₂Cu₃O₆ and YBa₂Cu₃O₇. II. Results
  M. Klenner, C. Falter and Q. Chen
  Ann. der Physik, Vol. 506, Issue 4, 242 (1994)
• Calculated effects of charge fluctuations on the phonon dispersion of YBa₂Cu₃O₆ and YBa₂Cu₃O₇. I. The model
  M. Klenner, C. Falter and Q. Chen
  Ann. der Physik, Vol. 506, Issue 4, 225 (1994)
• Role of  Bonding, Reduced Screening and Structure in the High-Temperature Superconductors
  C. Falter, M. Klenner and Q. Chen
  Phys. Rev. B 48, 16690 (1993)
• Phonon Dispersion Curves of Diamond and Silicon within the Quasi-Ion Model
  M. Mohaupt, C. Falter, M. Klenner and W. Ludwig
  Phys. Stat. Sol. (b), 180, 357 (1993)
• Lattice Dynamics of La₂NiO₄ in the Charge Fluctuation Model
  C. Falter, M. Klenner, Q. Chen and W. Ludwig
  Solid State Communications 88, Issue 1, pp. 87-93 (1993)
• The Effect of Charge-Fluctuations on the Phonon Dispersion and Electron-Phonon Interaction in La₂CuO₄
  C. Falter, M. Klenner, and W. Ludwig
  Phys. Rev. B 47, 5390 (1993)
• Nonlocal Electron-Phonon Interaction Effects in La₂CuO₄
  C. Falter, M. Klenner and W. Ludwig
  Physics Letters A 165, Issue 3, pp. 260-265 (1992)
• Temperature Dependence of Band Gaps in Si and Ge in the Quasi-Ion Model
  M. Klenner, C. Falter and W. Ludwig
  Annalen der Physik, Vol. 504, Issue 1, pp. 34-38 (1992)
• Electron-Phonon Matrix Elements and Deformation Potentials in Silicon and Germanium in the Quasi-Ion Model
  M. Klenner, C. Falter and W. Ludwig
  Annalen der Physik, Vol. 504, Issue 1, pp. 24-33 (1992)
• Approximation of Local-Field Effects in the Dielectric Formalism of Lattice Dynamics
  C. Falter, M. Klenner and W. Ludwig
  Phys. Stat. Sol. (b), 167, 85 (1991)
• A Model for the Long-Range Part of the Phonon-Induced Polarization Density in GaAs
  M. Klenner, C. Falter and W. Ludwig
  Solid State Communications 75, 687-688 (1990)
• Construction of the Crystal Potential from the Quasi-Ion Approach
  C. Falter, H. Rakel, M. Klenner and W. Ludwig
  Phys. Rev. B 40, 7727 (1989)
• A Microscopic Calculation of Force Constants in Crystals
  H. Rakel, C. Falter and W. Ludwig
  Zeitschrift für Physik B, Condensed Matter, 75, pp. 179-186 (1989)
• A Double Bond Charge Model for Si
  M. Klenner, C. Falter and W. Ludwig
  Phys. Stat. Sol. (b), 151, 503 (1989)
• Covalent and Metallic Bonding within the Quasi-Ion Approach
  C. Falter, H. Rakel and W. Ludwig
  Phys. Rev. B 38, 3986 (1989)
• Partial Density Approach to Lattice Dynamics of Metals
  H. Rakel, C. Falter and W. Ludwig
  J. Phys. F: Met. Phys. 18, 2181 (1988)
• A Quasi-Ion Approach to Lattice Dynamics and Electron-Phonon Interaction with Applications
  C. Falter, W. Ludwig, M. Selmke and W.E. Pickett
  J. Phys. C: Solid State Phys. 20, 501 (1987)
• A Microscopic Model for the Phonon Dispersion in Silicon
  C. Falter, W. Ludwig and M. Selmke
  Solid State Communications 54, Issue 6, 497-499 (1985)
• Charge-Transfer and Chemical-Shifts in Zinc-Blende Compounds
  C. Falter, W. Ludwig and M. Selmke
  Solid State Communication 54, Issue 4, pp. 321-325 (1985)
• Calculation of Core-Level-Shifts from an Alternative Ionicity Scale
  C. Falter, M. Selmke and W. Ludwig
  Solid State Communications 52, Issue 12, pp. 949-951 (1984)
• Charge Densities and Quasi-Ions in Lattice Dynamics
  C. Falter, M. Selmke, W. Ludwig and K. Kunc
  Phys. Rev. B 32, 6518 (1985)
• An Alternative Definition of Ionicity on a Microscopic Scale
  C. Falter, M. Selmke, W. Ludwig, and W. Zierau
  Phys. Letters 105A, 139 (1984)
• Valence Charge Density and Effective Charges within the Density Response Theory
  C. Falter, W. Ludwig, A.A. Maradudin, M. Selmke and W. Zierau
  Phys. Rev. B 32, 6510 (1985)
• Surface Phonons and Reconstruction of a Silicon Surface
  W. Goldammer, W. Ludwig, W. Zierau and C. Falter
  Surface Science 141, 139 (1984)
• A Symmetry Conserving Orthonormalization Method
  M. Selmke, C. Falter and W. Ludwig
  J. Phys. C: Solid State Phys. 17, 6649 (1984)
• Renormalized Density Response and Lattice Dynamics of Si
  C. Falter, M. Selmke, W. Ludwig and W. Zierau
  J. Phys. C: Solid State Phys. 17, 21 (1984)
• A Model Case Study of the LA 2/3 (1,1,1)-Anomaly in BCC-Structure
  C. Falter, W. Ludwig, W. Zierau and M. Selmke
  Phys. Lett. 93A, 298 (1983)
• The Influence of Electronic Structure on Force Constants and Phonon-Renormalization
  C. Falter, W. Ludwig, M. Selmke and W. Zierau
  Solid State Communications 44, Issue 2, pp. 123-128 (1982)
• The LA 2/3 (1,1,1)-Anomaly in BCC-Structure
  C. Falter, W. Ludwig, M. Selmke, and W. Zierau
  Phys. Lett. 90A, 250, (1982)
• On the Microscopic Theory of Phononanomalies and its Relation to T_C
  C. Falter, W. Ludwig and M. Selmke
  Phys. Lett. 85A, 285 (1981)
• Renormalization of the Dielectric Response with Applicatins to Effective Ion Interaction and Phonons
  C. Falter and M. Selmke
  Phys. Rev. B 24, 586 (1981)
• Renormalization of the Dielectric Function and its Applications
  C. Falter, W. Ludwig and M. Selmke
  Phys. Lett. 82A, 195 (1981)
• Effective Ion Interaction and Force Constants in Defect Crystals
  C. Falter and M. Selmke
  Phys. Rev. B 21, 2078 (1980)
• Summation of Coulombic Interactions in a Gaussian Basis
  C. Falter, M. Selmke and W. Zierau
  Phys. Lett. 77A, 65 (1980)
• Density Response and Local Field Effect in the Tight Binding Limit
  C. Falter and M. Selmke
  Solid State Communications 33, Issue 6, pp. 667-669 (1980)
• Determination of the High-Temperature Bulk Modulus from Self-Diffusion Experiments Demonstrated for Tungsten
  C. Falter and W. Zierau
  J. Appl. Phys. 51, 2070 (1980)
• Activation Volume for Self-Diffusion and for the Diffusion of Impurities in Lead
  C. Falter, W. Zierau and P. Varotsos
  J. Appl. Phys. 50, 5764 (1979)
• On a New Analysis of the Diffusion Data in Sodium Under Pressure
  P. Varotsos, W. Ludwig and C. Falter
  J. Phys. C: Solid State Phys. 11, L311 (1978)
• On the Energy of Formation of Defects
  C. Falter, W. Zierau and P. Varotsos
  Solid State Communications 27, Issue 4, pp. 401-404
• Approximate Inversion of the Dielectric Matrix
  H. Viefhues, C. Falter, W. Ludwig, M. Monkenbusch, M. Selmke and W. Zierau
  Phys. Lett. 66A, 404 (1978)
• A Direct Approach to the Density Response in Lattice Dynamics
  C. Falter
  Solid State Communications 25, Issue 9, pp. 685-688
• Phonon Dispersion and Symmetry of Solid-J₂
  C. Falter
  Z. Physik 258, 263-276 (1973)
• Symmetry-Relations and Dynamics of Molecular Crystals in the Long Wave Limit
  C. Falter and W. Ludwig
  Z. Physik 242, 276-286 (1971)