Gerd Bergmann

Tenure Track Appointments

• Professor, University of Southern California, 01/02/1986 – 10/08/2008

Summary Statement of Research Interests

Dr. Bergmann works in the area of solid state physics. He investigates the properties of nanostructures, ferromagnetic nanotubes, the pseudo-spin and magnetic moment in graphene, develops theoretical models for tunneling between topological insulators and ferromagnetic film. Furthermore he investigates theoretically ground state of the Kondo effect. Recently his research included the bound state between a magnetic monopoles and its anti-particle, and the question whether a particle with negative mass violates the generalized second law of thermodynamics for black holes.

Research Specialties

Kondo effect,
graphene,
coherence effects,
nanotubes,
spin-mometum locking in topological insulators

Conference Presentations

• Numerical Calculation of the Kondo Cloud , March meeting of APS 2008Talk/Oral Presentation, American Physical Society, New Orleans, 2007-2008
• The Friedel-Anderson Impurity with Orbital Degeneracy , March meeting of APS, 2008Poster, American Physical Society, New Orleans, 2007-2008

Other Presentations

• The Mysterious Beauty of the Kondo Effect, seminar, , 2008-2009
• The Mysterious Beauty of the Kondo Effect , colloquium, , 2008-2009

Book Chapters

• Bergmann, G. (2012). A Compact Treatment of Singular Impurities Using the Artificial Friedel Resonance (FAIR) Method. (Vol. 25) pp. 609. J. Supercond. Nov. Magn..
• Bergmann, G. (2010). Weak Localization and Its Applications as an Experimental Tool. 50 Years Anderson Localization pp. p 231. World Scientific.

Journal Article

• Bergmann, G.Constructive Interference of Two Singlet States in the Kondo Ground-state.
• Bergmann, G. (2018). Magnetic Monopoles predicted by Grand Unified Theories, Violate the Generalized Second Law of Thermodynamics. Nature.
• Bergmann, G. (2018). Magnetic Field Protected Circular Currents in Disordered NanoRings. European Journal of physics.
• Bergmann, G.Dual Interpretation of the Pseudo-Spin of Electrons in Graphene.
• Bergmann, G., Thompson, R., Lu, J. G. (2015). Quantum Theory of Spin Alignment in a Circular Magnetic Nanotube. European Physical Journal B.
• Bergmann, G., Thompson, R., Lu, J. G. (2015). Inertial spin alignment in a circular magnetic nanotube. Physics Letters A.
• Bergmann, G. (2014). The Inner Life of the Kondo Ground State: An Answer to Kenneth Wilson’s Question. arxiv.
• Bergmann, G. (2013). Phase Shift of the asymmetric Friedel-Anderson Impurity. J. Low Temp. Phys.. Vol. 171, pp. 120.
• Tao, Y., Bergmann, G. (2012). Friedel Oscillation about a Friedel-Anderson Impurity. Eur. Phys. J. B. Vol. 85, pp. 42.
• Bergmann, G., Thompson, R. S. (2011). Numerical Calculation of the Fidelity for the Kondo and the Friedel-Anderson Impurities. Eur. Phys. J. B. Vol. 84, pp. 273.
• Bergmann, G., Tao, Y. (2011). Friedel Oscillation about a Friedel-Anderson Impurity. Eur. Phys. J. B.
• Bergmann, G., Thompson, R., Zhang, L. (2010). Friedel-Artificially-Inserted-Resonance Magnetic Solution to the Multi-Channel Friedel-Anderson Problem. Phys. Rev. B. Vol. 82, pp. 115119.
• Bergmann, G. (2010). Delta-Interference of Two Friedel Resonances. Eur. Phys. J. B.
• Bergmann, G. (2009). Friedel oscillations of Kondo impurities: A comparison. Phys. Rev. B. Vol. 78, pp. 195124. PubMed Web Address
• Tateishi, G., Bergmann, G. (2009). Nickel on Lead, Magnetically Dead or Alive?. Eur. Phys. J. B. PubMed Web Address
• Bergmann, G., Tao, Y. (2009). Oscillations of the magnetic polarization in a Kondo impurity at finite magnetic fields. Eur. Phys. J. B. Vol. 73, pp. 95.
• Bergmann, G. (2008). Quantitative Calculation of the Spatial Extension of the Kondo Cloud. Phys.Rev. B. Vol. 77, pp. 104401.
• Bergmann, G. (2007). Electron-Phonon Mass Enhancement in Multi-Layers. Phys.Rev. B. Vol. 75, pp. 195427.

• Physics Prize of the Academy of Goettingen, 1979-1980