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Project B5 |
| Title: | Optical signatures from excitons, bi-excitons, polaron-excitons and collective excitonic phases in strongly correlated electron-hole systems |
| Project leader: | Prof. Dr. Holger Fehske (Greifswald) |
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| Abstract: |
The project addresses the appearance and nature of exciton bound
states and the potential development of collective excitonic phases
in novel semiconductor matrials. To this end, we discuss the optical,
transport and thermodynamic properties of the exciton system,
being influenced by band structure, electron correlation, and
electron-phonon coupling effects. In addition, we study the interaction
with external (radiation) fields. Most notably, we critically examine
recent experimental findings regarding the exciton-polariton
entanglement, the existence of exciton-molecules, or the formation of an
excitonic insulator state.
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| Publications:
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| 2013 | -
Anderson localization versus charge-density-wave formation in disordered electron systems Nishimoto S., Ejima S., Fehske H.
Phys. Rev. B 87:045116, 2013
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Equilibration and thermalization of the dissipative quantum harmonic oscillator in a nonthermal environment Pagel D., Alvermann A., Fehske H.
Phys. Rev. E 87:012127, 2013
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| 2012 | -
Collapse-revival dynamics and atom-field entanglement in the nonresonant Dicke model Alvermann A., Bakemeier L., Fehske H.
Phys. Rev. A 85:043803, 2012
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Numerical time propagation of quantum systems in radiation fields Alvermann A., Fehske H., Littlewood P. B.
New Journal of Physics 14:105008, 2012
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Quantum phase transition in the Dicke model with critical and noncritical entanglement Bakemeier L., Alvermann A., Fehske H.
Phys. Rev. A 85:043821, 2012
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Discrete symmetry breaking transitions between paired superfluids Bhaseen M. J., Ejima S., Essler F. H. L., Fehske H., Hohenadler M., Simons B. D.
Phys. Rev. A 85:033636, 2012
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Characterization of Mott-insulating and superfluid phases in the one-dimensional Bose-Hubbard model Ejima S., Fehske H., Gebhard F., zu Münster K., Knap M., Arrigoni E., von der Linden W.
Phys. Rev. A 85:053644, 2012
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Phase separation in the Edwards model Ejima S., Sykora S., Becker K. W., Fehske H.
Phys. Rev. B 86:155149, 2012
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Metal-insulator transition in the Edwards model Fehske H., Ejima S., Wellein G., Bishop A. R.
Journal of Physics: Conference Series 391:012152, 2012
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Strongly entangled light from planar microcavities Pagel D., Fehske H., Sperling J., Vogel W.
Phys. Rev. A 86, Nr.: 052313, 2012
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Coulomb interaction effects in graphene bilayers: electron-hole pairing and plasmaron formation Phan N. V., Fehske H.
New Journal of Physics 14:075007, 2012
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Condensation of excitons in Cu2O at ultracold temperatures: experiment and theory Stolz H., Schwartz R., Kieseling F., Som S., Kaupsch M., Sobkowiak S., Semkat D., Naka N., Koch T., Fehske H.
New Journal of Physics 14:105007, 2012
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Electron-hole pair condensation at the semimetal-semiconductor transition: A BCS-BEC crossover scenario Zenker B., Ihle. D., Bronold F.X., Fehske H.
Phys. Rev. B 85:121102R , 2012
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| 2011 | -
High-order commutator-free exponential time-propagation of driven quantum systems Alvermann A., Fehske H.
J. Comp. Phys. 230:5930, 2011
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Variational discrete variable representation for excitons on a lattice Alvermann A., Littlewood P. B., Fehske H.
Phys. Rev. B 84:035126, 2011
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Aharonov-Bohm interference for a hole in a two-dimensional Ising antiferromagnet in a transverse magnetic field Berciu M., Fehske H.
Phys. Rev. B 84:165104, 2011
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Magnetic properties of the second Mott lobe in pairing Hamiltonians Bhaseen M. J., Ejima S., Hohenadler M., A. O. Silver, Essler F. H. L., Fehske H., Simons B. D.
Phys. Rev. A 84:023635, 2011
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Ising Deconfinement Transition between Feshbach-Resonant Superfluids Ejima S., Bhaseen M. J., Hohenadler M., Essler F. H. L., Fehske H., Simons B. D.
Phys. Rev. Lett. 106:015303, 2011
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Dynamic properties of the one-dimensional Bose-Hubbard model Ejima S., Fehske H., F. Gebhard
Europhysics Letters 93:30002 , 2011
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Nonequilibrium transport through molecular junctions in the quantum regime Koch T., Loos J., Alvermann A., Fehske H.
Phys. Rev. B 84:125131, 2011
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Excitonic resonances in the 2D extended Falicov-Kimball model Phan N. V., Fehske H., Becker K. W.
Europhysics Letters 95:17006, 2011
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Phase separation of multicomponent excitonic Bose-Einstein condensates Sobkowiak S., Semkat D., Stolz H., Koch T., Fehske H.
phys. stat. sol. (c) 8:1178 , 2011
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Slave-field fluctuation approach to the extended Falicov-Kimball model: charge, orbital, and excitonic susceptibilities Zenker B., Ihle. D., Bronold F.X., Fehske H.
Phys. Rev. B 83:235123, 2011
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| 2010 | -
Non-equilibrium current and electron pumping in nanostructures Alvermann A., Fehske H.
Journal of Physics: Conference Series 200:012005, 2010
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Analytical calculation of the Green's function and Drude weight for a correlated fermion-boson system Alvermann A., Edwards D., Fehske H.
Journal of Physics: Conference Series 220:012023, 2010
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Momentum Average approximation for models with boson-modulated hopping: Role of closed loops in the dynamical generation of a finite quasiparticle mass Berciu M., Fehske H.
Phys. Rev. B 82:085116, 2010
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A Green's function decoupling scheme for the Edwards fermion-boson model Edwards D., Ejima S., Alvermann A., Fehske H.
J. Phys.: Cond. Matter 22:435601, 2010
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DMRG analysis of the SDW-CDW crossover region in the 1D half-filled Hubbard-Holstein model Ejima S., Fehske H.
Journal of Physics: Conference Series 200:012031, 2010
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Luttinger, Peierls or Mott? Quantum Phase Transitions in Strongly Correlated 1D Electron-Phonon Systems Fehske H., Hager G.
Springer Series in Material Sciences 132:1-22, 2010
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Transport through a vibrating quantum dot: Polaronic effects Koch T., Loos J., Alvermann A., Bishop A. R., Fehske H.
Journal of Physics: Conference Series 220:012014, 2010
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Spectral signatures of the excitonic insulator in the extended Falicov-Kimball model Phan N. V., Becker K. W., Fehske H.
Phys. Rev. B 81:205117, 2010
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Interacting multicomponent exciton gases in a potential trap: Phase separation and Bose-Einstein condensation Sobkowiak S., Semkat D., Stolz H., Koch T., Fehske H.
Phys. Rev. B 82:064505, 2010
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Interacting multicomponent exciton gases in a potential trap: Phase separation and Bose-Einstein condensation Sobkowiak S., Semkat D., Stolz H., Koch T., Fehske H.
Phys. Rev. B 82:064505, 2010
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Charge-density-wave formation in a two-channel fermion-boson transport model: A projective renormalization approach Sykora S., Becker K. W., Fehske H.
Phys. Rev. B 81:195127, 2010
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Existence of the excitonic insulator phase in the extended Falicov-Kimball model: SO(2)-invariant slave-boson approach Zenker B., Bronold F.X., Ihle. D., Fehske H.
Phys. Rev. B 81:115122, 2010
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Competing chiral and multipolar electric phases in the extended Falicov-Kimball model Zenker B., Fehske H., C. D. Batista
Phys. Rev. B 82:165110, 2010
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| 2009 | -
Sparse polynomial space approach to dissipative quantum systems: Application to the sub-ohmic spin-boson model Alvermann A., Fehske H.
Phys. Rev. Lett. 102:150601, 2009
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Quantum phase transition in a 1D transport model with boson affected hopping: Luttinger liquid versus charge-density-wave behavior Ejima S., Hager G., Fehske H.
Phys. Rev. Lett. 102:106404, 2009
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Luttinger parameters and momentum distribution function for the half-filled spinless fermion Holstein model: A DMRG approach Ejima S., Fehske H.
Europhysics Letters 89:27001, 2009
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Quantum Transport Affected by a Background Medium: Fluctuations versus Correlations Ejima S., Fehske H.
Phys. Rev. B 80:155101, 2009
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Numerical approaches to time evolution of complex quantum systems Fehske H., Wellein G., Schleede J., Filinov V., Schubert G., Bishop A. R.
Phys. Lett. A 373:2182, 2009
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Phonon affected transport through molecular quantum dots Loos J., Bishop A. R., Koch T., Fehske H., Alvermann A.
J. Phys.: Cond. Matter 21:395601, 2009
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Localization-delocalization transition of a polaron near an impurity Mishchenko A.S., De Filippis G., Nagaosa N., Cataudella V., Alvermann A., Sushkov O. P., Fehske H.
Phys. Rev. B 79:180301 (R), 2009
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| 2008 | -
Solution of the polaron anisotropy problem Alvermann A., Fehske H., S. A. Trugman
Phys. Rev. B 78:165106, 2008
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On the possibility of excitonic phases at the semiconductor-semimetal transition Bronold F.X., Fehske H.
Superlattices and Microstructures 43:512, 2008
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Exact Treatment of Exciton-Polaron Formation by Diagrammatic Monte Carlo Simulations Burovski E., Fehske H., Mishchenko A.S.
Phys. Rev. Lett. 101:116403, 2008
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Computational Many-Particle Physics Fehske H., R. Schneider, Weiße A. (Eds.)
Lecture Notes in Physics, Band 739, Springer Berlin Heidelberg New York, ISBN: 978-3-540-74685-0 (2008) Lecture Notes - Wilhelm and Else Heraeus Summer School 2006
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Localized polarons and doorway vibrons in finite quantum structures Fehske H., Loos J., Wellein G., Bishop A. R.
Phys. Rev. B 77:085117, 2008
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Metallicity in the half-filled Holstein-Hubbard model Fehske H., Hager G., Jeckelmann E.
Europhysics Letters 84:57001, 2008
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Bound state formation and the nature of the excitonic insulator phase in the extended Falicov-Kimball model Ihle. D., Pfafferott M., Burovski E., Bronold F.X., Fehske H.
Phys. Rev. B 78:193103, 2008
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Correlation-Induced Metal Insulator Transition in a Two-Channel Fermion-Boson Model Wellein G., Fehske H., Alvermann A., Edwards D.
Phys. Rev. Lett. 101:136402, 2008
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| 2007 | -
Boson controlled quantum transport Alvermann A., Edwards D., Fehske H.
Phys. Rev. Lett. 98, Nr.: 056602, 2007
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Excitonic versus electron-hole liquid phases in Tm[Se,Te] compounds Bronold F.X., Fehske H., Röpke G.
J. Phys. Soc. Japan, Suppl. A 76:27, 2007
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Correlation effects in partially ionized asymmetric electron-hole plasmas Filinov V., Fehske H., Bonitz M., Fortov V.E., Levashov P.
Phys. Rev. E 75:036401, 2007
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Lattice exciton-polaron problem by quantum Monte Carlo simulations Hohenadler M., Littlewood P. B., Fehske H.
Phys. Rev. B 76:184303, 2007
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| 2006 | -
Possibility of an excitonic insulator at the semiconductor-semimetal transition Bronold F.X., Fehske H.
Phys. Rev. B 74, Nr.: 165107, 2006
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Phase diagram of the excitonic insulator Hülsen B., Bronold F.X., Fehske H., Yonemitsu K.
Physica B 378:267-268, 2006
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The kernel polynomial method Weiße A., Wellein G., Alvermann A., Fehske H.
Rev. Mod. Phys. 78:275-306, 2006
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| 2005 | -
Exciton formation and dissociation in mass-asymmetric electron-hole plasmas Fehske H., Filinov V., Bonitz M., Fortov V.E., Levashov P.
Journal of Physics: Conference Series 11:139-146, 2005
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Article online