Effective spin-fermion model for strongly correlated electrons [PDF]
EPL, 109 (2015) 37003, 2015 A modified spin-fermion model is proposed to describe the physics of the underdoped phase of the t-J model of strongly correlated ...
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Strings in strongly correlated electron systems [PDF]
AnnalenPhys.17:441-449,1997, 2007 It is shown that strongly correlated electrons on frustrated lattices like pyrochlore, checkerboard or kagome lattice can lead to the appearance of closed and open strings. They are resulting from nonlocal subsidiary conditions which propagating strongly correlated electrons require.
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Nature Physics, vol. 6, 931-933, (2010), 2010 Precisely what are the electrons in a high-temperature superconductor doing before they superconduct? Strong electronic correlations may give rise to composite rather than fractionalized excitations, as is typical in other strongly coupled systems such as quark matter.
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Density-matrix renormalization group methods for momentum- and frequency-resolved dynamical correlation functions [PDF]
Prog. Theor. Phys. Suppl. 176 (2008) pp. 143-164, 2008 Several density-matrix renormalization group methods have been proposed to compute the momentum- and frequency-resolved dynamical correlation functions of low-dimensional strongly correlated systems. The most relevant approaches are discussed in this contribution.
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Whither Correlated Electron Theory? [PDF]
, 2001 This is the text of the 'Theory' opening talk at the 2001 Strongly Correlated Electron Systems conference. It contains opinions about some of the outstanding scientific challenges facing the theory side of the correlated electrons field.
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Correlations in one-dimensional disordered electronic systems with interaction [PDF]
Phy. Rev. B55 R7295 (1997), 1996 We investigate the effects of randomness in a strongly correlated electron model in one-dimension at half-filling. The ground state correlation functions are exactly written by products of 3$\times$3 transfer matrices and are evaluated numerically. The correlation lengths depend on randomness when the interaction is effectively weak.
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Comment on "Z2-slave-spin theory for strongly correlated fermions" + Reply to the Reply to the "Comment on ?Z2-slave-spin theory for strongly correlated" fermions? [PDF]
, 2013 We discusss the results published by Ruegg et al in PRB 81, 155118 (2010).
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Exciton formation in strongly correlated electron-hole systems near the semimetal-semiconductor transition [PDF]
Journal of Physics: Conference Series 529, 012030 (2014), 2014 The region surrounding the excitonic insulator phase is a three-component plasma composed of electrons, holes, and excitons. Due to the extended nature of the excitons, their presence influences the surrounding electrons and holes. We analyze this correlation.
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Metal-insulator transitions and the effects of electron-electron interactions in two-dimensional electron systems [PDF]
Physics-Uspekhi 48, 129 (2005), 2004 Experimental results on the metal-insulator transitions and the anomalous properties of strongly interacting two-dimensional electron systems are reviewed and critically analyzed. Special attention is given to recent results for the strongly enhanced spin susceptibility and effective mass in low-disordered silicon MOSFETs.
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Note on the exponent puzzle of the Anderson-Mott transition [PDF]
arXiv, 2007 The exponent puzzle of the Anderson-Mott transition is discussed on the basis of a duality model for strongly correlated electrons.
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