Unconventional London penetration depth in Ba(Fe0.93Co0.07)2As2 single crystals (2008)
Gordon, R. T., Ni, N., Martin, C., Tanatar, M. A., Vannette, M. D., Kim, H., ...
The London penetration depth, $\lambda(T)$, has been measured in several single crystals of Ba(Fe$_{0.93}$Co$_{0.07}$)$_2$As$_2$. Thermodynamic, electromagnetic, and structural characterization...
Kondo, Takeshi, Santander-Syro, A. F., Copie, O., Liu, Chang, Tillman, M. E., Mun, E. D., ...
We use angle resolved photoemission spectroscopy (ARPES) to study the momentum dependence of the superconducting gap in NdFeAsO1-xFx single crystals. We find that the Gamma hole pocket is fully...
Martin, C., Gordon, R. T., Tanatar, M. A., Vannette, M. D., Tillman, M. E., Mun, E. D., ...
In- and out-of- plane magnetic penetration depth was studied in single crystals of NdFeAsO$_{0.9}$F$_{0.1}$. The low temperature behavior of the in-plane London penetration depth, $\lambda_{ab} (T)$,...
^{7}Li NMR Study of Heavy Fermion LiV2O4 Containing Magnetic Defects (2008)
Zong, X., Das, S., Borsa, F., Vannette, M. D., Prozorov, R., Schmalian, J., ...
We present a systematic study of the variations of the ^{7}Li NMR properties versus magnetic defect concentration up to 0.83 mol% within the spinel structure of polycrystalline powder samples and a...
Emergent Symmetry and Dimensional Reduction at a Quantum Critical Point (2007)
We show that the spatial dimensionality of the quantum critical point associated with Bose--Einstein condensation at T=0 is reduced when the underlying lattice comprises a set of layers coupled by a...
Gutzwiller density functional theory for correlated electron systems (2007)
Ho, K. M., Schmalian, J., Wang, C. Z.
We develop a new density functional theory (DFT) and formalism for correlated electron systems by taking as reference an interacting electron system that has a ground state wavefunction which obeys...
Vannette, M. D., Safa-Sefat, A., Jia, S., Law, S. A., Lapertot, G., Bud'ko, S. L., ...
Dynamic magnetic susceptibility, $\chi$, was studied in several intermetallic materials exhibiting ferromagnetic, antiferromagnetic and metamagnetic transitions. Precise measurements by using a 14...
Coexistence of superconductivity and incoherence in quasi 1D chains (2006)
Khasanov, R., Kondo, T., Schmalian, J., Kazakov, S. M., Zhigadlo, N. D., Karpinski, J., ...
The dimensionality of a correlated many-body system has a large impact on its electronic properties. When electrons are confined to one-dimensional chains of atoms their behavior is very different...
Geometric Frustration and Dimensional Reduction at a Quantum Critical Point (2006)
Batista, C. D., Schmalian, J., Kawashima, N., Sengupta, P., Sebastian, S. E., Harrison, N., ...
We show that the spatial dimensionality of the quantum critical point associated with Bose--Einstein condensation at T=0 is reduced when the underlying lattice comprises a set of layers coupled by a...
Quantum critical end point of the Kondo volume collapse (2006)
Dzero, M., Norman, M. R., Paul, I., Pepin, C., Schmalian, J.
The Kondo volume collapse describes valence transitions in f-electron metals, and is characterized by a line of first order transitions in the pressure-temperature phase plane terminated at critical...
Towards a complete theory of high T-c (2006)
Zaanen, J., Chakravarty, S., Senthil, T., Anderson, P., Lee, P., Schmalian, J., ...
Towards a complete theory of high T-c (2006)
Zaanen, J., Chakravarty, S., Senthil, T., Anderson, P., Lee, P., Schmalian, J., ...
Johnston, D. C., Zong, X., Borsa, F., Schmalian, J., Kondo, S.
7Li NMR measurements on LiV2O4 from 0.5 to 4.2 K are reported. A small concentration of magnetic defects within the structure drastically changes the 7Li nuclear magnetization relaxation versus time...
Millis, A. J., Morr, D. K., Schmalian, J.
In a recent paper Castro-Neto and Jones argue that because the observability of quantum Griffiths-McCoy effects in metals is controlled by non-universal quantities, the quantum Griffiths-McCoy...
Scaling in the Emergent Behavior of Heavy Electron Materials (2004)
Curro, N. J., Schmalian, J., Pines, D.
We show that the NMR Knight shift anomaly exhibited by a large number of heavy electron materials can be understood in terms of the different hyperfine couplings of probe nuclei to localized spins...
On quantum Griffiths effects in metallic systems (2002)
Millis, A. J., Morr, D., Schmalian, J.
Elementary analytical extremal statistics arguments are used to analyse the possibility of quantum Griffiths effects in nearly critical systems with overdamped dynamics, such as arise in conventional...
The neutron resonance in the cuprates and its effect on fermionic excitations (2001)
Abanov, Ar., Chubukov, A. V., Eschrig, M., Norman, M. R., Schmalian, J.
We argue that the exciton scenario for the magnetic resonance in the cuprate superconductors yields a small spectral weight of the resonance, in agreement with experiment. We show that the small...
Abanov, Ar., Chubukov, Andrey V., Schmalian, J.
We present the full analysis of the normal state of the spin-fermion model near the antiferromagnetic instability in two dimensions. This model describes low-energy fermions interacting with their...
Local Defect in Metallic Quantum Critical Systems (2001)
Millis, A. J., Morr, D. K., Schmalian, J.
We present a theory of a single point, line or plane defect coupling to the square of the order parameter in a metallic system near a quantum critical point at or above its upper critical dimension....
A neutron study of magnetic domain correlations in antiferromagnetically coupled multilayers (2000)
Langridge, S, Schmalian, J, Marrows, C H, Dekadjevi, D T, Hickey, B J
Morr, D K, Schmalian, J, Pines, D
In this communication we consider the doping dependence of the strong antiferromagnetic l fluctuations in the cuprate superconductors. We will show that the nuclear magnetic resonance (NMR) and...
Magnetic fluctuations in coupled inequivalent Hubbard layers as a model for Y2Ba4Cu7O15 (1998)
Hildebrand, G., Arrigoni, E., Schmalian, J., Hanke, W.
We investigate, within the fluctuation-exchange approximation, a correlated-electron model for Y2Ba4Cu7O15 represented by two inequivalent Hubbard layers coupled by an interlayer hopping $t_\perp$....
Interplane magnetic coupling effects in the multilattice compound Y_2Ba_4Cu_7O_{15} (1998)
Hildebrand, G., Arrigoni, E., Schmalian, J., Hanke, W.
We investigate the interplane magnetic coupling of the multilattice compound Y_2Ba_4Cu_7O_{15} by means of a bilayer Hubbard model with inequivalent planes. We evaluate the spin response, effective...
Influence of Electron-Phonon Interaction on Spin Fluctuation Induced Superconductivity (1998)
Nunner, T. S., Schmalian, J., Bennemann, K. H.
We investigate the interplay of the electron-phonon and the spin fluctuation interaction for the superconducting state of YBa$_2$Cu$_3$O$_{7}$. The spin fluctuations are described within the nearly...
Effects of Electronic Correlations on the Thermoelectric Power of the Cuprates (1997)
Hildebrand, G., Hagenaars, T. J., Hanke, W., Grabowski, S., Schmalian, J.
We show that important anomalous features of the normal-state thermoelectric power S of high-Tc materials can be understood as being caused by doping dependent short-range antiferromagnetic...
Grabowski, S., Schmalian, J., Bennemann, K. H.
The normal and superconducting state of YBa_{2}Cu_{3}O_{6+\delta} and Bi_{2}Sr_{2}CaCu_{2}O_{8+\delta} are investigated by using the mono- and bilayer Hubbard model within the fluctuation exchange...
Dynamical Mean Field Theory for Perovskites (1996)
Lombardo, P., Schmalian, J., Avignon, M.
Using the Hubbard Hamiltonian for transition metal-3d and oxygen-2p states with perovskite geometry, we present a dynamical mean field theory which becomes exactin the limit of large coordination...
Schmalian, J., Langer, M., Grabowski, S., Bennemann, K. H.
Using the fluctuation exchange approximation of the one band Hubbard model, we discuss the origin of the changing Fermi surface volume in underdoped cuprate systems due to the transfer of occupied...
Electronic Theory for Bilayer-Effects in High-T_c Superconductors (1996)
Grabowski, S., Schmalian, J., Langer, M., Bennemann, K. H.
The normal and the superconducting state of two coupled CuO_2 layers in the High-T_c superconductors are investigated by using the bilayer Hubbard model, the FLEX approximation on the real frequency...
Langer, M., Schmalian, J., Grabowski, S., Bennemann, K. H.
We analyze the doping dependence of the intensity and energetical position of shadow states in high -T$_{c}$ superconductors within the 2D Hubbard model and using our recently developed numerical...
A new approach for perovskites in large dimensions (1995)
Schmalian, J., Lombardo, P., Avignon, M.
Using the Hubbard Hamiltonian for transition metal-3d and oxygen-2p states with perovskite geometry, we propose a new scaling procedure for a nontrivial extension of these systems to large spatial...
Grabowski, S., Langer, M., Schmalian, J., Bennemann, K. H.
The superconducting phase of the 2D one-band Hubbard model is studied within the FLEX approximation and by using an Eliashberg theory. We investigate the doping dependence of $T_c$, of the gap...
Langer, M., Schmalian, J., Grabowski, S., Bennemann, K. H.
We analyze the breakdown of Fermi-liquid behavior within the 2D Hubbard model as function of doping using our recently developed numerical method for the self consistent summation of bubble and...
Nonlinear Magneto-Optical Response of $s$- and $d$-Wave Superconductors (1995)
The nonlinear magneto-optical response of $s$- and $d$-wave superconductors is discussed. We carry out the symmetry analysis of the nonlinear magneto-optical susceptibility in the superconducting...
Grabowski, S., Schmalian, J., Langer, M., Bennemann, K. H.
The doping dependence of the superconducting state for the 2D one-band Hubbard Hamiltonian is determined. By using an Eliashberg-type theory, we find that the gap function $\Delta_{\bf k}$ has a...
Langer, M., Schmalian, J., Grabowski, S., Bennemann, K. H.
Using a new method for the solution of the FLEX-equations, which allows the determination of the self energy $\Sigma_{\bf k}(\omega)$ of the $2D$ Hubbard model on the real frequency axis, we...