Yushankhai, V., Takimoto, T., Thalmeier, P.
Low frequency spin fluctuation dynamics in paramagnetic spinel LiV$_2$O$_4$, a rare 3$d$-electron heavy fermion system, is investigated. A parametrized self-consistent renormalization (SCR) theory of...
Feedback spin resonance in superconducting CeCu$_2$Si$_2$ and CeCoIn$_5$ (2008)
Eremin, I., Zwicknagl, G., Thalmeier, P., Fulde, P.
We show that the recently observed spin resonance modes in heavy-fermion superconductors CeCoIn$_5$ and CeCu$_2$Si$_2$ are magnetic excitons originating from superconducting quasiparticles. The wave...
Self-consistent renormalization theory of spin fluctuations in paramagnetic spinel LiV2O4 (2008)
Yushankhai, V., Thalmeier, P., Takimoto, T.
A phenomenological description for the dynamical spin susceptibility $\chi({\bf q},\omega;T)$ observed in inelastic neutron scattering measurements on powder samples of LiV$_2$O$_4$ is developed in...
Green's function approach to quantum criticality in the anisotropic Kondo-necklace model (2008)
Rezania, H., Langari, A., Thalmeier, P.
We have studied the quantum phase transition between the antiferromagnetic and spin liquid phase for the two dimensional anisotropic Kondo-necklace model. The bond operator formalism has been...
Coexistence of CDW with staggered superconductivity in a ferromagnetic material (2008)
Georgiou, M., Varelogiannis, G., Thalmeier, P.
In usual superconductivity (SC), the pairs have zero total momentum irrespective of their symmetry. Staggered SC would involve, instead, pairs with a finite commensurate total momentum, but such...
Quantum fluctuations in high field magnetization of 2D square lattice J1-J2 antiferromagnets (2007)
Thalmeier, P., Zhitomirsky, M. E., Schmidt, B., Shannon, N.
The J1-J2 square lattice Heisenberg model with spin S=1/2 has three phases with long-range magnetic order and two unconventionally ordered phases depending on the ratio of exchange constants. It...
On the effect of weak disorder on the density of states in graphene (2007)
Dóra, B., Ziegler, K., Thalmeier, P.
The effect of weak potential and bond disorder on the density of states of graphene is studied. By comparing the self-consistent non-crossing approximation on the honeycomb lattice with perturbation...
Magnetocaloric effect in the frustrated square lattice J1-J2 model (2007)
Schmidt, B., Thalmeier, P., Shannon, N.
We investigate the magnetocaloric properties of the two-dimensional frustrated J1-J2 model on a square lattice. This model describes well the magnetic behavior of two classes of quasi-two-dimensional...
Dynamic spin susceptibility of paramagnetic spinel LiV2O4 (2007)
Yushankhai, V., Yaresko, A., Fulde, P., Thalmeier, P.
In an attempt to explain inelastic neutron scattering data for LiV2O4 the dynamical spin susceptibility \chi(Q,w) at zero temperature is calculated. Starting point is a weak coupling approach based...
Field induced quantum phase transition in the anisotropic Kondo necklace model (2006)
The anisotropic Kondo necklace model in 2D and 3D is treated as a genuine model for magnetic to Kondo singlet quantum phase transitions in the heavy fermion (HF) compounds. The variation of the...
Theory of magnetic excitons in the heavy-fermion superconductor $UPd_{2}Al_{3}$ (2006)
Chang, Jun, Eremin, I., Thalmeier, P., Fulde, P.
We analyze the influence of unconventional superconductivity on the magnetic excitations in the heavy fermion compound UPd$_2$Al$_3$. We show that it leads to the formation of a bound state at...
Antiferromagnetic and spin gap phases of the anisotropic Kondo necklace model (2006)
We have studied the effect of anisotropies on the quantum phase transition of the Kondo necklace model in dimensions D=1, 2 and 3. Both the anisotropy $\delta$ of the inter-site interaction term and...
Yushankhai, V., Fulde, P., Thalmeier, P.
To treat effects of electron correlations in geometrically frustrated pyrochlore and checkerboard lattices, an extended single-orbital Hubbard model with nearest neighbor hopping $\sim t$ and Coulomb...
Charge ordering in the spinels AlV$_2$O$_4$ and LiV$_2$O$_4$ (2005)
Zhang, Y. Z., Fulde, P., Thalmeier, P., Yaresko, A.
We develop a microscopic theory for the charge ordering (CO) transitions in the spinels AlV$_2$O$_4$ and LiV$_2$O$_4$ (under pressure). The high degeneracy of CO states is lifted by a coupling to the...
Field-angle resolved specific heat and thermal conductivity in the vortex phase of UPd_2Al_3 (2005)
Thalmeier, P., Watanabe, T., Izawa, K., Matsuda, Y.
The field-angle dependent specific heat and thermal conductivity in the vortex phase of UPd_2Al_3 is studied using the Doppler shift approximation for the low energy quasiparticle excitations. We...
Watanabe,T., Izawa,K., Kasahara,Y., Haga,Y., Onuki,Y., Thalmeier,P., ...
Multiple superconducting phases in heavy fermion superconductors (2005)
Matsuda,Y., Izawa,K., Watanabe,T., Kasahara,Y., Nakajima,Y., Sakakibara,T., ...
Superconductivity in heavy fermion compounds (2005)
Thalmeier,P., Zwicknagel,G., Stockert,O., Sparn,G., Steglich,F.
Multiple superconducting phases in heavy fermion superconductors (2005)
Matsuda, Y., Izawa, K., Watanabe, T., Kasahara, Y., Nakajima, Y., Sakakibara, T., ...
Superconductivity in heavy fermion compounds (2005)
Thalmeier, P., Zwicknagel, G., Stockert, O., Sparn, G., Steglich, F.
Metal-insulator transition in the quarter- filled frustrated checkerboard lattice (2004)
Zhang, Y. Z., Minh-Tien, Tran, Yushankhai, V., Thalmeier, P.
We study the electronic structure and correlations in the geometrically frustrated two dimensional checkerboard lattice. In the large U limit considered here we start from an extended Hubbard model...
Watanabe,T., Izawa,K., Kasahara,Y., Haga,Y., Onuki,Y., Thalmeier,P., ...
Superconductivity in heavy fermion compounds (2004)
Thalmeier, P., Zwicknagl, G., Stockert, O., Sparn, G., Steglich, F.
We review the current state of experimental and theoretical investigations of heavy fermion superconductors. We discuss most of the Ce-based compounds like Ce122, Ce115, Ce218 and Ce131 classes and...
Watanabe, T., Izawa, K., Kasahara, Y., Haga, Y., Onuki, Y., Thalmeier, P., ...
The superconducting gap structure of heavy fermion UPd_2Al_3, in which unconventional superconductivity coexists with antiferromagnetic (AF) order with atomic size local moments, was investigated by...
Four-Well Tunneling States and Elastic Response of Clathrates (2004)
Zerec,I., Keppens,V., McGuire,M. A., Mandrus,D., Sales,B. C., Thalmeier,P.
Izawa,K., Nakajima,Y., Goryo,J., Matsuda,Y., Osaki,S., Sugawara,H., ...