Zobrazeno 1 - 10
of 104
pro vyhledávání: '"Schulthess, T. C."'
Publikováno v:
Phys. Rev. B 97, 184507 (2018)
Dynamic cluster quantum Monte Carlo calculations for a doped two-dimensional extended Hubbard model are used to study the stability and dynamics of $d$-wave pairing when a near neighbor Coulomb repulsion $V$ is present in addition to the on-site Coul
Externí odkaz:
http://arxiv.org/abs/1707.06093
Autor:
Jiang, Mi, Schulthess, T. C. S.
The interaction-driven insulator-to-metal transition has been reported in the ionic Hubbard model (IHM) for moderate interaction $U$, while its metallic phase only occupies a narrow region in the phase diagram. To explore the enlargement of the metal
Externí odkaz:
http://arxiv.org/abs/1604.03271
Publikováno v:
Phys. Rev. B 93, 165144 (2016)
The dynamical cluster approximation (DCA) and its DCA$^+$ extension use coarse-graining of the momentum space to reduce the complexity of quantum many-body problems, thereby mapping the bulk lattice to a cluster embedded in a dynamical mean-field hos
Externí odkaz:
http://arxiv.org/abs/1601.03838
Publikováno v:
Phys. Rev. B 93, 075115 (2016)
The Hubbard model, which augments independent-electron band theory with a single parameter to describe electron-electron correlations, is widely regarded to be the `standard model' of condensed matter physics. The model has been remarkably successful
Externí odkaz:
http://arxiv.org/abs/1508.04357
Publikováno v:
Phys. Rev. Lett. 104, 247001 (2010)
Using dynamic cluster quantum Monte Carlo simulations, we study the superconducting behavior of a 1/8 doped two-dimensional Hubbard model with imposed uni-directional stripe-like charge density wave modulation. We find a significant increase of the p
Externí odkaz:
http://arxiv.org/abs/0912.2092
Publikováno v:
Phys. Rev. B 81 115107 (2010)
A quasi-classical theoretical description of polarization and relaxation of nuclear spins in a quantum dot with one resident electron is developed for arbitrary mechanisms of electron spin polarization. The dependence of the electron-nuclear spin dyn
Externí odkaz:
http://arxiv.org/abs/0907.2661
Autor:
Kent, P. R. C., Saha-Dasgupta, T., Jepsen, O., Andersen, O. K., Macridin, A., Maier, T. A., Jarrell, M., Schulthess, T. C.
Publikováno v:
Physical Review B 78 035132 (2008)
Using a combined local density functional theory (LDA-DFT) and quantum Monte Carlo (QMC) dynamic cluster approximation approach, the parameter dependence of the superconducting transition temperature Tc of several single-layer hole-doped cuprate supe
Externí odkaz:
http://arxiv.org/abs/0806.3770
Publikováno v:
Phys. Rev. B 76, 024433 (2007)
We study the phase diagram of a quasi-two dimensional magnetic system ${\rm Rb_2MnF_4}$ with Monte Carlo simulations of a classical Heisenberg spin Hamiltonian which includes the dipolar interactions between ${\rm Mn}^{2+}$ spins. Our simulations rev
Externí odkaz:
http://arxiv.org/abs/0705.3863
We present first-principles electronic structure calculations of Mn doped III-V semiconductors based on the local spin-density approximation (LSDA) as well as the self-interaction corrected local spin density method (SIC-LSD). We find that it is cruc
Externí odkaz:
http://arxiv.org/abs/cond-mat/0610378
Autor:
Alvarez, G., Schulthess, T. C.
Publikováno v:
Phys. Rev. B 73, 035117 (2006)
The calculation of two- and four-particle observables is addressed within the framework of the truncated polynomial expansion method (TPEM). The TPEM replaces the exact diagonalization of the one-electron sector in models for fermions coupled to clas
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607607