Zobrazeno 1 - 10
of 591
pro vyhledávání: '"Poilblanc, D."'
Autor:
Yoshida, M., Kobayashi, H., Yamauchi, I., Takigawa, M., Capponi, S., Poilblanc, D., Mila, F., Kudo, K., Koike, Y., Kobayashi, N.
Publikováno v:
Phys. Rev. Lett. 114, 056402 (2015)
We report on the real space profile of spin polarons in the quasi two-dimensional frustrated dimer spin system SrCu2(BO3)2 doped with 0.16% of Zn. The 11B nuclear magnetic resonance spectrum exhibits 15 additional boron sites near non-magnetic Zn imp
Externí odkaz:
http://arxiv.org/abs/1407.6198
Autor:
Yang, S., Lehman, L., Poilblanc, D., Van Acoleyen, K., Verstraete, F., Cirac, J. I., Schuch, N.
Publikováno v:
Phys. Rev. Lett. 112, 036402 (2014)
We study the edge physics of gapped quantum systems in the framework of Projected Entangled Pair State (PEPS) models. We show that the effective low-energy model for any region acts on the entanglement degrees of freedom at the boundary, correspondin
Externí odkaz:
http://arxiv.org/abs/1309.4596
Publikováno v:
Phys. Rev. B 87, 104512 (2013)
Quantum Dimer Models (QDM) arise as low energy effective models for frustrated magnets. Some of these models have proven successful in generating a scenario for exotic spin liquid phases with deconfined spinons. Doping, i.e. the introduction of mobil
Externí odkaz:
http://arxiv.org/abs/1210.1270
Publikováno v:
Phys. Rev. Lett. 109, 016403 (2012)
We prove a "statistical transmutation" symmetry of doped quantum dimer models on the square, triangular and kagome lattices: the energy spectrum is invariant under a simultaneous change of statistics (i.e. bosonic into fermionic or vice-versa) of the
Externí odkaz:
http://arxiv.org/abs/1202.3618
Autor:
Poilblanc, D., Ralko, A.
Publikováno v:
Phys. Rev. B 82, 174424 (2010)
The doping of quantum Heisenberg antiferromagnets on the kagome lattice by non-magnetic impurities is investigated within the framework of a generalized quantum dimer model (QDM) describing a) the valence bond crystal (VBC), b) the dimer liquid and c
Externí odkaz:
http://arxiv.org/abs/1006.5370
Publikováno v:
Phys. Rev. Lett. 104, 127203 (2010)
Bosonic and fermionic Hubbard models on the checkerboard lattice are studied numerically for infinite on-site repulsion. At particle density n=1/4 and strong nearest-neighbor repulsion, insulating Valence Bond Crystals (VBC) of resonating particle pa
Externí odkaz:
http://arxiv.org/abs/0912.2036
Publikováno v:
Phys. Rev. B 80, 184427 (2009)
Aiming to describe frustrated quantum magnets with non-magnetic singlet ground states, we have extended the Rokhsar-Kivelson (RK) loop-expansion to derive a generalized Quantum Dimer Model containing only connected terms up to arbitrary order. For th
Externí odkaz:
http://arxiv.org/abs/0905.2039
Publikováno v:
Phys. Rev. B 80, 094407 (2009)
Controlled doping of SrCu$_2$(BO$_3$)$_2$, a faithful realization of the Heisenberg spin-1/2 antiferromagnet on the Shastry-Sutherland lattice, with non-magnetic impurities generates bound-states below the spin gap. These bound-states and their symme
Externí odkaz:
http://arxiv.org/abs/0902.1456
Autor:
Rüegg, Ch., Kiefer, K., Thielemann, B., McMorrow, D. F., Zapf, V., Normand, B., Zvonarev, M. B., Bouillot, P., Kollath, C., Giamarchi, T., Capponi, S., Poilblanc, D., Biner, D., Krämer, K. W.
Publikováno v:
Phys. Rev. Lett. 101, 247202 (2008)
The phase diagram in temperature and magnetic field of the metal-organic, two-leg, spin-ladder compound (C5H12N)2CuBr4 is studied by measurements of the specific heat and the magnetocaloric effect. We demonstrate the presence of an extended spin Lutt
Externí odkaz:
http://arxiv.org/abs/0808.2715
Publikováno v:
Phys.Rev.B78, 195101 (2008)
We study a model of strongly correlated S=1/2 fermions on the planar pyrochlore, or checkerboard, lattice, at fractional (1/8) filling. Starting with the extended Hubbard model in the limit of strong Coulomb repulsion, low-energy configurations can b
Externí odkaz:
http://arxiv.org/abs/0806.4763