Search Results - "Piazza, B. Dalla"

Fractional excitations in the square-lattice quantum antiferromagnet by Dalla Piazza, B., Mourigal, M., Christensen, N. B., Nilsen, G. J., Tregenna-Piggott, P., Perring, T. G., Enderle, M., McMorrow, D. F., Ivanov, D. A., Rønnow, H. M.

“…Quantum magnets have occupied the fertile ground between many-body theory and low-temperature experiments on real materials since the early days of quantum…”
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Anisotropic softening of magnetic excitations along the nodal direction in superconducting cuprates by Guarise, M., Piazza, B. Dalla, Berger, H., Giannini, E., Schmitt, T., Rønnow, H. M., Sawatzky, G. A., van den Brink, J., Altenfeld, D., Eremin, I., Grioni, M.

“…The high- T c cuprate superconductors are close to antiferromagnetic order. Recent measurements of magnetic excitations have reported an intriguing similarity…”
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The electronic structure of the high-symmetry perovskite iridate Ba2IrO4 by Moser, S, Moreschini, L, Ebrahimi, A, Dalla Piazza, B, Isobe, M, Okabe, H, Akimitsu, J, Mazurenko, V V, Kim, K S, Bostwick, A, Rotenberg, E, Chang, J, Rønnow, H M, Grioni, M

“…We report angle-resolved photoemission (ARPES) measurements, density functional and model tight-binding calculations on Ba2IrO4 (Ba-214), an antiferromagnetic…”
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Spin excitations in a single La2CuO4 layer by Dean, M. P. M., Springell, R. S., Monney, C., Zhou, K. J., Pereiro, J., Božović, I., Dalla Piazza, B., Rønnow, H. M., Morenzoni, E., van den Brink, J., Schmitt, T., Hill, J. P.

“…The dynamics of spins in single atomic layers of cuprates and other compounds are important for understanding their properties, such as magnetism and…”
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Measurement of magnetic excitations in the two-dimensional antiferromagnetic Sr₂CuO₂Cl₂ insulator using resonant x-ray scattering: evidence for extended interactions by Guarise, M, Dalla Piazza, B, Moretti Sala, M, Ghiringhelli, G, Braicovich, L, Berger, H, Hancock, J N, van der Marel, D, Schmitt, T, Strocov, V N, Ament, L J P, van den Brink, J, Lin, P-H, Xu, P, Rønnow, H M, Grioni, M

“…We measured the momentum dependence of magnetic excitations in the model spin-1/2 2D antiferromagnetic insulator Sr2CuO2Cl2 (SCOC). We identify a…”
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Unified one-band Hubbard model for magnetic and electronic spectra of the parent compounds of cuprate superconductors by Dalla Piazza, B., Mourigal, M., Guarise, M., Berger, H., Schmitt, T., Zhou, K. J., Grioni, M., Rønnow, H. M.

“…Using low-energy projection of the one-band t-t'-t" Hubbard model we derive an effective spin Hamiltonian and its spin-wave expansion to order 1/S. We fit the…”
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Magnons in tetragonal CuO by Moser, S., Shaik, N. E., Samal, D., Fatale, S., Dalla Piazza, B., Dantz, M., Pelliciari, J., Olalde-Velasco, P., Schmitt, T., Koster, G., Mila, F., Rønnow, H. M., Grioni, M.

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Magnetic hourglass dispersion and its relation to high-temperature superconductivity in iron-tuned Fe1+yTe0.7Se0.3 by Tsyrulin, N, Viennois, R, Giannini, E, Boehm, M, Jimenez-Ruiz, M, Omrani, A A, Dalla Piazza, B, Rønnow, H M

“…High-temperature superconductivity remains arguably the greatest enigma of condensed matter physics. The discovery of iron-based high-temperature…”
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Staggered-flux state for rectangular-lattice spin 1/2 Heisenberg antiferromagnet by Shaik, N. E, Piazza, B. Dalla, Ivanov, D. A, Rønnow, H. M

“…Phys. Rev. B 102, 214413 (2020) We investigate the spin-1/2 Heisenberg model on a rectangular lattice, using the Gutzwiller projected variational wave function…”
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Non-equilibrium hysteresis and spin relaxation in the mixed-anisotropy dipolar coupled spin-glass LiHo$_{0.5}$Er$_{0.5}$F$_{4} by Piatek, J. O, Kovacevic, I, Babkevich, P, Piazza, B. Dalla, Neithardt, S, Gavilano, J, Krämer, K. W, Rønnow, H. M

“…Phys. Rev. B 90, 174427 (2014) We present a study of the model spin-glass LiHo$_{0.5}$Er$_{0.5}$F$_4$ using simultaneous AC susceptibility, magnetization and…”
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Spin-Orbit-Induced Orbital Excitations in Sr2RuO4 and Ca2RuO4: A Resonant Inelastic X-ray Scattering Study by Fatuzzo, C. G, Dantz, M, Fatale, S, Olalde-Velasco, P, Shaik, N. E, Piazza, B. Dalla, Toth, S, Pelliciari, J, Fittipaldi, R, Vecchione, A, Kikugawa, N, Brooks, J. S, Rønnow, H. M, Grioni, M, Rüegg, Ch, Schmitt, T, Chang, J

“…Phys. Rev. B 91, 155104 (2015) High-resolution resonant inelastic X-ray scattering (RIXS) at the oxygen K-edge has been used to study the orbital excitations…”
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Fractional excitations in the square-lattice quantum antiferromagnet by Piazza, B. Dalla, Mourigal, M, Christensen, N. B, Nilsen, G. J, Tregenna-Piggott, P, Perring, T. G, Enderle, M, McMorrow, D. F, Ivanov, D. A, Rønnow, H. M

“…Nature Physics 11 (2015) 62-68 The square-lattice quantum Heisenberg antiferromagnet displays a pronounced anomaly of unknown origin in its magnetic excitation…”
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The electronic structure of the high-symmetry perovskite iridate Ba2IrO4 by Moser, S, Moreschini, L, Ebrahimi, A, Piazza, B. Dalla, Isobe, M, Okabe, H, Akimitsu, J, Mazurenko, V. V, Kim, K. S, Bostwick, A, Rotenberg, E, Chang, J, Rønnow, H. M, Grioni, M

“…New Journal of Physics, 16 013008 (2014) We report angle-resolved photoemission (ARPES) measurements, density functional and model tight-binding calculations…”
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Magnetic hour-glass dispersion and its relation to high-temperature superconductivity in iron-tuned Fe$_{1+y}$Te$_{0.7}$Se$_{0.3} by Tsyrulin, N, Viennois, R, Giannini, E, Boehm, M, Jimenez-Ruiz, M, Omrani, A. A, Piazza, B. Dalla, Ronnow, H. M

“…New J. Phys. 14 (2012) 073025 High-temperature superconductivity remains arguably the largest outstanding enigma of condensed matter physics. The discovery of…”
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Phase diagram with enhanced spin-glass region of mixed Ising / XY magnets LiHo$_{x}$Er$_{1-x}$F$_{4} by Piatek, J. O, Piazza, B. Dalla, Nikseresht, N, Tsyrulin, N, Živković, I, Krämer, K. W, Laver, M, Prokes, K, Mataš, S, Christensen, N. B, Rønnow, H. M

“…Phys. Rev. B 88, 014408 (2013) We present the experimental phase diagram of LiHo$_x$Er$_{1-x}$F$_4$, a dilution series of dipolar-coupled model magnets.The…”
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Unified quantitative model for magnetic and electronic spectra of the undoped cuprates by Piazza, B. Dalla, Mourigal, M, Guarise, M, Berger, H, Schmitt, T, Grioni, M, Ronnow, H. M

“…Phys. Rev. B 85, 100508(R) (2012) Using low-energy projection of the one-band t-t'-t"-Hubbard model we derive an effective spin-Hamiltonian and its spin-wave…”
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Magnetic hourglass dispersion and its relation to high-temperature superconductivity in iron-tuned Fe 1+ y Te 0.7 Se 0.3 by Tsyrulin, N, Viennois, R, Giannini, E, Boehm, M, Jimenez-Ruiz, M, Omrani, A A, Dalla Piazza, B, Rønnow, H M

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The electronic structure of the high-symmetry perovskite iridate Ba 2 IrO 4 by Moser, S, Moreschini, L, Ebrahimi, A, Dalla Piazza, B, Isobe, M, Okabe, H, Akimitsu, J, Mazurenko, V V, Kim, K S, Bostwick, A, Rotenberg, E, Chang, J, Rønnow, H M, Grioni, M

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The electronic structure of the high-symmetry perovskite iridate Ba sub(2)lrO sub(4) by Moser, S, Moreschini, L, Ebrahimi, A, Piazza, B Dalla, Isobe, M, Okabe, H, Akimitsu, J, Mazurenko, V V, Kim, K S, Bostwick, A, Rotenberg, E, Chang, J, Ronnow, H M, Grioni, M

“…We report angle-resolved photoemission (ARPES) measurements, density functional and model tight-binding calculations on Ba sub(2)IrO sub(4) (Ba-214), an…”
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Spin excitations in a single La sub(2)CuO sub(4) layer by Dean, MPM, Springell, R S, Monney, C, Zhou, K J, Pereiro, J, Bozovic, I, Dalla Piazza, B, Roennow, H M, Morenzoni, E, van den Brink, J, Schmitt, T, Hill, J P

“…Cuprates and other high-temperature superconductors consist of two-dimensional layers that are crucial to their properties. The dynamics of the quantum spins…”
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