Zobrazeno 1 - 10
of 41
pro vyhledávání: '"B. Dalla Piazza"'
Publikováno v:
Physical Review B. 102
We investigate the spin-$\frac{1}{2}$ Heisenberg model on a rectangular lattice, using the Gutzwiller projected variational wave function known as the staggered flux state. Using Monte Carlo techniques, the variational parameters and instantaneous sp
Autor:
S Moser, L Moreschini, A Ebrahimi, B Dalla Piazza, M Isobe, H Okabe, J Akimitsu, V V Mazurenko, K S Kim, A Bostwick, E Rotenberg, J Chang, H M Rønnow, M Grioni
Publikováno v:
New Journal of Physics, Vol 16, Iss 1, p 013008 (2014)
We report angle-resolved photoemission (ARPES) measurements, density functional and model tight-binding calculations on Ba _2 IrO _4 (Ba-214), an antiferromagnetic ( T _N = 230 K) insulator. Ba-214 does not exhibit the rotational distortion of the Ir
Externí odkaz:
https://doaj.org/article/5a5208d6bfdf43c78e15e068ae8b126c
Autor:
S. Mat'as, Karl Krämer, I. Kovacevic, P. Babkevich, Conradin Kraemer, Karel Prokes, J. O. Piatek, B. Dalla Piazza, Henrik M. Rønnow, Jens Jensen, N. Nikseresht
Publikováno v:
Physical Review B. 94
We present a systematic study of the phase diagram of ${\mathrm{LiHo}}_{x}{\mathrm{Y}}_{1\ensuremath{-}x}{\mathrm{F}}_{4}$ ($0.25\ensuremath{\le}x\ensuremath{\le}1$) Ising ferromagnets obtained from neutron scattering measurements and mean-field calc
Autor:
Paul Olalde-Velasco, B. Dalla Piazza, Sara Fatale, Henrik M. Rønnow, N. E. Shaik, Thorsten Schmitt, Rosalba Fittipaldi, Ch. Rüegg, Antonio Vecchione, Naoki Kikugawa, Johan Chang, Marco Grioni, C. G. Fatuzzo, J. Pelliciari, Marcus Dantz, J. S. Brooks, Sándor Tóth
Publikováno v:
Physical Review B. 91
Autor:
J. Pelliciari, Sara Fatale, Sándor Tóth, Thorsten Schmitt, Ch. Rüegg, Antonio Vecchione, Naoki Kikugawa, Marco Grioni, Johan Chang, C. G. Fatuzzo, Marcus Dantz, N. E. Shaik, J. S. Brooks, Paul Olalde-Velasco, Henrik M. Rønnow, B. Dalla Piazza, Rosalba Fittipaldi
Publikováno v:
Physical Review B. 91
High-resolution resonant inelastic x-ray scattering (RIXS) at the oxygen K edge has been used to study the orbital excitations of Ca2RuO4 and Sr2RuO4. In combination with linear dichroism x-ray absorption spectroscopy, the ruthenium 4d-orbital occupa
Autor:
P. Babkevich, 1, A. Finco, 2 M. Jeong, 1 B. Dalla Piazza, 1 I. Kovacevic, 1 G. Klughertz, 3 K. W. Kramer, 4 C. Kraemer, 1 D. T. Adroja, 5 E. Goremychkin, 5 T. Unruh, 6, 7 T. Strassle, 8 A. Di Lieto, 9, 10 J. Jensen, H. M. Rønnow 1
Publikováno v:
Physical review. B, Condensed matter and materials physics 92 (2015). doi:10.1103/PhysRevB.92.144422
info:cnr-pdr/source/autori:P. Babkevich,1, A. Finco,1,2 M. Jeong, 1 B. Dalla Piazza, 1 I. Kovacevic,1 G. Klughertz,1,3 K. W. Kramer,4 C. Kraemer,1 D. T. Adroja,5 E. Goremychkin, 5 T. Unruh,6,7 T. Strassle,8 A. Di Lieto,9,10 J. Jensen, 11 and H. M. Rønnow 1/titolo:Neutron spectroscopic study of crystal-field excitations and the effect of the crystal field on dipolar magnetism in LiRF4 (R = Gd, Ho, Er, Tm, and Yb)/doi:10.1103%2FPhysRevB.92.144422/rivista:Physical review. B, Condensed matter and materials physics/anno:2015/pagina_da:/pagina_a:/intervallo_pagine:/volume:92
info:cnr-pdr/source/autori:P. Babkevich,1, A. Finco,1,2 M. Jeong, 1 B. Dalla Piazza, 1 I. Kovacevic,1 G. Klughertz,1,3 K. W. Kramer,4 C. Kraemer,1 D. T. Adroja,5 E. Goremychkin, 5 T. Unruh,6,7 T. Strassle,8 A. Di Lieto,9,10 J. Jensen, 11 and H. M. Rønnow 1/titolo:Neutron spectroscopic study of crystal-field excitations and the effect of the crystal field on dipolar magnetism in LiRF4 (R = Gd, Ho, Er, Tm, and Yb)/doi:10.1103%2FPhysRevB.92.144422/rivista:Physical review. B, Condensed matter and materials physics/anno:2015/pagina_da:/pagina_a:/intervallo_pagine:/volume:92
We present a systematic study of the crystal-field interactions in the LiRF4 (R = Gd, Ho, Er, Tm, and Yb) family of rare-earth magnets. Using detailed inelastic neutron scattering measurements, we have been able to quantify the transition energies an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=cnr_________::f45a68ac6abcb83d14bee0b6a18d3f1b
http://www.cnr.it/prodotto/i/347659
http://www.cnr.it/prodotto/i/347659
Autor:
Henrik M. Rønnow, Jorge L. Gavilano, Karl Krämer, P. Babkevich, I. Kovacevic, J. O. Piatek, B. Dalla Piazza, S. Neithardt
Publikováno v:
Physical Review B. 90
We present a study of the model spin-glass LiHo0.5Er0.5F4 using simultaneous ac susceptibility, magnetization, and magnetocaloric effect measurements along with small angle neutron scattering (SANS) at sub-Kelvin temperatures. All measured bulk quant
Autor:
Aaron Bostwick, Johan Juul Chang, E. Rotenberg, Kwiseon Kim, D. Prabhakaran, A. Ebrahimi, Henrik M. Rønnow, D. F. McMorrow, Simon Moser, B. Dalla Piazza, S. Boseggia, Marco Grioni, Luca Moreschini, Andrew T. Boothroyd
Publikováno v:
Physical Review B. 89
The influence of dimensionality on the electronic properties of layered perovskite materials remains an outstanding issue. We address it here for Sr3Ir2O7, the bilayer compound of the iridate Srn+1IrnO3n+1 series. By angle-resolved photoemission spec
Autor:
Bernard Normand, Niels Bech Christensen, Henrik M. Rønnow, Ekaterina Pomjakushina, Loïc Le Dréau, R. Chati, R. Pramod, Vladimir Pomjakushin, V. I. Schnells, B. Dalla Piazza, Olav F. Syljuåsen, Kazimierz Conder, Petra Häfliger, Simon Gerber
Publikováno v:
Physical Review B. 89
We study the zero-point and thermal ionic motion in La2CuO4 by means of high-resolution neutron-diffraction experiments. Our results demonstrate anisotropic motion of O and, to a lesser extent, Cu ions, both consistent with the structure of coupled C
Autor:
Karl Krämer, N. Nikseresht, S. Mat'as, Niels Bech Christensen, Mark Laver, Henrik M. Rønnow, J. O. Piatek, Karel Prokes, B. Dalla Piazza, Ivica Živković, N. Tsyrulin
Publikováno v:
Physical Review B. 88
We present the experimental phase diagram of LiHoxEr1-xF4, a dilution series of dipolar-coupled model magnets. The phase diagram was determined using a combination of ac susceptibility and neutron scattering. Three unique phases in addition to the Is