phase transitions; neutron scattering; magnetism; dipolar; quantum magnetism
Monney Claude, Bisogni Valentina, Zhou Ke-Jin, Kraus Roberto, Strocov Vladimir N., Behr Guenter, Malek Jiri, Kuzian Roman, Drechsler Stefan-Ludwig, Johnston Steve, Revcolevschi Alexandre, Buechner Bernd, Ronnow Henrik M., van den Brink Jeroen, Geck Jochen, Schmitt Thorsten (2013), Determining the Short-Range Spin Correlations in the Spin-Chain Li2CuO2 and CuGeO3 Compounds Using Resonant Inelastic X-Ray Scattering, in
PHYSICAL REVIEW LETTERS, 110(8), 087403.
Casola F., Shiroka T., Feiguin A., Wang S., Grbie M. S., Horvatie M., Kraemer S., Mukhopadhyay S., Conder K., Berthier C., Ott H. -R., Ronnow H. M., Rueegg Ch., Mesot J. (2013), Field-Induced Quantum Soliton Lattice in a Frustrated Two-Leg Spin-1/2 Ladder, in
PHYSICAL REVIEW LETTERS, 110(18), 014408.
Romer A. T., Chang J., Christensen N. B., Andersen B. M., Lefmann K., Maehler L., Gavilano J., Gilardi R., Niedermayer Ch., Ronnow H. M., Schneidewind A., Link P., Oda M., Ido M., Momono N., Mesot J. (2013), Glassy low-energy spin fluctuations and anisotropy gap in La1.88Sr0.12CuO4, in
PHYSICAL REVIEW B, 87(14), 144513.
Nilsen G. J., de Vries M. A., Stewart J. R., Harrison A., Ronnow H. M. (2013), Low-energy spin dynamics of the s=1/2 kagome system herbertsmithite, in
JOURNAL OF PHYSICS-CONDENSED MATTER, 25(10), 106001.
de Vries M. A., Piatek J. O., Misek M., Lord J. S., Ronnow H. M., Bos J-W G. (2013), Low-temperature spin dynamics of a valence bond glass in Ba2YMoO6, in
NEW JOURNAL OF PHYSICS, 15, 043024.
Kohama Yoshimitsu, Wang Shuang, Uchida Atsuko, Prsa Krunoslav, Zvyagin Sergei, Skourski Yuri, McDonald Ross D., Balicas Luis, Ronnow Henrik M., Rueegg Christian, Jaime Marcelo (2012), Anisotropic Cascade of Field-Induced Phase Transitions in the Frustrated Spin-Ladder System BiCu2PO6, in
PHYSICAL REVIEW LETTERS, 109(16), 167204.
Kraemer Conradin, Nikseresht Neda, Piatek Julian O., Tsyrulin Nikolay, Dalla Piazza Bastien, Kiefer Klaus, Klemke Bastian, Rosenbaum Thomas F., Aeppli Gabriel, Gannarelli Che, Prokes Karel, Podlesnyak Andrey, Straessle Thierry, Keller Lukas, Zaharko Oksana, Kraemer Karl W., Ronnow Henrik M. (2012), Dipolar Antiferromagnetism and Quantum Criticality in LiErF4, in
SCIENCE, 336(6087), 1416-1419.
Fallahi S, Mazaheri M, Nikseresht N, Ronnow HM, Akhavan M (2012), Effect of Ca substitution on crystal structure and superconducting properties of ferromagnetic superconductor RuSr2-xCaxGd1.4Ce0.6Cu2O10-delta, in
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 324(6), 949-954.
White J. S., Levatic I., Omrani A. A., Egetenmeyer N., Prsa K., Zivkovic I., Gavilano J. L., Kohlbrecher J., Bartkowiak M., Berger H., Ronnow H. M. (2012), Electric field control of the skyrmion lattice in Cu2OSeO3, in
JOURNAL OF PHYSICS-CONDENSED MATTER, 24(43), 432201.
Tsyrulin N., Viennois R., Giannini E., Boehm M., Jimenez-Ruiz M., Omrani A. A., Piazza B. Dalla, Ronnow H. M. (2012), Magnetic hourglass dispersion and its relation to high-temperature superconductivity in iron-tuned Fe1+yTe0.7Se0.3, in
NEW JOURNAL OF PHYSICS, 14, 073025.
Thorsmolle V. K., Homes C. C., Gozar A., Blumberg G., van Mechelen J. L. M., Kuzmenko A. B., Vanishri S., Marin C., Ronnow H. M. (2012), Phonon Energy Gaps in the Charged Incommensurate Planes of the Spin-Ladder Sr14Cu24O41 Compound by Raman and Infrared Spectroscopy, in
PHYSICAL REVIEW LETTERS, 108(21), 217401.
Zivkovic I., Djokic D. M., Herak M., Pajic D., Prsa K., Pattison P., Dominko D., Mickovic Z., Cincic D., Forro L., Berger H., Ronnow H. M. (2012), Site-selective quantum correlations revealed by magnetic anisotropy in the tetramer system SeCuO3, in
PHYSICAL REVIEW B, 86(5), 054405.
Dean M. P. M., Springell R. S., Monney C., Zhou K. J., Pereiro J., Bozovic I., Dalla Piazza B., Ronnow H. M., Morenzoni E., van den Brink J., Schmitt T., Hill J. P. (2012), Spin excitations in a single La2CuO4 layer, in
NATURE MATERIALS, 11(10), 850-854.
Schlappa J., Wohlfeld K., Zhou K. J., Mourigal M., Haverkort M. W., Strocov V. N., Hozoi L., Monney C., Nishimoto S., Singh S., Revcolevschi A., Caux J. -S., Patthey L., Ronnow H. M., van den Brink J., Schmitt T. (2012), Spin-orbital separation in the quasi-one-dimensional Mott insulator Sr2CuO3, in
NATURE, 485(7396), 82-82.
Dalla Piazza B., Mourigal M., Guarise M., Berger H., Schmitt T., Zhou K. J., Grioni M., Ronnow H. M. (2012), Unified one-band Hubbard model for magnetic and electronic spectra of the parent compounds of cuprate superconductors, in
PHYSICAL REVIEW B, 85(10), 100508.
Maisuradze A, Guguchia Z, Graneli B, Ronnow HM, Berger H, Keller H (2011), mu SR investigation of magnetism and magnetoelectric coupling in Cu2OSeO3, in
PHYSICAL REVIEW B, 84(6), 064433-064433.
Nilsen GJ, Coomer FC, de Vries MA, Stewart JR, Deen PP, Harrison A, Ronnow HM (2011), Pair correlations, short-range order, and dispersive excitations in the quasi-kagome quantum magnet volborthite, in
PHYSICAL REVIEW B, 84(17), 172401-172401.
Thompson JD, McClarty PA, Ronnow HM, Regnault LP, Sorge A, Gingras MJP (2011), Rods of Neutron Scattering Intensity in Yb2Ti2O7: Compelling Evidence for Significant Anisotropic Exchange in a Magnetic Pyrochlore Oxide, in
PHYSICAL REVIEW LETTERS, 106(18), 187202-187202.
Fennell T, Piatek JO, Stephenson RA, Nilsen GJ, Ronnow HM (2011), Spangolite: an s=1/2 maple leaf lattice antiferromagnet?, in
JOURNAL OF PHYSICS-CONDENSED MATTER, 23(16), 164201-164201.
Wang S, Pomjakushina E, Shiroka T, Deng G, Nikseresht N, Ruegg C, Ronnow HM, Conder K (2010), Crystal growth and characterization of the dilutable frustrated spin-ladder compound Bi(Cu1-xZnx)(2)PO6, in
JOURNAL OF CRYSTAL GROWTH, 313(1), 51-55.
Guarise M, Dalla Piazza B, Moretti Sala M, Ghiringhelli G, Braicovich L, Berger H, Hancock JN, van der Marel D, Schmitt T, Strocov VN, Ament LJP, van den Brink J, Lin PH, Xu P, Ronnow HM, Grioni M (2010), Measurement of Magnetic Excitations in the Two-Dimensional Antiferromagnetic Sr2CuO2Cl2 Insulator Using Resonant X-Ray Scattering: Evidence for Extended Interactions, in
PHYSICAL REVIEW LETTERS, 105(15), 157006-157006.
Quantum magnetism remains at the forefront of condensed matter physics. On one hand, it provides the ideal arena for developing and testing new fundamental concepts in solid-state and statistical physics, on the other hand it has a pivotal role in several classes of emerging materials with new electronic properties, e.g. the high-temperature superconducting cuprates and potentially solid state quantum information processing.As requested by the SNF, this proposal combines for aligned continuation two successful research programs within the Laboratory for Quantum Magnetism and its collaborators. A) Dimer Physics concern synthesis and experiments on materials hosting spin-1/2 pairs - the archetype of quantum entanglement - as building block for the occurrence of novel quantum phenomena and phases: Hard-core boson statistics, Bose-Einstein condensation, quantum phase transitions (QPTs) to new phases such as supersolids, and possible mechanisms to superconductivity. B) Dipolar Criticality is the experimental and theoretical investigation of quantum and thermal phase transitions, spin-glassiness and other phenomena in a family of insulating magnetic compounds, where dipolar forces between highly anisotropic rare-earth moments determine the effective model Hamiltonian.