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Selected recent publications

Dr. Yixi Su

Magnetic anisotropy in hole-doped superconducting Ba0.67K0.33Fe2As2 probed by polarized inelastic neutron scattering.
Chenglin Zhang, Mengshu Liu, Yixi Su, Louis-Pierre Regnault, Meng Wang, Guotai Tan, Th. Brueckel, Takeshi Egami, and Pengcheng Dai, Phys. Rev. B 87, 081101(R) (2013)

Higgs transition from magnetic Coulomb liquid to ferromagnet in Yb2Ti2O7.
Lieh-Jeng Chang, Shigeki Onoda, Yixi Su, Ying-Jer Kao, Ku-Ding Tsuei, Yukio Yasui, Kazuhisa Kakurai and Martin Richard Lees, Nature Communications 3, 992 (2012) (DOI: 10.1038/ncomms1989)

Competing Ferri- and Antiferromagnetic Phases in Geometrically Frustrated LuFe2O4.
J. de Groot, K. Marty, M.D. Lumsden, A.D. Christianson, S.E. Nagler, S. Adiga, W.J.H. Borghols, K. Schmalzl, Z. Yamani, S.R. Bland, R. de Souza, U. Staub, W. Schweika, Y. Su and M. Angst, Phys. Rev. Lett. 108, 037206 (2012)

Strong coupling of Sm and Fe magnetism in SmFeAsO as revealed by magnetic x-ray scattering.
S. Nandi, Y. Su, Y. Xiao, S. Price, X.F. Wang, X.H. Chen, J. Herrero-Martin, C. Mazzoli, H. C. Walker, L. Paolasini, S. Francoual, D.K. Shukla, J. Strempfer, T. Chatterji, C.M.N. Kumar, R. Mittal, H.M. Rønnow, Ch. Rueegg, D.F. McMorrow and Th. Brueckel, Phys. Rev. B 84, 054419 (2011)

Spatial inhomogeneity in RFeAs(O,F)(R =Pr, Nd) determined from rare-earth crystal- field excitations.
E.A. Goremychkin, R. Osborn, C.H. Wang, M.D. Lumsden, M.A. McGuire, A.S. Sefat, B.C. Sales, D. Mandrus, H.M. Ronnow, Y. Su, and A.D. Christianson, Phys. Rev. B 83, 212505 (2011)

Helical spin-waves, magnetic order, and fluctuations in the langasite compound Ba3NbFe3Si2O14.
C. Stock, L.C. Chapon, A. Schneidewind, Y. Su, P.G. Radaelli, D.F. McMorrow, A. Bombardi, N. Lee, S.-W. Cheong, Phys. Rev. B 83, 104426 (2011)

Synchrotron X-ray diffraction study of BaFe2As2 and CaFe2As2 at high pressures up to 56 GPa: ambient and low-temperatures down to 33 K.
R. Mittal, S. K. Mishra, S. L. Chaplot, S. V. Ovsyannikov, E. Greenberg, D. M. Trots, L. Dubrovinsky, Y. Su, Th. Brueckel, S. Matsuishi, H. Hosono, G. Garbarino, Phys. Rev. B 83, 054503 (2011)

Possible magnetic order and suppression of superconductivity by V doping in Sr2VO3FeAs.
M. Tegel, T. Schmid, T. Stuerze, M. Egawa, Y. Su, A. Senyshyn, D. Johrendt, Phys. Rev. B 82, 140507(R) (2010)

Non-stoichiometry and the magnetic structure of Sr2CrO3FeAs.
M. Tegel, F. Hummel, Y. Su, T. Chatterji, M. Brunelli, and D. Johrendt, Europhy. Lett. 89, 37006 (2010)

Soft X-ray resonant scattering study of single-crystal LaSr2Mn2O7.
H.F. Li, Y. Su, T. Chatterji, A. Nefedov, J. Persson, P. Meuffels, Y. Xiao, Th. Brueckel, Eur. Phys. J. B 74, 457 (2010)

Field induced spin reorientation and giant spin-lattice coupling in EuFe2As2.
Y. Xiao, Y. Su, W. Schmidt, K. Schmalzl, C.M.N. Kumar, S. Price, T. Chatterji, R. Mittal, L.J. Chang, S. Nandi, N. Kumar, S.K. Dhar, A. Thamizhavel, Th. Brueckel, Phys. Rev. B 81, 220406 (R) (2010)

Magnetic structure of EuFe2As2 determined by single crystal neutron diffraction.
Y. Xiao, Y. Su, M. Meven, R. Mittal, C.M.N. Kumar, T. Chatterji, S. Price, J. Persson, N. Kumar, S.K. Dhar, A. Thamizhavel, and T. Brueckel, Phys. Rev. B 80, 174424 (2009)

The magnetic structure of EuFe2As2 determined by resonant x-ray scattering.
J. Herrero-Martín, V. Scagnoli, C. Mazzoli, Y. Su, R. Mittal, Y. Xiao, T. Brueckel, N. Kumar, S.K. Dhar, A. Thamizhavel, and L. Paolasini, Phys. Rev. B 80, 134411 (2009)

Antiferromagnetic ordering and structural phase transition in in BaFe2As2 with Sn incorporated from the growth flux.
Y. Su, P. Link, A. Schneidewind, Th. Wolf, P. Adelmann, Y. Xiao, M. Meven, R. Mittal, M. Rotter, D. Johrendt, Th. Brueckel, M. Loewenhaupt, Phys. Rev. B 79, 064504 (2009)

Measurement of anomalous phonon dispersion of CaFe2As2 single crystals using inelastic neutron scattering.
R. Mittal, L. Pintschovius, D. Lamago, R. Heid, K-P. Bohnen, D. Reznik, S. L. Chaplot, Y. Su, N. Kumar, S.K. Dhar, A. Thamizhavel, and Th. Brueckel, Phys. Rev. Lett., 102, 217001 (2009)

Ab initio lattice dynamics simulations and inelastic neutron scattering spectra for studying phonons in BaFe2As2: effect of structural phase transition, structural relaxation and magnetic ordering.
M. Zbiri, H. Schober, M.R. Johnson, S. Rols, R. Mittal, Y. Su, M. Rotter, D. Johrendt, Phys. Rev. B 79, 064511 (2009)

Inelastic neutron scattering and lattice-dynamical calculations of BaFe2As2.
R. Mittal, Y. Su, S. Rols, T. Chatterji, S. L. Chaplot, H. Schober, M. Rotter, D. Johrendt, and Th. Brueckel, Phys. Rev. B 78, 104514 (2008)