Publications 2012

Distinct Charge Orders in the Planes and Chains of Ortho-III-Ordered YBa₂Cu₃O_6+δ Superconductors Identified by Resonant Elastic X-ray Scattering
A. J. Achkar, R. Sutarto, X. Mao, F. He, A. Frañó, S. Blanco-Canosa, M. Le Tacon, G. Ghiringhelli, L. Braicovich, M. Minola, M. Moretti Sala, C. Mazzoli, R. Liang, D. A. Bonn, W. N. Hardy, B. Keimer, G. A. Sawatzky, and D. G. Hawthorn.
Phys. Rev. Lett. 109 (2012) 167001; published 17 October 2012

Evidence of a critical hole concentration in underdoped YBa₂Cu₃O_y single crystals revealed by ⁶³Cu NMR
S.-H. Baek, T. Loew, V. Hinkov, C. T. Lin, B. Keimer, B. Büchner, H.-J. Grafe
Phys. Rev. B 86 (2012) 220504(R); published 13 December 2012

Anomalous in-plane electronic scattering in charge ordered Na_0.41CoO₂∙0.6H₂O
G. Cao, M. M. Korshunov, Y. Gao, M. Le Tacon, D. J. Singh, C. T. Lin.
Phys. Rev. Lett. 108 (2012), 236401; published 6 June 2012

Nanoscale layering of antiferromagnetic and superconducting phases in Rb₂Fe₄Se₅
A. Charnukha, A. Cvitkovic, T. Prokscha, D. Pröpper, N. Ocelic, A. Suter, Z. Salman, E. Morenzoni, J. Deisenhofer, V. Tsurkan, A. Loidl, B. Keimer, A. V. Boris.
Phys. Rev. Lett. 109 (2012), 017003; published 5 July 2012

Optical conductivity of superconducting Rb₂Fe₄Se₅ single crystals
A. Charnukha, J. Deisenhofer, D. Propper, M. Schmidt, Z. Wang, Y. Goncharov, A. N. Yaresko, V. Tsurkan, B. Keimer, A. Loidl, A. V. Boris.
Phys. Rev. B 85 (2012), 100504(R); published 6 March 2012.

Strain-induced spin states in atomically ordered cobaltites
W. S. Choi, J.-H. Kwon, H. Jeen, J. E. Hamann-Borrero, A. Radi, S. Macke, R. Sutarto, F. He, G. A. Sawatzky, V. Hinkov, M. Kim, H. N. Lee.
Nano Lett. 12 (2012) 4966−4970; published 13 August 2012

Ruddlesden-Popper faults in LaNiO₃/LaAlO₃ superlattices
E. Detemple, Q. M. Ramasse, W. Sigle, G. Cristiani, H.-U. Habermeier, B. Keimer, P. A. van Aken.
J. Appl. Phys. 112 (2012), 013509; published 6 July 2012

Long-range transfer of electron-phonon coupling in oxide superlattices
N. Driza, S. Blanco-Canosa, M. Bakr, S. Soltan, M. Khalid, L. Mustafa, K. Kawashima, G. Christiani, H.-U. Habermeier, G. Khaliullin, C. Ulrich, M. Le Tacon, B. Keimer.
Nature Materials 11 (2012), 675; published 15 July 2012

Indications of weak electronic correlations in SrRuO3 from first-principles calculations
C. Etz, I. V. Maznichenko, D. Böttcher, J. Henk, A. N. Yaresko, W. Hergert, I. I. Mazin, I. Mertig, A. Ernst
Phys. Rev. B 86 (2012) 064441; published 30 August 2012

Roton-phonon interactions in superfluid ⁴He
B. Fåk, T. Keller, M. E. Zhitomirsky, A. L. Chernyshev.
Phys. Rev. Lett. 109 (2012), 155305; published 10 October 2012

Conformity of spin fluctuations in alkali-metal iron selenide superconductors inferred from the observation of a magnetic resonant mode in K_xFe_2-ySe₂
G. Friemel, W. P. Liu, E. A. Goremychkin, Y. Liu, J. T. Park, O. Sobolev, C. T. Lin, B. Keimer, D. S. Inosov.
EPL 99 (2012), 67004; published 18 September 2012

Resonant magnetic exciton mode in the heavy-fermion antiferromagnet CeB₆
G. Friemel, Yuan Li, A. V. Dukhnenko, N. Yu. Shitsevalova, N. E. Sluchanko, A. Ivanov, V. B. Filipov, B. Keimer, D. S. Inosov.
Nature Communications 3 (2012), 830; published 15 May 2012

Reciprocal-space structure and dispersion of the magnetic resonant mode in the superconducting phase of Rb_xFe_2−ySe₂ single crystals
G. Friemel, J. T. Park, T. A. Maier, V. Tsurkan, Yuan Li, J. Deisenhofer, H.-A. Krug von Nidda, A. Loidl, A. Ivanov, B. Keimer, D. S. Inosov.
Phys. Rev. B 85 (2012), 140511(R); published 20 April 2012

Long-range incommensurate charge fluctuations in (Y,Nd)Ba₂Cu₃O_6+x
G. Ghiringhelli, M. Le Tacon, M. Minola, S. Blanco-Canosa, C. Mazzoli, N. B. Brookes, G. M. De Luca, A. Frañó, D. G. Hawthorn, F. He, T. Loew, M. Moretti Sala, D. C. Peets, M. Salluzzo, E. Schierle, R. Sutarto, G. A. Sawatzky, E. Weschke, B. Keimer, L. Braicovich.
Science 337 (2012), 821−825; published 17 August 2012

Site-selective couplings in x-ray-detected magnetic resonance spectra of rare-earth-substituted yttrium iron garnets
J Goulon, A Rogalev, F Wilhelm, G Goujon, A Yaresko, Ch Brouder, J Ben Youssef.
New J. of Physics Vol.14 063001; published 1 June 2012

Thermoelectric properties of YBa₂Cu₃O₇−La_2/3Ca_1/3MnO₃ superlattices
S. Heinze, H.-U. Habermeier, G. Cristiani, S. Blanco Canosa, M. Le Tacon, B. Keimer.
Appl. Phys. Lett. 101 (2012) 131603; published 26 September 2012

Electronic superlattice revealed by resonant scattering from random impurities in Sr₃Ru₂O₇
M. A. Hossain, I. Zegkinoglou, Y.-D. Chuang, J. Geck, B. Bohnenbuck, A. G. Cruz Gonzalez, H.-H.Wu,C. Schu¨ßler-Langeheine, D.G. Hawthorn, J. D. Denlinger, R. Mathieu, Y. Tokura, S. Satow, H. Takagi, Y. Yoshida, Z. Hussain, B. Keimer, G. A. Sawatzky, A. Damascelli.
Phys. Rev. B 86 (2012) 134425; published 20 October 2012

Competition between d-wave and topological p-wave superconducting phases in the doped Kitaev-Heisenberg model
T. Hyart, A. R. Wright, G. Khaliullin, B. Rosenow.
Phys. Rev. B 85 (2012), 140510(R); published 16 April 2012

Mott versus Slater-type metal-insulator transition in Mn-substituted Sr₃Ru₂O₇
M. A. Hossain, B. Bohnenbuck, Y. D. Chuang, M. W. Haverkort, I. S. Elfimov, A. Tanaka, A. G. Cruz, Z. Hu, H.-J. Lin, C. T. Chen, R. Mathieu, Y. Tokura, Y. Yoshida, L. H. Tjeng, Z. Hussain, B. Keimer, G. A. Sawatzky, A. Damascelli.
Phys. Rev. B 86 (2012), 041102(R); published 9 July 2012

Emergent phenomena at oxide interfaces
H. Y. Hwang, Y. Iwasa, M. Kawasaki, B. Keimer, N. Nagaosa, Y. Tokura.
Nature Materials 11 (2012), 103−113 (review article); published 24 January 2012

Measuring electrical properties of thin film fuel cell electrodes by in situ infrared spectroscopy
J. H. Joo, R. Merkle, J.-H. Kim, J. Maier.
Adv. Mater., doi:10.1002/adma.201202934; published online 1 October 2012

Possible skyrmion-lattice ground state in the B20 chiral-lattice magnet MnGe as seen via small-angle neutron scattering
N. Kanazawa, J.-H. Kim, D. S. Inosov, J. S. White, N. Egetenmeyer, J. L. Gavilano, S. Ishiwata, Y. Onose, T. Arima, B. Keimer, Y. Tokura.
Phys. Rev. B 86 (2012) 134425; published 25 October 2012

Electronics: Electronic materials through time
B. Keimer, J. Maier, J. Mannhart.
Nature Materials 11 (2012), 751−752; published 23 August 2012

Konventionelle und unkonventionelle Supraleitung: Hundert Jahre Zweisamkeit
Bernhard Keimer.
Phys. Unserer Zeit 43 (2012), 128−135; published 2 May 2012

Large spin-wave energy gap for the bilayer iridate Sr₃Ir₂O₇: Evidence for enhanced dipolar interactions near the Mott metal-insulator transition
J. Kim, A. H. Said, D. Casa, M. H. Upton, T. Gog, M. Daghofer, G. Jackeli, J. van den Brink, G. Khaliullin, B. J. Kim.
Phys. Rev. Lett. 109 (2012), 157402; published 10 October 2012

Magnetic excitation spectra of Sr₂IrO₄ probed by resonant inelastic x-ray scattering: Establishing links to cuprate superconductors
J. Kim, D. Casa, M. H. Upton, T. Gog, Y.-J. Kim, J. F. Mitchell, M. van Veenendaal, M. Daghofer, J. van den Brink, G. Khaliullin, B. J. Kim.
Phys. Rev. Lett. 108 (2012), 177003; published 23 April 2012

Competing interactions at the interface between ferromagnetic oxides revealed by spin-polarized neutron reflectometry
J.-H. Kim, I. Vrejoiu, Y. Khaydukov, T. Keller, J. Stahn, A. Rühm, D. K. Satapathy, V. Hinkov, B. Keimer.
Phys. Rev. B 86 (2012) 180402(R); published 8 November 2012

Conventional superconductivity in SrPd₂Ge₂
T. K. Kim, A. N. Yaresko, V. B. Zabolotnyy, A. A. Kordyuk, D. V. Evtushinsky, N. H. Sung, B. K. Cho, T. Samuely, P. Szabó, J. G. Rodrigo, J. T. Park, D. S. Inosov, P. Samuely, B. Büchner, S. V. Borisenko.
Phys. Rev. B 85 (2012), 014520; published 25 January 2012

Dimensionality driven spin-flop transition in layered iridates
J. W. Kim, Y. Choi, J. Kim, J. F. Mitchell, G. Jackeli, M. Daghofer, J. van den Brink, G. Khaliullin, and B. J. Kim.
Phys. Rev. Lett. 109 (2012), 037204; published 17 July 2012

Magnetic couplings, optical spectra, and spin-orbit exciton in 5d electron Mott insulator Sr₂IrO₄
B. H. Kim, G. Khaliullin, B. I. Min.
Phys. Rev. Lett. 109 (2012) 167205; published 17 October 2012

Anharmonic suppression of charge density waves in 2H-NbS₂
M. Leroux, M. Le Tacon, M. Calandra, L. Cario, M-A. Méasson, P. Diener, E. Borrissenko, A. Bosak, P. Rodière.
Phys. Rev. B 86 (2012), 155125; published 12 October 2012

Feedback effect on high-energy magnetic fluctuations in the model high-temperature superconductor HgBa₂CuO_{4 + δ} observed by electronic Raman scattering
Yuan Li, M. Le Tacon, M. Bakr, D. Terrade, D. Manske, R. Hackl, L. Ji, M. K. Chan, N. Barišić, X. Zhao, M. Greven, B. Keimer.
Phys. Rev. Lett. 108 (2012), 227003; published 31 May 2012

Two Ising-like magnetic excitations in a single-layer cuprate superconductor
Yuan Li, G. Yu, M. K. Chan, V. Baledent, Y. Li, N. Barisic, X. Zhao, K. Hradil, R. A. Mole, Y. Sidis, P. Steffens, P. Bourges & M. Greven.
Nature Physics 8 (2012), 404–410; published online 18 March 2012

K_xFe_2-ySe₂ single crystals: Floating-zone growth, transport and structural properties
Y. Liu, Z. C. Li, W. P. Liu, G. Friemel, D. S. Inosov, R. E. Dinnebier, Z. J. Li, C. T. Lin.
Supercond. Sci. Technol. 25 (2012), 075001; published 17 May 2012

Infrared phonon anomalies and orbital ordering in single-crystalline MnV₂O₄ spinel
K. Myung-Whun, S. Y. Jang, T. Katsufuji, and A. V. Boris.
Phys. Rev. B 85 (2012), 224423; published 20 June 2012

Similar zone-center gaps in the low-energy spin-wave spectra of Na_1-δFeAs and BaFe₂As₂
J. T. Park, G. Friemel, T. Loew, V. Hinkov, Yuan Li, B. H. Min, D. L. Sun, A. Ivanov, A. Piovano, C. T. Lin, B. Keimer, Y. S. Kwon, D. S. Inosov.
Phys. Rev. B 86 (2012), 024437; published 27 July 2012

Floating zone growth of large single crystals of SrFeO_3-x
D. C. Peets, J.-H. Kim, M. Reehuis, P. Dosanjh, B. Keimer.
Journ. Cryst. Growth. 361 (2012), 201−205; published online 9 October 2012

Neutron diffraction study of spin and charge ordering in SrFeO_3−δ
M. Reehuis, C. Ulrich, A. Maljuk, Ch. Niedermayer, B. Ouladdiaf, A. Hoser, T. Hofmann, B. Keimer.
Phys. Rev. B 85 (2012), 184109; published 22 May 2012

Magnetic properties of PdAs₂O₆: A dilute spin system with an unusually high Néel temperature
M. Reehuis, T. Saha-Dasgupta, D. Orosel, J. Nuss, B. Rahaman, B. Keimer, O. K. Andersen, and M. Jansen.
Phys. Rev. B 85 (2012), 115118; published 23 March 2012

Magnetic Proximity Effect in YBa₂Cu₃O₇/La_2/3Ca_1/3MnO₃ and YBa₂Cu₃O₇/LaMnO_3+δ Superlattices
D. K. Satapathy, M. A. Uribe-Laverde, I. Marozau, V. K. Malik, S. Das, Th. Wagner, C. Marcelot, J. Stahn, S. Brück, A. Rühm, S. Macke, T. Tietze, E. Goering, A. Frañó, J.-H. Kim, M. Wu, E. Benckiser, B. Keimer, A. Devishvili, B. P. Toperverg, M. Merz, P. Nagel, S. Schuppler, C. Bernhard.
Phys. Rev. Lett. 108 (2012), 197201; published 7 May 2012

Formation and rotation of skyrmion crystal in the chiral-lattice insulator Cu₂OSeO₃
S. Seki, J.-H. Kim, D. S. Inosov, R. Georgii, B. Keimer, S. Ishiwata, and Y. Tokura.
Phys. Rev. B 85 (2012), 220406(R); published 22 June 2012

Exploring spin-orbital models with dipolar fermions in zigzag optical lattices
G. Sun, G. Jackeli, L. Santos, T. Vekua.
Phys. Rev. B 86 (2012) 155159; published 31 October 2012

Mn local moments prevent superconductivity in iron-pnictides Ba(Fe_1-xMn_x)₂As₂
Y. Texier, Y. Laplace, P. Mendels, J. T. Park, G. Friemel, D. L. Sun, D. S. Inosov, C. T. Lin, J. Bobroff.
EPL 99 (2012), 17002; published 2 July 2012

NMR study of the iron-selenide Rb_0.74Fe_1.6Se₂: Determination of the superconducting phase as iron vacancy-free Rb_0.3Fe₂Se₂
Y. Texier, J. Deisenhofer, V. Tsurkan, A. Loidl, D. S. Inosov, G. Friemel, J. Bobroff.
Phys. Rev. Lett. 108 (2012), 237002; published 8 June 2012

Anomalous dependence of the c-axis polarized Fe B_1g phonon mode with Fe and Se concentrations in Fe_1+yTe_1-xSe_x
Y. J. Um, A. Subedi, P. Toulemonde, A. Y. Ganin, L. Boeri, M. Rahlenbeck, Y. Liu, C. T. Lin, S. J. E. Carlsson, A. Sulpice, M. J. Rosseinsky, B. Keimer, M. Le Tacon.
Phys. Rev. B 85 (2012), 064519; published 27 February 2012

Raman Scattering Study of the Lattice Dynamics of Superconducting LiFeAs
Y. J. Um, J. T. Park, S. H. Jung, Y. J. Song, Y. S. Kwon, B. Keimer, M. Le Tacon.
Phys. Rev. B 85 (2012), 012501; published 12 January 2012

Dispersion of orbital excitations in 2D quantum antiferromagnets
K. Wohlfeld, M. Daghofer, G. Khaliullin, J. van den Brink.
J. Phys.: Conf. Ser. 391 (2012) 012168; published 14 December 2012

Pseudogap in the chain states of YBa₂Cu₃O_6.6
V. B. Zabolotnyy, A. A. Kordyuk, D. Evtushinsky, V. N. Strocov, L. Patthey, T. Schmitt, D. Haug, C. T. Lin, V. Hinkov, B. Keimer, B. Büchner, and S. V. Borisenko.
Phys. Rev. B 85 (2012), 064507; published 8 February 2012