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Recent Publications

Kitaev physics in RuCl3

    1. Phase Diagram of α-RuCl3 in an in-plane Magnetic Field, J. A. Sears, Y. Zhao, Z. Xu, J. W. Lynn, and Young-June Kim, Phys. Rev. B 95, 180411(R) - Editor’s suggestion

    2. ARPES study of the Kitaev Candidate alpha-RuCl3, Xiaoqing Zhou, Haoxiang Li, J. A. Waugh, S. Parham, Heung-Sik Kim, J. A. Sears, A. Gomes, Hae-Young Kee, Young-June Kim, and D. S. Dessau, Phys. Rev. B 94, 161106 (2016).

    3. Orbital excitations in the 4d spin-orbit coupled Mott insulator a-RuCl3, Luke J. Sandilands, Yao Tian, Anjan A. Reijnders, Heung-Sik Kim, K.W. Plumb, Hae-Young Kee, Young-June Kim, Kenneth S. Burch, Phys. Rev. B 93, 075144 (2016).

    4. Magnetic order in a-RuCl3: a honeycomb lattice quantum magnet with strong spin-orbit coupling, J. A. Sears, M. Songvilay, K. W. Plumb, J. P. Clancy, Y. Qiu, Y. Zhao, D. Parshall, and Young-June Kim, Phys. Rev. B, 91, 144420 (2015).

    5. Scattering Continuum and Possible Fractionalized Excitations in a-RuCl3, L.J. Sandilands, Y. Tian, K.W. Plumb, Young-June Kim, and K. S. Burch, Phys. Rev. Lett. 114, 147201 (2015).

    6. alpha-RuCl3: a spin-orbit assisted Mott insulator on a honeycomb lattice, K. W. Plumb, J. P. Clancy, L. Sandilands, V. Vijay Shankar, Y. F. Hu, K. S. Burch, Hae-Young Kee, and Young-June Kim, Phys. Rev. B 90, 041112(R) (2014).

     

    Spin-orbit physics in iridates

      1. Tuning Magnetic Coupling in Sr2IrO4 Thin Films with Epitaxial Strain, A. Lupascu, J. P. Clancy, H. Gretarsson, Zixin Nie, J. Nichols, J. Terzic, G. Cao, S. S. A. Seo, Z. Islam, M. H. Upton, Jungho Kim, A. H. Said, D. Casa, T. Gog, Vamshi M. Katukuri, L. Hozoi, H. Stoll, J. van den Brink, and Young-June Kim, Phys. Rev. Lett. 112, 147201 (2014).
      2. Dilute magnetism and spin-orbital percolation effects in Sr2Ir1−xRhxO4, J. P. Clancy, A. Lupascu, H. Gretarsson, Z. Islam, Y. F. Hu, D. Casa, C. S. Nelson, S. C. LaMarra, G. Cao, and Young-June Kim, Phys. Rev. B 89, 054409 (2014).
      3. Longer-range lattice anisotropy strongly competing with spin-orbit interactions in pyrochlore iridates, L. Hozoi, H. Gretarsson, J. P. Clancy, B.-G. Jeon, B. Lee, K. H. Kim, V. Yushankhai, Peter Fulde, D. Casa, T. Gog, Jungho Kim, A. H. Said, M. H. Upton, Young-June Kim, and Jeroen van den Brink, Phys. Rev. B 89, 115111 (2014).
      4. Magnetic excitation spectrum of Na2IrO3 probed by RIXS, H. Gretarsson, J. P. Clancy, Yogesh Singh, P. Gegenwart, Jungho Kim, M. H. Upton,  A. H. Said, D. Casa, T. Gog, and Young-June Kim, Phys. Rev. B 87, 220407(R) (2013)
      5. Crystal field splitting and correlation effect on the electronic structure of A2IrO3, H. Gretarsson, J. P. Clancy, X. Liu, J. P. Hill, Emil Bozin, Yogesh Singh, S. Manni, P. Gegenwart, Jungho Kim, A. H. Said, D. Casa, T. Gog, M. H. Upton, Heung-Sik Kim, J. Yu, Vamshi M. Katukuri, L. Hozoi, Jeroen van den Brink, and Young-June Kim, ” Phys. Rev. Lett. 110, 076402 (2013).
      6. Spin-Orbit Coupling in Iridium-Based 5d Compounds Probed by X-ray Absorption Spectroscopy, J.P. Clancy, N. Chen, C.Y. Kim, W.F. Chen, K.W. Plumb, B.C. Jeon, T.W. Noh, and Young-June Kim, Phys. Rev. B, 86, 195132 (2012).
      7. Magnetic Excitation Spectra of Sr2IrO4 Probed by Resonant Inelastic X-Ray Scattering: Establishing Links to Cuprate Superconductors, Jungho Kim, D. Casa, M. H. Upton, T. Gog, Young-June Kim, J. F. Mitchell, M. van Veenendaal, M. Daghofer, J. van den Brink, G. Khaliullin, and B. J. Kim, Phys. Rev. Lett. 108, 177003 (2012).

      Elementary excitations in quantum magnets

      Superconductivity in iron based materials

      1. Structural origin of the anomalous temperature dependence of the local magnetic moments in the CaFe2As2 family of materials, L. Ortenzi, H. Gretarsson, S. Kasahara, Y. Matsuda, T. Shibauchi, K. D. Finkelstein, W. Wu, S. R. Julian, Young-June Kim, I. I. Mazin, and L. Boeri, Phys. Rev. Lett. 114, 047001 (2015).
      2. Spin-state transition in the Fe-pnictides, H. Gretarsson, S.R. Saha, T. Drye, J. Paglione, Jungho Kim, D. Casa, T. Gog, W. Wu, S. R. Julian, and Young-June Kim,  Phys. Rev. Lett. 110, 047003(2013).
      3. Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy, H. Gretarsson, A. Lupascu, Jungho Kim, D. Casa, T. Gog, W. Wu, S. R. Julian, Z. J. Xu, J. S. Wen, G. D. Gu, R. H. Yuan, Z. G. Chen, N.-L. Wang, S. Khim, K. H. Kim, M. Ishikado, I. Jarrige, S. Shamoto, J.-H. Chu, I. R. Fisher, Young-June Kim, Phys. Rev. B 84, 100509 (2011).
      4. Resonant inelastic x-ray scattering study of electronic excitations in insulating K0.83Fe1.53Se2, H. Gretarsson, T. Nomura, I. Jarrige, A. Lupascu, M. H. Upton, Jungho Kim, D. Casa, T. Gog, R. H. Yuan, Z. G. Chen, N.-L. Wang, and Young-June Kim, Phys. Rev. B, 91, 245118 (2015).
      5. Resonant inelastic x-ray scattering study of charge excitations in superconducting and nonsuperconducting PrFeAsO1−y, I. Jarrige, T. Nomura, K. Ishii, H. Gretarsson, Y.-J. Kim, J. Kim, M. Upton, D. Casa, T. Gog, M. Ishikado, T. Fukuda, M. Yoshida, J.P. Hill, X. Liu, N. Hiraoka, K.D. Tsuei, and S. Shamoto, Phys. Rev. B 86, 115104 (2012).
      6. Sudden reversal in the pressure dependence of Tc in the iron-based superconductor CsFe2As2: A possible link between  scattering and pairing symmetry, F. F. Tafti, J. P. Clancy, M. Lapointe-Major, C. Collignon, S. Faucher, J. Sears, A. Juneau-Fecteau, N. Doiron-Leyraud, A. F. Wang, X. G. Luo, S. Desgreniers, Young-June Kim, X. H. Chen, and Louis Taillefer, Phys. Rev. B. 89 134502(2014).

      7. Avoided quantum criticality and magnetoelastic coupling in BaFe2−xNixAs2, Xingye Lu, H. Gretarsson, Rui Zhang, Xuerong Liu, Huiqian Luo, Wei Tian, Mark Laver, Z. Yamani, Young-June Kim, A. H. Nevidomskyy, Qimiao Si, and Pengcheng Dai, Phys. Rev. Lett. 110, 257001 (2013).

       

      Two-dimensional quantum materials

      1. Structural study of Bi2Sr2CaCu2O8+δ exfoliated nanocrystals, A. Lupascu, Renfei Feng, L. J. Sandilands, Zixin Nie, V. Baydina, Genda Gu, Shimpei Ono, Yoichi Ando, D. C. Kwok, N. Lee, S.-W. Cheong, K. S. Burch, and Young-June Kim, Appl. Phys. Lett. 101, 223106 (2012).