Now showing items 1-14 of 14

    • Carrier-density control of the SrTiO3 (001) surface 2DEG studied by ARPES 

      McKeown Walker, Siobhan Ellen; Bruno, Flavio Y; Wang, Zhiming; de la Torre, Alberto; Riccó, Sara; Tamai, Anna; Kim, Timur; Hoesch, Moritz; Shi, Ming; Bahramy, Mohammed Saeed; King, Phil; Baumberger, Felix (2015) - Journal article
      The origin of the 2D electron gas (2DEG)stabilized at the bare surface of SrTiO3 (001) is investigated. Using high-resolution angle-resolved photoemission and core-level spectroscopy, it is shown conclusively that this ...
    • Direct observation of spin-polarized bulk bands in an inversion-symmetric semiconductor 

      Riley, Jonathon Mark; Mazzola, F.; Dendzik, M.; Michiardi, M.; Takayama, T.; Bawden, Lewis; Granerød, C.; Leandersson, M.; Balasubramanian, T.; Hoesch, M.; Kim, T. K.; Takagi, H.; Meevasana, W.; Hofmann, Ph.; Bahramy, M. S.; Wells, J. W.; King, Phil (2014-11) - Journal article
      Methods to generate spin-polarized electronic states in non-magnetic solids are strongly desired to enable all-electrical manipulation of electron spins for new quantum devices1. This is generally accepted to require ...
    • The dynamics of ultraviolet-induced oxygen vacancy at the surface of insulating SrTiO3(001) 

      Suwanwong, S; Eknapakul, T; Rattanachai, Y; Masingboon, C; Rattanasuporn, S; Pattanakun, R; Nakajima, H; King, Phil; Hodak, S K; Meevasana, Worawat (2015-11-15) - Journal article
      The effect of ultra-violet (UV) irradiation on the electronic structure and the surface resistance of an insulating SrTiO3(001) crystal is studied in this work. Upon UV irradiation, we shows that the two-dimensional electron ...
    • Formation of heavy d-electron quasiparticles in Sr3Ru2O7 

      Allan, Milan Peter; Tamai, Anna; Rozbicki, Emil Jerzy; Fischer, M. H.; Voss, J.; King, Phil; Meevasana, Worawat; Thirupathaiah, S.; Rienks, E.; Fink, J.; Tennant, David Alan; Perry, Robin Stuart; Mercure, Jean-Francois; Wang, M. A.; Lee, Jinho; Fennie, C. J.; Kim, E-A; Lawler, M. J.; Shen, K. M.; Mackenzie, Andrew; Shen, Z-X; Baumberger, Felix (2013-06-20) - Journal article
      The phase diagram of Sr3Ru2O7 shows hallmarks of strong electron correlations despite the modest Coulomb interaction in the Ru 4d shell. We use angle-resolved photoelectron spectroscopy measurements to provide microscopic ...
    • Hierarchical spin-orbital polarisation of a giant Rashba system 

      Bawden, Lewis; Riley, Jonathon Mark; Kim, C. H.; Sankar, R.; Monkman, E.J.; Shai, D.E.; Wei, H.I.; Lochocki, E.; Wells, J.W.; Meevasana, W.; Kim, T.K.; Hoesch, M.; Ohtsubo, Y.; Le Fevre, P.; Fennie, C.J.; Shen, K.M.; Chou, F.C.; King, Phil (2015-09-25) - Journal article
      The Rashba effect is one of the most striking manifestations of spin-orbit coupling in solids and provides a cornerstone for the burgeoning field of semiconductor spintronics. It is typically assumed to manifest as a ...
    • Large tunable Rashba spin splitting of a two-dimensional electron gas in Bi2Se3 

      King, Phil; Hatch, R. C.; Bianchi, M.; Ovsyannikov, R.; Lupulescu, C.; Landolt, G.; Slomski, B.; Dil, J. H.; Guan, D.; Mi, J. L.; Rienks, E. D. L.; Fink, J.; Lindblad, A.; Svensson, S.; Bao, S.; Balakrishnan, G.; Iversen, B. B.; Osterwalder, J.; Eberhardt, W.; Baumberger, Felix; Hofmann, Ph. (2011-08-25) - Journal article
      We report a Rashba spin splitting of a two-dimensional electron gas in the topological insulator Bi2Se3 from angle-resolved photoemission spectroscopy. We further demonstrate its electrostatic control, and show that spin ...
    • Nearly-free electrons in a 5d delafossite oxide metal 

      Kushwaha, Pallavi; Sunko, Veronika; Moll, P.J.W.; Bawden, Lewis; Riley, Jonathon Mark; Nandi, Nabhanila; Rosner, H.; Schmidt, M.P.; Arnold, F.; Hassinger, E.; Kim, T.K.; Hoesch, M.; Mackenzie, Andrew; King, Phil (2015-10-23) - Journal article
      Understanding the role of electron correlations in strong spin-orbit transition-metal oxides is key to the realization of numerous exotic phases including spin-orbit–assisted Mott insulators, correlated topological solids, ...
    • Negative electronic compressibility and tunable spin splitting in WSe2 

      Riley, Jonathon Mark; Meevasana, Worawat; Bawden, Lewis; Asakawa, M.; Takayama, T.; Eknapakul, T.; Kim, T.K.; Hoesch, M.; Mo, S.-K.; Takagi, H.; Sasagawa, T.; Bahramy, M.S.; King, Phil (2015-12) - Journal item
      Tunable bandgaps1, extraordinarily large exciton-binding energies2, 3, strong light–matter coupling4 and a locking of the electron spin with layer and valley pseudospins5, 6, 7, 8 have established transition-metal ...
    • Observation of ultrafast free carrier dynamics in single layer MoS2 

      Cabo, Antonija; Miwa, Jill; Grønborg, Signe; Riley, Jonathon Mark; Johannsen, Jens; Cacho, Cephise; Alexander, Oliver; Chapman, Richard; Springate, Emma; Grioni, Marco; Lauritsen, Jeppe; King, Phil; Hofmann, Philip; Ulstrup, Søren (2015-09-09) - Journal item
      The dynamics of excited electrons and holes in single layer (SL) MoS2 have so far been difficult to disentangle from the excitons that dominate the optical response of this material. Here, we use time- and angle-resolved ...
    • Quantifying electronic correlation strength in a complex oxide: a combined DMFT and ARPES study of LaNiO3 

      Nowadnick, E. A.; Ruf, J. P.; Park, H.; King, Phil; Schlom, D. G.; Shen, K. M.; Millis, A. J. (2015-12-15) - Journal article
      The electronic correlation strength is a basic quantity that characterizes the physical properties of materials such as transition metal oxides. Determining correlation strengths requires both precise definitions and a ...
    • Spectroscopic indications of polaronic behavior of the strong spin-orbit insulator Sr3Ir2O7 

      King, Phil; Takayama, T.; Tamai, Anna; Rozbicki, Emil Jerzy; McKeown Walker, Siobhan Ellen; Shi, M.; Patthey, L.; Moore, R.G.; Lu, D.; Shen, K. M.; Takagi, H.; Baumberger, Felix (2013-06-24) - Journal article
      We investigate the bilayer Ruddlesden-Popper iridate Sr3Ir2O7 by temperature-dependent angle-resolved photoemission. At low temperatures, we find a fully gapped correlated insulator, characterized by a small charge gap and ...
    • A spin- and angle-resolved photoemission study of coupled spin-orbital textures driven by global and local inversion symmetry breaking 

      Bawden, Lewis (University of St Andrews, 2017-09-21) - Thesis
      The effect of spin-orbit coupling had once been thought to be a minor perturbation to the low energy band structure that could be ignored. Instead, a surge in recent theoretical and experimental efforts have shown spin-orbit ...
    • Title redacted 

      Riley, Jonathon M. (University of St Andrews, 2017) - Thesis
    • Tunable carrier multiplication and cooling in graphene 

      Johannsen, J.C.; Ulstrup, S.; Crepaldi, A.; Cilento, F.; Zacchigna, M.; Miwa, J.A.; Cacho, C.; Chapman, R.T.; Springate, E.; Fromm, F.; Raidel, C.; Seyller, T.; King, Phil; Parmigiani, F.; Grioni, M.; Hofmann, P. (2015-01-14) - Journal article
      Time- and angle-resolved photoemission measurements on two doped graphene samples displaying different doping levels reveal remarkable differences in the ultrafast dynamics of the hot carriers in the Dirac cone. In the ...