000200991 001__ 200991
000200991 005__ 20180317093408.0
000200991 0247_ $$2doi$$a10.1103/PhysRevLett.113.086801
000200991 022__ $$a1079-7114
000200991 02470 $$2ISI$$a000341292300010
000200991 037__ $$aARTICLE
000200991 245__ $$aMixed Dimensionality of Confined Conducting Electrons in the Surface Region of SrTiO3
000200991 260__ $$aCollege Pk$$bAmer Physical Soc$$c2014
000200991 269__ $$a2014
000200991 300__ $$a5
000200991 336__ $$aJournal Articles
000200991 520__ $$aUsing angle-resolved photoemission spectroscopy, we show that the recently discovered surface state on SrTiO3 consists of nondegenerate t(2g) states with different dimensional characters. While the d(xy) bands have quasi-2D dispersions with weak k(z) dependence, the lifted d(xz)/d(yz) bands show 3D dispersions that differ significantly from bulk expectations and signal that electrons associated with those orbitals permeate the near-surface region. Like their more 2D counterparts, the size and character of the d(xz)/d(yz) Fermi surface components are essentially the same for different sample preparations. Irradiating SrTiO3 in ultrahigh vacuum is one method observed so far to induce the "universal" surface metallic state. We reveal that during this process, changes in the oxygen valence band spectral weight that coincide with the emergence of surface conductivity are disproportionate to any change in the total intensity of the O 1s core level spectrum. This signifies that the formation of the metallic surface goes beyond a straightforward chemical doping scenario and occurs in conjunction with profound changes in the initial states and/or spatial distribution of near-E-F electrons in the surface region.
000200991 700__ $$aPlumb, N. C.
000200991 700__ $$aSalluzzo, M.
000200991 700__ $$aRazzoli, E.
000200991 700__ $$aMånsson, M.
000200991 700__ $$aFalub, M.
000200991 700__ $$aKrempasky, J.
000200991 700__ $$aMatt, C. E.
000200991 700__ $$0246465$$aChang, Johan Juul$$g209411
000200991 700__ $$aSchulte, M.
000200991 700__ $$aBraun, J.
000200991 700__ $$aEbert, H.
000200991 700__ $$aMinár, J.
000200991 700__ $$aDelley, B.
000200991 700__ $$aZhou, K.-J.
000200991 700__ $$aSchmitt, T.
000200991 700__ $$aShi, M.
000200991 700__ $$0244695$$aMesot, Joël$$g185424
000200991 700__ $$aPatthey, L.
000200991 700__ $$aRadović, M.
000200991 773__ $$j113$$k8$$tPhysical Review Letters
000200991 909CO $$ooai:infoscience.tind.io:200991$$particle
000200991 909C0 $$0252441$$pICMP$$xU10138
000200991 917Z8 $$x209411
000200991 937__ $$aEPFL-ARTICLE-200991
000200991 973__ $$aOTHER$$rNON-REVIEWED$$sPUBLISHED
000200991 980__ $$aARTICLE