000205333 001__ 205333
000205333 005__ 20181203023751.0
000205333 0247_ $$2doi$$a10.1103/PhysRevB.91.045114
000205333 022__ $$a1098-0121
000205333 02470 $$2ISI$$a000348156100002
000205333 037__ $$aARTICLE
000205333 245__ $$aProbing two- and three-dimensional electrons in MgB2 with soft x-ray angle-resolved photoemission
000205333 260__ $$bAmer Physical Soc$$c2015$$aCollege Pk
000205333 269__ $$a2015
000205333 300__ $$a6
000205333 336__ $$aJournal Articles
000205333 520__ $$aelectronic band structure of MgB2 involves a unique combination of two-and three-dimensional (3D) electrons derived from the boron sigma and pi states, respectively. We have mapped out the sigma and pi bands over the complete Brillouin zone, including the full disconnected Fermi surface, using high-resolution soft x-ray angle-resolved photoelectron spectroscopy. The measured band structure, which is closely related to that of graphene, is in overall good agreement with the density functional theory-general gradient approximation (DFT-GGA), though differences in Fermi surface volume are seen. Surprisingly, the measured bands are wider than calculated, by similar to 8% for the s and similar to 10-15% for the p bands. This solves the long-standing challenge of establishing the full 3D electronic structure of the model compound MgB2, and it demonstrates the tendency of DFT-GGA to overestimate the band narrowing due to exchange correlations effects.
000205333 700__ $$uETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland$$aSassa, Y.
000205333 700__ $$0247115$$g196483$$uEcole Polytech Fed Lausanne, Lab Quantum Magnetism, CH-1015 Lausanne, Switzerland$$aMansson, M.
000205333 700__ $$uPaul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland$$aKobayashi, M.
000205333 700__ $$aGotberg, O.
000205333 700__ $$uPaul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland$$aStrocov, V. N.
000205333 700__ $$uPaul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland$$aSchmitt, T.
000205333 700__ $$uETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland$$aZhigadlo, N. D.
000205333 700__ $$aTjernberg, O.
000205333 700__ $$uETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland$$aBatlogg, B.
000205333 773__ $$j91$$tPhysical Review B$$k4
000205333 909C0 $$xU11706$$0252200$$pLQM
000205333 909CO $$pSB$$particle$$ooai:infoscience.tind.io:205333
000205333 937__ $$aEPFL-ARTICLE-205333
000205333 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000205333 980__ $$aARTICLE