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Modesti S, Petaccia L, Ceballos G, Vobornik I, Panaccione G, Rossi G, Ottaviano L, Larciprete R, Lizzit S, Goldoni A. Insulating ground state of Sn/Si(111)-(square root 3 x square root 3)R30 degrees. Phys Rev Lett 2007; 98:126401. [PMID: 17501138 DOI: 10.1103/physrevlett.98.126401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2006] [Indexed: 05/15/2023]
Abstract
The Sn/Si(111)-(square root 3 x square root 3)R30 degrees surface was so far believed to be metallic according to the electron counting argument. We show, by using tunneling spectroscopy, scanning tunneling microscopy, photoemission, and photoelectron diffraction, that below 70 K this surface has a very low density of states at the Fermi level and is not appreciably distorted. The experimental results are compatible with the insulating Mott-Hubbard ground state predicted by LSDA+U calculations [G. Profeta and E. Tosatti, Phys. Rev. Lett. 98, 086401 (2007)].
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Affiliation(s)
- S Modesti
- Laboratorio Nazionale TASC-INFM, S.S. 14 Km 163.5, 34012 Trieste, Italy
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Modesti S, Duca R, Finetti P, Ceballos G, Piccin M, Rubini S, Franciosi A. Microscopic mechanisms of self-compensation in Si delta-doped GaAs. Phys Rev Lett 2004; 92:086104. [PMID: 14995797 DOI: 10.1103/physrevlett.92.086104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2003] [Indexed: 05/24/2023]
Abstract
We combined systematic cross-sectional scanning tunneling microscopy and spectroscopy investigations with Hall measurements on single Si delta-doped layers, as well as Si delta-doped superlattices in GaAs. We found that Si self-compensation involves nucleation and growth of electrically neutral Si precipitates at the expense of the conventional donor Si phase.
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Affiliation(s)
- S Modesti
- Laboratorio Nazionale TASC-INFM, Area Science Park, S.S. 14, Km. 163.5, I-34012 Trieste, Italy
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Bianconi A, Modesti S, Campagna M, Fischer K, Stizza S. X-ray absorption near edge structures of intermediate valence TmSe single crystals. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/14/31/020] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Goldoni A, Modesti S, Dhanak VR, Sancrotti M, Santoni A. Evidence for three surface components in the 3d core-level photoemission spectra of Ge(100)-(2 x 1) surface. Phys Rev B Condens Matter 1996; 54:11340-11345. [PMID: 9984922 DOI: 10.1103/physrevb.54.11340] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Goldoni A, Cepek C, Modesti S. First-order orientational-disordering transition on the (111) surface of C60. Phys Rev B Condens Matter 1996; 54:2890-2895. [PMID: 9986145 DOI: 10.1103/physrevb.54.2890] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Cepek C, Goldoni A, Modesti S. Chemisorption and fragmentation of C60 on Pt(111) and Ni(110). Phys Rev B Condens Matter 1996; 53:7466-7472. [PMID: 9982196 DOI: 10.1103/physrevb.53.7466] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Fioretto D, Carlotti G, Socino G, Modesti S, Cepek C, Giovannini L, Donzelli O, Nizzoli F. Brillouin-scattering determination of the elastic constants of epitaxial fcc C60 film. Phys Rev B Condens Matter 1995; 52:R8707-R8710. [PMID: 9979932 DOI: 10.1103/physrevb.52.r8707] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Hunt MR, Modesti S, Rudolf P, Palmer RE. Charge transfer and structure in C60 adsorption on metal surfaces. Phys Rev B Condens Matter 1995; 51:10039-10047. [PMID: 9977679 DOI: 10.1103/physrevb.51.10039] [Citation(s) in RCA: 126] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Modesti S, Dhanak VR, Sancrotti M, Santoni A, Persson BN, Tosatti E. High temperature surface metallization of Ge(111) detected by electron energy loss spectroscopy. Phys Rev Lett 1994; 73:1951-1954. [PMID: 10056930 DOI: 10.1103/physrevlett.73.1951] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Gimzewski JK, Modesti S, Schlittler RR. Cooperative self-assembly of Au atoms and C60 on Au(110) surfaces. Phys Rev Lett 1994; 72:1036-1039. [PMID: 10056601 DOI: 10.1103/physrevlett.72.1036] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Gimzewski J, Modesti S, Gerber C, Schlittler R. Observation of a new Au ( 111 ) reconstruction at the interface of an adsorbed C60 overlayer. Chem Phys Lett 1993. [DOI: 10.1016/0009-2614(93)85153-f] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Rudolf P, Astaldi C, Bianco A, Modesti S. Ca chemisorption on Cu(100) in the submonolayer regime: Metastable and stable adsorption phases. Phys Rev B Condens Matter 1993; 47:4123-4126. [PMID: 10006548 DOI: 10.1103/physrevb.47.4123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Astaldi C, Bianco A, Modesti S, Tosatti E. Vibrational spectra of atomic H and D on Cu(110): Evidence for H quantum delocalization. Phys Rev Lett 1992; 68:90-93. [PMID: 10045120 DOI: 10.1103/physrevlett.68.90] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Ma Y, Rowe JE, Chaban EE, Chen CT, Headrick RL, Meigs GM, Modesti S, Sette F. Surface states and alkali-to-semiconductor charge transfer in the K/Si(111)( sqrt 3 x sqrt 3 )R(30 degrees )-B system. Phys Rev Lett 1990; 65:2173-2176. [PMID: 10042472 DOI: 10.1103/physrevlett.65.2173] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Chen CT, Sette F, Ma Y, Modesti S. Soft-x-ray magnetic circular dichroism at the L2,3 edges of nickel. Phys Rev B Condens Matter 1990; 42:7262-7265. [PMID: 9994861 DOI: 10.1103/physrevb.42.7262] [Citation(s) in RCA: 261] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Modesti S, Chen CT, Ma Y, Meigs G, Rudolf P, Sette F. Two-dimensional condensation of potassium on Ag(001). Phys Rev B Condens Matter 1990; 42:5381-5384. [PMID: 9996116 DOI: 10.1103/physrevb.42.5381] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Rudolf P, Astaldi C, Modesti S. Potassium- and sodium-induced phonons on the reconstructed and unreconstructed copper (110) surface studied by high-resolution electron-energy-loss spectroscopy. Phys Rev B Condens Matter 1990; 42:1856-1859. [PMID: 9995623 DOI: 10.1103/physrevb.42.1856] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Sette F, Wertheim GK, Ma Y, Meigs G, Modesti S, Chen CT. Lifetime and screening of the C 1s photoemission in graphite. Phys Rev B Condens Matter 1990; 41:9766-9770. [PMID: 9993353 DOI: 10.1103/physrevb.41.9766] [Citation(s) in RCA: 63] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Ma Y, Sette F, Meigs G, Modesti S, Chen CT. Breaking of ground-state symmetry in core-excited ethylene and benzene. Phys Rev Lett 1989; 63:2044-2047. [PMID: 10040748 DOI: 10.1103/physrevlett.63.2044] [Citation(s) in RCA: 58] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Modesti S. Exchange-excited f-f transitions in the electron-energy-loss spectra of rare-earth metals. Phys Rev B Condens Matter 1989; 40:933-941. [PMID: 9991912 DOI: 10.1103/physrevb.40.933] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Modesti S, Bocchetta CJ, Tosatti E, Paolucci G. Normal versus exchange inelastic electron scattering in metals: Theory and experiment. Phys Rev B Condens Matter 1987; 36:4503-4506. [PMID: 9943448 DOI: 10.1103/physrevb.36.4503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Modesti S, Paolucci G, Tosatti E. f-f excitations by resonant electron-exchange collisions in rare-earth metals. Phys Rev Lett 1985; 55:2995-2998. [PMID: 10032295 DOI: 10.1103/physrevlett.55.2995] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Fanfoni M, Modesti S, Motta N, Rosei R. Comparison between extended x-ray-absorption and extended electron energy-loss fine-structure results above the M2,3 edge of cobalt. Phys Rev B Condens Matter 1985; 32:7826-7829. [PMID: 9936954 DOI: 10.1103/physrevb.32.7826] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Modesti S, Valle FD, Rosei R, Tosatti E, Glazer J. Ferromagnetic Stoner excitations detected by electron-energy-loss spectroscopy. Phys Rev B Condens Matter 1985; 31:5471-5473. [PMID: 9936518 DOI: 10.1103/physrevb.31.5471] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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