| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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In Situ Electronic Structure Study of Epitaxial Niobium Thin Films by Angle-Resolved Photoemission Spectroscopy |
| Pai Xiang1, Ji-Shan Liu1,2,3**, Ming-Ying Li1, Hai-Feng Yang1, Zheng-Tai Liu1, Cong-Cong Fan1, Da-Wei Shen 1,2,3**, Zhen Wang1,2,3, Zhi Liu1,2,3,4 |
1State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050
2CAS Center for Excellence in Superconducting Electronics, Shanghai 200050
3CAS-Shanghai Science Research Center, Shanghai 201203
4Division of Photon Science and Condensed Matter Physics, School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031
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| Cite this article: |
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Pai Xiang, Ji-Shan Liu, Ming-Ying Li et al 2017 Chin. Phys. Lett. 34 077402 |
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Abstract High-quality single crystalline niobium films are grown on a-plane sapphire in molecular beam epitaxy. The film is single crystalline with a (110) orientation, and both the rocking curve and the reflection high-energy electron diffraction pattern demonstrate its high-quality with an atomically smooth surface. By in situ study of its electronic structure, a rather weak electron-electron correlation effect is demonstrated experimentally in this $4d$ transition metal. Moreover, a kink structure is observed in the electronic structure, which may result from electron-phonon interaction and it might contribute to the superconductivity. Our results help to understand the properties of niobium deeply.
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Received: 13 March 2017
Published: 23 June 2017
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| PACS: |
74.70.Xa
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(Pnictides and chalcogenides)
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74.25.Jb
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(Electronic structure (photoemission, etc.))
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79.60.-i
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(Photoemission and photoelectron spectra)
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| Fund: Supported by the National Key Research and Development Program of China under Grant No 2016YFA0300204, the National Natural Science Foundation of China under Grant Nos 11274332, 11574337, 11404360 and 11227902, the Natural Science Foundation of Shanghai under Grant No 14ZR1447600, the Strategic Priority Research Program (B) of the Chinese Academy of Sciences under Grant No XDB04040300, and the Youth Innovation Promotion Association CAS. |
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| [1] | Hawkins G and Clarke J 1976 J. Appl. Phys. 47 1616 | | [2] | Fawcett E, Reed W A and Soden R R 1967 Phys. Rev. 159 533 | | [3] | Burgemeister E A, Bosschieter J E and Dokoupil Z 1974 Phys. Lett. A 47 27 | | [4] | Karim D P, Ketterson J B and Crabtree G W 1978 J. Low Temp. Phys. 30 389 | | [5] | Mattheiss L F 1970 Phys. Rev. B 1 373 | | [6] | Marksteiner P, Weinberger P, Neckel A et al 1986 Phys. Rev. B 33 6709 | | [7] | Li Y, An B, Fukuyama S et al 2002 Mater. Characterization 48 163 | | [8] | Singh D J and Nordstrom L 2006 Planewaves, Pseudopotentials and the LAPW Method (Berlin: Springer-Verlag) 2nd edn p 1C134 | | [9] | Blaha P, Schwarz K, Madsen G, Kvasnicka D and Luitz J 2001 {in WIEN2K, An Augmented PlaneWave+Local Orbitals Program for Calculating Crystal Properties} (Austria: Technical Univievsity Wien) | | [10] | Perdew J P, Burke K and Ernzerhof M 1996 Phys. Rev. Lett. 77 3865 | | [11] | Wildes A R, Mayer J and Theis-Br?hl K 2001 Thin Solid Films 401 7–34 | | [12] | Ward R C C, Grier E J and Petford-Long A K 2003 J. Mater. Sci.: Mater. Electron. 14 533 | | [13] | Li Y S, Zheng M, Mulcahy B et al 2011 Appl. Phys. Lett. 99 042507 | | [14] | Jin Y R, Song X H and Zhang D L 2009 Sci. Chin. Ser. G: Phys. Mech. Astron. 52 1289 | | [15] | Yoshii K, Yamamoto H, Saiki K et al 1995 Phys. Rev. B 52 13570 | | [16] | Krishnan M, Valderrama E, Bures B et al 2011 Supercond. Sci. Technol. 24 115002 | | [17] | Splett J D, Vecchia D F and Goodrich L F 2011 J. Res. Natl. Inst. Stand. Technol. 116 489 | | [18] | Anderson J R, Mccaffrey J W and Schirber J E 1973 Phys. Rev. B 7 5115 | | [19] | Chakraborty B, Pickett W E and Allen P B 1976 Phys. Rev. B 14 3227 | | [20] | Miller J N, Lindau I, Stefan P M et al 1982 J. Appl. Phys. 53 3267 | | [21] | Chainani A, Yokoya T, Kiss T et al 2000 Phys. Rev. Lett. 85 1966 | | [22] | Liu M, Chang C Z, Zhang Z et al 2011 Phys. Rev. B 83 165440 | | [23] | Rahn D J, Hellmann S, Kall?ne M et al 2012 Phys. Rev. B 85 224532 | | [24] | Shai D E, Adamo C, Shen D W et al 2013 Phys. Rev. Lett. 110 087004 | | [25] | Byczuk K, Kollar M, Held K et al 2007 Nat. Phys. 3 168 | | [26] | Rotenberg E, Schaefer J and Kevan S D 2000 Phys. Rev. Lett. 84 2925 | | [27] | Valla T, Fedorov A V, Johnson P D et al 1999 Phys. Rev. Lett. 83 2085 |
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