Electronic Structure Investigation of MAX-Phases by Soft X-ray Emission Spectroscopy

AbstractThe electronic structure of nanolaminate Ti2AlC and Ti2AlN thin films, so-called MAX-phases, were investigated by soft X-ray emission spectroscopy. These nanolaminated carbide and nitride compounds represent a class of layered materials with a combination of properties from both metals and ceramics. The bulk-sensitive soft X-ray emission technique is particularly useful for detecting detailed electronic structure information about internal monolayers and interfaces. The Ti-Al bonding is manifested by a pronounced peak in the Ti L-emission of Ti2AlC and Ti2AlN that is not present in the binary TiC system. The spectral shape of Al L-emission in the MAX-phase is strongly modified in comparison to metallic Al. By replacing or partly exchanging C with N, a change of the electron population can be achieved causing a change of covalent bonding between the laminated layers, which enables control of the material properties.

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Pressure dependence of the electronic structure of 4fand 3delectron systems studied by X-ray emission spectroscopy

High Pressure Research ◽

10.1080/08957959.2016.1203914 ◽

2016 ◽

Vol 36 (3) ◽

pp. 262-274 ◽

Cited By ~ 9

Author(s):

Hitoshi Yamaoka

Keyword(s):

Electronic Structure ◽

Pressure Dependence ◽

Emission Spectroscopy ◽

X Ray

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Electronic structure for the metal–insulator transition in La1−xSrxTiO3 probed by resonant soft-X-ray emission spectroscopy

Physica B Condensed Matter ◽

10.1016/j.physb.2004.06.039 ◽

2004 ◽

Vol 351 (3-4) ◽

pp. 310-312 ◽

Cited By ~ 1

Author(s):

T. Higuchi ◽

T. Tsukamoto ◽

Y. Taguchi ◽

Y. Tokura ◽

S. Shin

Keyword(s):

Electronic Structure ◽

Emission Spectroscopy ◽

Insulator Transition ◽

Metal Insulator Transition ◽

Metal Insulator ◽

X Ray

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Electronic structure of Mn in (Zn, Mn)O probed by resonant X-ray emission spectroscopy

Solid State Communications ◽

10.1016/j.ssc.2010.03.006 ◽

2010 ◽

Vol 150 (23-24) ◽

pp. 1065-1068 ◽

Cited By ~ 3

Author(s):

J. Jin ◽

G.S. Chang ◽

W. Xu ◽

Y.X. Zhou ◽

D.W. Boukhvalov ◽

...

Keyword(s):

Electronic Structure ◽

Emission Spectroscopy ◽

X Ray

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An examination of the electronic structure of SiO by soft x-ray emission spectroscopy

Solid State Communications ◽

10.1016/0038-1098(91)90582-g ◽

1991 ◽

Vol 77 (10) ◽

pp. 817-819 ◽

Cited By ~ 4

Author(s):

Tom Scimeca

Keyword(s):

Electronic Structure ◽

Emission Spectroscopy ◽

X Ray

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Electronic structure of nanostructured ZnO from x-ray absorption and emission spectroscopy and the local density approximation

Physical Review B ◽

10.1103/physrevb.70.195325 ◽

2004 ◽

Vol 70 (19) ◽

Cited By ~ 152

Author(s):

C. L. Dong ◽

C. Persson ◽

L. Vayssieres ◽

A. Augustsson ◽

T. Schmitt ◽

...

Keyword(s):

Electronic Structure ◽

Local Density Approximation ◽

Emission Spectroscopy ◽

Local Density ◽

Density Approximation ◽

Absorption And Emission ◽

X Ray ◽

X Ray Absorption ◽

Absorption And Emission Spectroscopy

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Molecular Scaffold Growth of Two-Dimensional, Strong Interlayer-Bonding-Layered Materials

CCS Chemistry ◽

10.31635/ccschem.019.20180003 ◽

2019 ◽

pp. 117-127 ◽

Cited By ~ 2

Author(s):

Mengqi Zeng ◽

Yunxu Chen ◽

Enze Zhang ◽

Jiaxu Li ◽

Rafael G. Mendes ◽

...

Keyword(s):

2D Materials ◽

Layered Materials ◽

Max Phase ◽

Future Application ◽

Two Dimensional ◽

Max Phases ◽

Molecular Scaffold ◽

Fundamental Properties ◽

Synthesis Strategy ◽

Interlayer Bonding

Currently, most two-dimensional (2D) materials that are of interest to emergent applications have focused on van der Waals–layered materials (VLMs) because of the ease with which the layers can be separated (e.g., graphene). Strong interlayer-bonding-layered materials (SLMs) in general have not been thoroughly explored, and one of the most critical present issues is the huge challenge of their preparation, although their physicochemical property transformation should be richer than VLMs and deserves greater attention. MAX phases are a classical kind of SLM. However, limited to the strong interlayer bonding, their corresponding 2D counterparts have never been obtained, nor has there been investigation of their fundamental properties in the 2D limitation. Here, the authors develop a controllable bottom-up synthesis strategy for obtaining 2D SLMs single crystal through the design of a molecular scaffold with Mo 2GaC, which is a typical kind of MAX phase, as an example. The superconducting transitions of Mo 2GaC at the 2D limit are clearly inherited from the bulk, which is consistent with Berezinskii–Kosterlitz–Thouless behavior. The authors believe that their molecular scaffold strategy will allow the fabrication of other high-quality 2D SLMs single crystals, which will further expand the family of 2D materials and promote their future application.

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