Electronic structure and properties of BaAIGe and SrAlGe

S. J. Youn; A. J. Freeman

doi:10.1016/j.physc.2012.02.017

Electronic structure and properties of BaAIGe and SrAlGe

S. J. Youn^*, A. J. Freeman

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

The electronic structures of BaAlGe and SrAlGe which are superconductors with hexagonal honeycomb layers have been studied by using a first principles method. Energy bands, Fermi surfaces, and density of states are presented. The two materials have topologically different Fermi surfaces. BaAlGe has two Fermi surfaces: one has a three dimensional spinning-top-like shape and the other has a cylindrical shape with two dimensional character. SrAlGe has only one connected Fermi surface. Two gap superconductivity for BaAlGe is suggested from the inherently different character of the two Fermi surfaces. The higher T _c of SrAlGe than BaAlGe is related to the difference in both the topology of the Fermi surface and the band dispersions along the z direction.

Original language	English (US)
Pages (from-to)	54-58
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	476
DOIs	https://doi.org/10.1016/j.physc.2012.02.017
State	Published - Jun 2012

Keywords

BaAlGe
Electronic structure
Fermi surface
SrAlGe

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/j.physc.2012.02.017

Cite this

@article{45960d3c1f3e4b5e8d9a0717c84e0a5d,

title = "Electronic structure and properties of BaAIGe and SrAlGe",

abstract = "The electronic structures of BaAlGe and SrAlGe which are superconductors with hexagonal honeycomb layers have been studied by using a first principles method. Energy bands, Fermi surfaces, and density of states are presented. The two materials have topologically different Fermi surfaces. BaAlGe has two Fermi surfaces: one has a three dimensional spinning-top-like shape and the other has a cylindrical shape with two dimensional character. SrAlGe has only one connected Fermi surface. Two gap superconductivity for BaAlGe is suggested from the inherently different character of the two Fermi surfaces. The higher T c of SrAlGe than BaAlGe is related to the difference in both the topology of the Fermi surface and the band dispersions along the z direction.",

keywords = "BaAlGe, Electronic structure, Fermi surface, SrAlGe",

author = "Youn, {S. J.} and Freeman, {A. J.}",

note = "Funding Information: SJY acknowledges the sabbatical research Grant by Gyeongsang National University. AJF is supported by the Department of Energy (DE-FG02-88ER45382).",

year = "2012",

month = jun,

doi = "10.1016/j.physc.2012.02.017",

language = "English (US)",

volume = "476",

pages = "54--58",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

}

TY - JOUR

T1 - Electronic structure and properties of BaAIGe and SrAlGe

AU - Youn, S. J.

AU - Freeman, A. J.

N1 - Funding Information: SJY acknowledges the sabbatical research Grant by Gyeongsang National University. AJF is supported by the Department of Energy (DE-FG02-88ER45382).

PY - 2012/6

Y1 - 2012/6

N2 - The electronic structures of BaAlGe and SrAlGe which are superconductors with hexagonal honeycomb layers have been studied by using a first principles method. Energy bands, Fermi surfaces, and density of states are presented. The two materials have topologically different Fermi surfaces. BaAlGe has two Fermi surfaces: one has a three dimensional spinning-top-like shape and the other has a cylindrical shape with two dimensional character. SrAlGe has only one connected Fermi surface. Two gap superconductivity for BaAlGe is suggested from the inherently different character of the two Fermi surfaces. The higher T c of SrAlGe than BaAlGe is related to the difference in both the topology of the Fermi surface and the band dispersions along the z direction.

AB - The electronic structures of BaAlGe and SrAlGe which are superconductors with hexagonal honeycomb layers have been studied by using a first principles method. Energy bands, Fermi surfaces, and density of states are presented. The two materials have topologically different Fermi surfaces. BaAlGe has two Fermi surfaces: one has a three dimensional spinning-top-like shape and the other has a cylindrical shape with two dimensional character. SrAlGe has only one connected Fermi surface. Two gap superconductivity for BaAlGe is suggested from the inherently different character of the two Fermi surfaces. The higher T c of SrAlGe than BaAlGe is related to the difference in both the topology of the Fermi surface and the band dispersions along the z direction.

KW - BaAlGe

KW - Electronic structure

KW - Fermi surface

KW - SrAlGe

UR - http://www.scopus.com/inward/record.url?scp=84858731442&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84858731442&partnerID=8YFLogxK

U2 - 10.1016/j.physc.2012.02.017

DO - 10.1016/j.physc.2012.02.017

M3 - Article

AN - SCOPUS:84858731442

SN - 0921-4534

VL - 476

SP - 54

EP - 58

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

ER -

Electronic structure and properties of BaAIGe and SrAlGe

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this