Large displacement of germanium atoms in crystalline Ge2 Sb2 Te5

S. Shamoto; N. Yamada; T. Matsunaga; Th Proffen; J. W. Richardson; J. H. Chung; T. Egami

doi:10.1063/1.1861976

Large displacement of germanium atoms in crystalline Ge2 Sb2 Te5

S. Shamoto
, N. Yamada
, T. Matsunaga
, Th Proffen
, J. W. Richardson
, J. H. Chung
, T. Egami

物理學系

研究成果: Article › 同行評審

60 引文斯高帕斯（Scopus）

摘要

Local structure of NaCl-type crystalline Ge2 Sb2 Te5 has been studied by the atomic pair distribution function analysis of pulsed neutron powder diffraction data. We have found the large displacement of germanium atoms in this crystalline phase. Usually, such a large lattice distortion has disadvantages for the electric conductivity. The electronic band structure, however, implies that this significant distortion in addition to the lattice defect at Na site reduces only thermal conductivity, while the highly ordered tellurium atoms at Cl site keep high electric conductivity.

原文	English
文章編號	081904
頁（從 - 到）	1-3
頁數	3
期刊	Applied Physics Letters
卷	86
發行號	8
DOIs	https://doi.org/10.1063/1.1861976
出版狀態	Published - 2005 2月 21

All Science Journal Classification (ASJC) codes

物理與天文學（雜項）

存取文件

10.1063/1.1861976

其它文件與鏈接

引用此

@article{0452c6ca4a464fd2a833703094887a88,

title = "Large displacement of germanium atoms in crystalline Ge2 Sb2 Te5",

abstract = "Local structure of NaCl-type crystalline Ge2 Sb2 Te5 has been studied by the atomic pair distribution function analysis of pulsed neutron powder diffraction data. We have found the large displacement of germanium atoms in this crystalline phase. Usually, such a large lattice distortion has disadvantages for the electric conductivity. The electronic band structure, however, implies that this significant distortion in addition to the lattice defect at Na site reduces only thermal conductivity, while the highly ordered tellurium atoms at Cl site keep high electric conductivity.",

author = "S. Shamoto and N. Yamada and T. Matsunaga and Th Proffen and Richardson, \{J. W.\} and Chung, \{J. H.\} and T. Egami",

note = "Funding Information: The authors thank Professor T. Kajitani for his encouragement, E. Maxy, Dr. J. Nakamura, and K. Kawahara for their help, and Professor Y. Kameda for fruitful discussion. This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science, and Technology of Japan. This work has benefited from the use of NPDF at the Lujan Center at Los Alamos Neutron Science Center, Los Alamos National Laboratory and Argonne National Laboratory are funded by DOE under Contract No. W-7405-ENG-36 and W-31-109-ENG-38, respectively. The upgrade of NPDF has been funded by NSF through Grant No. DMR 00-76488.",

year = "2005",

month = feb,

day = "21",

doi = "10.1063/1.1861976",

language = "English",

volume = "86",

pages = "1--3",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Inc.",

number = "8",

}

TY - JOUR

T1 - Large displacement of germanium atoms in crystalline Ge2 Sb2 Te5

AU - Shamoto, S.

AU - Yamada, N.

AU - Matsunaga, T.

AU - Proffen, Th

AU - Richardson, J. W.

AU - Chung, J. H.

AU - Egami, T.

N1 - Funding Information: The authors thank Professor T. Kajitani for his encouragement, E. Maxy, Dr. J. Nakamura, and K. Kawahara for their help, and Professor Y. Kameda for fruitful discussion. This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science, and Technology of Japan. This work has benefited from the use of NPDF at the Lujan Center at Los Alamos Neutron Science Center, Los Alamos National Laboratory and Argonne National Laboratory are funded by DOE under Contract No. W-7405-ENG-36 and W-31-109-ENG-38, respectively. The upgrade of NPDF has been funded by NSF through Grant No. DMR 00-76488.

PY - 2005/2/21

Y1 - 2005/2/21

N2 - Local structure of NaCl-type crystalline Ge2 Sb2 Te5 has been studied by the atomic pair distribution function analysis of pulsed neutron powder diffraction data. We have found the large displacement of germanium atoms in this crystalline phase. Usually, such a large lattice distortion has disadvantages for the electric conductivity. The electronic band structure, however, implies that this significant distortion in addition to the lattice defect at Na site reduces only thermal conductivity, while the highly ordered tellurium atoms at Cl site keep high electric conductivity.

AB - Local structure of NaCl-type crystalline Ge2 Sb2 Te5 has been studied by the atomic pair distribution function analysis of pulsed neutron powder diffraction data. We have found the large displacement of germanium atoms in this crystalline phase. Usually, such a large lattice distortion has disadvantages for the electric conductivity. The electronic band structure, however, implies that this significant distortion in addition to the lattice defect at Na site reduces only thermal conductivity, while the highly ordered tellurium atoms at Cl site keep high electric conductivity.

UR - https://www.scopus.com/pages/publications/17044377602

UR - https://www.scopus.com/pages/publications/17044377602#tab=citedBy

U2 - 10.1063/1.1861976

DO - 10.1063/1.1861976

M3 - Article

AN - SCOPUS:17044377602

SN - 0003-6951

VL - 86

SP - 1

EP - 3

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 8

M1 - 081904

ER -

Large displacement of germanium atoms in crystalline Ge2 Sb2 Te5

摘要

All Science Journal Classification (ASJC) codes

存取文件

其它文件與鏈接

指紋

引用此