TY - JOUR
T1 - Measuring Correlated Atomic Motion Using X-ray Diffraction
AU - Jeong, Il Kyoung
AU - Proffen, Thomas
AU - Mohiuddin-Jacobs, Farida
AU - Billinge, Simon J.L.
PY - 1999
Y1 - 1999
N2 - The atomic motions in crystals are correlated. In this paper we demonstrate that information about the correlated motion of atoms, and consequently about the bonding within the crystal, can be obtained by analyzing the peak width of the atomic pair distribution function (PDF). We have measured the PDFs of Ni and InAs using synchrotron X-ray diffraction. The analysis of the Ni data allowed us to determine the Debye temperature which is in good agreement with values found in the literature. In contrast to the isotropic metallic bonding in Ni resulting in a relatively weak correlation between the motion of neighboring atoms, we found a very strong correlation in InAs as one might expect from the covalent bond between In and As. The results are compared with theoretical predictions by Chung and Thorpe (Phys. Rev. B 1977, 55, 1545).
AB - The atomic motions in crystals are correlated. In this paper we demonstrate that information about the correlated motion of atoms, and consequently about the bonding within the crystal, can be obtained by analyzing the peak width of the atomic pair distribution function (PDF). We have measured the PDFs of Ni and InAs using synchrotron X-ray diffraction. The analysis of the Ni data allowed us to determine the Debye temperature which is in good agreement with values found in the literature. In contrast to the isotropic metallic bonding in Ni resulting in a relatively weak correlation between the motion of neighboring atoms, we found a very strong correlation in InAs as one might expect from the covalent bond between In and As. The results are compared with theoretical predictions by Chung and Thorpe (Phys. Rev. B 1977, 55, 1545).
UR - http://www.scopus.com/inward/record.url?scp=0001718733&partnerID=8YFLogxK
U2 - 10.1021/jp9836978
DO - 10.1021/jp9836978
M3 - Article
AN - SCOPUS:0001718733
SN - 1089-5639
VL - 103
SP - 921
EP - 924
JO - Journal of Physical Chemistry A
JF - Journal of Physical Chemistry A
IS - 7
ER -