PbTe 열전재료에 형성된 HgTe 나노개제물의 석출거동: 초기 격자 불일치의 형성, 이론적 계산 및 실험적 증명 = Precipitation Behaviors of HgTe Nanoinclusions Formed in Thermoelectric PbTe: Initial Induced Lattice Mismatch, Theoretical Calculation and Experimental Verification

다국어 초록 (Multilingual Abstract)

A highly strained nanostructure comprising crystallographically aligned HgTe nanoinclusions and a surrounding PbTe matrix has been synthesized using a precipitation process of supersaturated HgTe-PbTe alloys. From the early precipitation stage, HgTe nanoinclusions take disk shape, which is transformed from initial HgTe nuclei, although there is no lattice constant difference of the two end components at standard state. As a primary reason for the morphological transformation of the initial spherical HgTe nuclei to HgTe nanodisks, the induced lattice mismatch is suggested. On the condition that the HgTe nanodisks maintain perfect coherent nature with PbTe matrix, the stress-free lattice constant of constrained HgTe nanodisks has been calculated based on the defined concept of the strain-induced tetragonality, the linear elasticity and the actual measurement in HRTEM images.

참고문헌 (Reference)

1 A. G. Khachaturyan, 29 : 557-, 1969

2 L. J. Walpole, A300 : 270-, 1967

3 A. I. Boukai, 451 : 168-, 2007

4 B. Wolfing, 86 : 4350-, 2001

5 R. J. Asaro, 23 : 77-, 1975

6 W. C. Johnson, 36 : 3149-, 1988

7 J. K. Lee, A8 : 963-, 1977

8 A. G. Khachaturyan, B52 : 15909-, 1995

9 F. Soisson, 44 : 3789-, 1966

10 Y. Wang, 46 : 2983-, 1998

11 G. Rubin, 47 : 1995-, 1999

12 R. Muller, 16 : 53-, 1999

13 M. Karlik, 45 : 3251-, 1997

14 L. Lochte, 48 : 2969-, 2000

15 M. J. Lee, 3 : 1607-, 2003

16 M. J. Lee, 9 : 83-, 2003

17 R. Venkatasubramanian, 413 : 597-, 2001

18 B. C. Sales, 23 : 15-, 1998

19 A. G. Khachaturyan, "Theory of structural transformations in solids" John Wiley & Sons 1983

20 T. Mura, "Micromechanics of Defects in Solids" Martinus Nijhoff 1987

21 G. Simons, "Handbook on single crystal elastic constants and calculated aggregate properties" MIT Press 1971