Direct Observation of a Surface Phase Transition by hot Tunneling Microscopy

1992 ◽  
Vol 280 ◽  
Author(s):  
Ing-Shouh Hwang ◽  
Jene A. Golovchenko
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Transition Temperature ◽  
Direct Observation ◽  
Surface Phase ◽  
Tunneling Microscopy ◽  
Tunneling Microscope ◽  
Surface Phase Transition ◽  
Reversible Phase Transition ◽  
Reversible Phase

ABSTRACTWe study a reversible phase transition of one monolayer of Pb on a Ge(l11) surface over a range of temperature from below to above the transition temperature (∼175°C) with the tunneling microscope. The high temperature l×1 phase is a ordered monolayer l×l 2D solid. Below the transition temperature, Pb atoms are displaced from their ideal T1 positions to form trimers with periodicity.

A prominent dielectric material with extremely high-temperature and reversible phase transition in the high thermally stable perovskite-like architecture

2015 ◽  
Vol 3 (24) ◽  
pp. 6350-6358 ◽  
Author(s):  
Fang-Fang Wang ◽  
Cheng Chen ◽  
Yi Zhang ◽  
Heng-Yun Ye ◽  
Qiong Ye ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Dielectric Material ◽  
Dielectric Materials ◽  
Dielectric Anomaly ◽  
Thermally Stable ◽  
Reversible Phase Transition ◽  
Reversible Phase

A perovskite-like dielectric material (C3N2H5)·[Mn(HCOO)3] (1), exhibiting remarkably high Tc (phase transition temperature) and pronounced dielectric anomaly, can be considered as a model of novel extremely high-temperature dielectric materials.

Photoelectron diffraction and photoelectron holography study of a Ge(111) high-temperature surface phase transition

1993 ◽  
Vol 281 (3) ◽  
pp. 178-179
Author(s):  
T.T. Tran ◽  
S. Thevuthasan ◽  
Y.J. Kim ◽  
D.J. Friedman ◽  
A.P. Kaduwela ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Surface Phase ◽  
Surface Phase Transition ◽  
Photoelectron Diffraction ◽  
Temperature Surface

Photoelectron diffraction and photoelectron holography study of a Ge(111) high-temperature surface phase transition

1993 ◽  
Vol 281 (3) ◽  
pp. 270-284 ◽  
Author(s):  
T.T. Tran ◽  
S. Thevuthasan ◽  
Y.J. Kim ◽  
D.J. Friedman ◽  
A.P. Kaduwela ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Surface Phase ◽  
Surface Phase Transition ◽  
Photoelectron Diffraction ◽  
Temperature Surface

A Reversible Non-disruptive Phase Transition Shown by the Zinc Iodide Dimethylformamide Complex ZnI2(dmf)2

1998 ◽  
Vol 54 (5) ◽  
pp. 663-670 ◽  
Author(s):  
R. A. Edwards ◽  
A. J. Easteal ◽  
O. P. Gladkikh ◽  
W. T. Robinson ◽  
M. M. Turnbull ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Intermolecular Forces ◽  
Scanning Calorimetry ◽  
Space Group ◽  
Cell Parameters ◽  
Reversible Phase Transition ◽  
Higher Temperature ◽  
High Temperature Form ◽  
Reversible Phase

At 228 K crystals of ZnI2(dmf)2 show a reversible phase transition which does not disrupt the lattice. Above the transition temperature the space group is C2/c and the cell contains eight symmetrically equivalent molecules. Cooling to below the transition temperature has little effect on the cell parameters or on the Zn- and I-atom positions, but the space group is now P21/n and the asymmetric unit comprises two conformationally different molecules. These arise from cooperative rotations of either ca +25 or −43° about the Zn—O bond of one of the dmf ligands in the high-temperature form. This displacive transition involves large movements of some atoms. The corresponding chloride and bromide are isomorphous with the higher temperature C2/c form, but it is only with the iodide that the weaker intermolecular forces permit the unusual phase change. The transition has been followed by differential scanning calorimetry, which gives an enthalpy change of 1.44 (5) kJ mol−1.

Reversible phase transition between metastable structures of Si(111)c2×8 and 1×1 studied by high-temperature STM

1998 ◽  
Vol 411 (1-2) ◽  
pp. L822-L827 ◽  
Author(s):  
Mitsuru Chida ◽  
Hiroki Minoda ◽  
Yasumasa Tanishiro ◽  
Katsumichi Yagi
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Metastable Structures ◽  
Reversible Phase Transition ◽  
Reversible Phase
Sign in / Sign up

Export Citation Format

Share Document