Platinum-iron alloys, their structural and magnetic characteristics in relation to hydrothermal and low-temperature genesis

1990 ◽  
Vol 43 (1) ◽  
pp. 37-47 ◽  
Author(s):  
John F. W. Bowles
2021 ◽  
Vol 118 (17) ◽  
pp. e2021203118
Author(s):  
Biao Yang ◽  
Martin Uphoff ◽  
Yi-Qi Zhang ◽  
Joachim Reichert ◽  
Ari Paavo Seitsonen ◽  
...  

Iron silicide (FeSi) is a fascinating material that has attracted extensive research efforts for decades, notably revealing unusual temperature-dependent electronic and magnetic characteristics, as well as a close resemblance to the Kondo insulators whereby a coherent picture of intrinsic properties and underlying physics remains to be fully developed. For a better understanding of this narrow-gap semiconductor, we prepared and examined FeSi(110) single-crystal surfaces of high quality. Combined insights from low-temperature scanning tunneling microscopy and density functional theory calculations (DFT) indicate an unreconstructed surface termination presenting rows of Fe–Si pairs. Using high-resolution tunneling spectroscopy (STS), we identify a distinct asymmetric electronic gap in the sub-10 K regime on defect-free terraces. Moreover, the STS data reveal a residual density of states in the gap regime whereby two in-gap states are recognized. The principal origin of these features is rationalized with the help of the DFT-calculated band structure. The computational modeling of a (110)-oriented slab notably evidences the existence of interfacial intragap bands accounting for a markedly increased density of states around the Fermi level. These findings support and provide further insight into the emergence of surface metallicity in the low-temperature regime.


2016 ◽  
Vol 7 ◽  
pp. 1-5 ◽  
Author(s):  
Botian Zheng ◽  
Jun Zheng ◽  
Shuaishuai Si ◽  
Yu Ren ◽  
Xun Xu ◽  
...  

1972 ◽  
Vol 56 (8) ◽  
pp. 3750-3754 ◽  
Author(s):  
G. E. Shankle ◽  
J. N. McElearney ◽  
R. W. Schwartz ◽  
A. R. Kampf ◽  
R. L. Carlin

1968 ◽  
Vol 29 (2) ◽  
pp. 617-625 ◽  
Author(s):  
D. I. Bower ◽  
E. Claridge ◽  
I. S. T. Tsong

2002 ◽  
Vol 38 (4) ◽  
pp. 1797-1802 ◽  
Author(s):  
Hongguo Zhang ◽  
Ji Zhou ◽  
Yongli Wang ◽  
Longtu Li ◽  
Zhenxing Yue ◽  
...  

2017 ◽  
Vol 513 ◽  
pp. 77-81 ◽  
Author(s):  
A. Ugulava ◽  
Z. Toklikishvili ◽  
S. Chkhaidze ◽  
Sh. Kekutia

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