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Title: Atomically imaged crystal structure and normal-state properties of superconducting C a 10 P t 4 A s 8 ( ( F e 1 x P t x ) 2 A s 2 ) 5

Abstract

Superconducting Ca 10Pt 4As 8(Fe 2As 2) 5 is rare because optimal superconducting transition temperature is achieved without chemical doping or pressure. Furthermore, the unclear crystal structure limits our ability to understand the structure-property relationship. Using atomically resolved scanning transmission electron microscopy and electron diffraction, we directly determine the structure of this superconductor: it forms a monoclinic structure (space group P2 1/n) with lattice parameters a = b = 8.76Å, c = 20.18Å, and γ = 90.5°. Compared with previously reported structures derived from diffraction experiments, the c-lattice constant is doubled due to alternating stacking of Pt 4As 8 layers, which induces a high density of stacking faults. With the establishment of the crystal structure, stacking faults, and chemical composition, the distinctive normal-state electrical and thermal transport properties of our superconducting Ca 10Pt 4As 8((Fe 1–xPt x) 2As 2) 5 (x ~ 0.05) single crystals can be explained.

Authors:
ORCiD logo [1];  [2];  [3];  [3];  [2];  [2];  [3];  [2]
  1. Louisiana State Univ., Baton Rouge, LA (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Louisiana State Univ., Baton Rouge, LA (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1566882
Alternate Identifier(s):
OSTI ID: 1560309
Report Number(s):
BNL-212152-2019-JAAM
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
SC0012704; AC02-98CH10886
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 9; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Wang, Zhen, Jin, R., Wu, Lijun, Tao, Jing, Karki, A. B., Pan, J. Y., Zhu, Yimei, and Plummer, E. W. Atomically imaged crystal structure and normal-state properties of superconducting Ca10Pt4As8((Fe1–xPtx)2As2)5. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.094103.
Wang, Zhen, Jin, R., Wu, Lijun, Tao, Jing, Karki, A. B., Pan, J. Y., Zhu, Yimei, & Plummer, E. W. Atomically imaged crystal structure and normal-state properties of superconducting Ca10Pt4As8((Fe1–xPtx)2As2)5. United States. doi:10.1103/PhysRevB.100.094103.
Wang, Zhen, Jin, R., Wu, Lijun, Tao, Jing, Karki, A. B., Pan, J. Y., Zhu, Yimei, and Plummer, E. W. Wed . "Atomically imaged crystal structure and normal-state properties of superconducting Ca10Pt4As8((Fe1–xPtx)2As2)5". United States. doi:10.1103/PhysRevB.100.094103.
@article{osti_1566882,
title = {Atomically imaged crystal structure and normal-state properties of superconducting Ca10Pt4As8((Fe1–xPtx)2As2)5},
author = {Wang, Zhen and Jin, R. and Wu, Lijun and Tao, Jing and Karki, A. B. and Pan, J. Y. and Zhu, Yimei and Plummer, E. W.},
abstractNote = {Superconducting Ca10Pt4As8(Fe2As2)5 is rare because optimal superconducting transition temperature is achieved without chemical doping or pressure. Furthermore, the unclear crystal structure limits our ability to understand the structure-property relationship. Using atomically resolved scanning transmission electron microscopy and electron diffraction, we directly determine the structure of this superconductor: it forms a monoclinic structure (space group P21/n) with lattice parameters a = b = 8.76Å, c = 20.18Å, and γ = 90.5°. Compared with previously reported structures derived from diffraction experiments, the c-lattice constant is doubled due to alternating stacking of Pt4As8 layers, which induces a high density of stacking faults. With the establishment of the crystal structure, stacking faults, and chemical composition, the distinctive normal-state electrical and thermal transport properties of our superconducting Ca10Pt4As8((Fe1–xPtx)2As2)5 (x ~ 0.05) single crystals can be explained.},
doi = {10.1103/PhysRevB.100.094103},
journal = {Physical Review B},
number = 9,
volume = 100,
place = {United States},
year = {2019},
month = {9}
}

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