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Title: Nanoscale inhomogeneity and the evolution of correlation strength in FeSe$$_{1-x}$$S$$_x$$

Journal Article · · Nano Convergence
 [1];  [2];  [3];  [4];  [4]; ORCiD logo [5]
  1. Brookhaven National Laboratory (BNL), Upton, NY (United States); Zhejiang Univ., Hangzhou (China)
  2. Brookhaven National Laboratory (BNL), Upton, NY (United States); Chongqing Univ. (China)
  3. Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
  4. Brookhaven National Laboratory (BNL), Upton, NY (United States)
  5. Brookhaven National Laboratory (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)

We report a comprehensive study of the nanoscale inhomogeneity and disorder on the thermoelectric properties of FeSe1-$$x$$S$$x$$ (0 ≤ $$x$$ ≤ 1) single crystals and the evolution of correlation strength with S substitution. A hump-like feature in temperature-dependent thermpower is enhanced for $$x$$ = 0.12 and 0.14 in the nematic region with increasing in orbital-selective electronic correlations, which is strongly suppressed across the nematic critical point and for higher S content. Nanoscale Se/S atom disorder in the tetrahedral surroundings of Fe atoms is confirmed by scanning transmission electron microscopy measurements, providing an insight into the nanostructural details and the evolution of correlation strength in FeSe1-$$x$$S$$x$$.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
2251530
Alternate ID(s):
OSTI ID: 2284066
Report Number(s):
BNL-225265-2024-JAAM; TRN: US2408891
Journal Information:
Nano Convergence, Vol. 10, Issue 1; ISSN 2196-5404
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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