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  Emergence of an incipient ordering mode in FeSe

Rößler, S., Koz, C., Jiao, L., Rößler, U. K., Steglich, F., Schwarz, U., et al. (2015). Emergence of an incipient ordering mode in FeSe. Physical Review B, 92(6): 060505(R), pp. 1-5. doi:10.1103/PhysRevB.92.060505.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-4E17-A Version Permalink: http://hdl.handle.net/21.11116/0000-0001-17F0-6
Genre: Journal Article

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 Creators:
Rößler, S.1, Author              
Koz, Cevriye2, Author              
Jiao, Lin3, Author              
Rößler, Ulrich K.4, Author
Steglich, Frank5, Author              
Schwarz, Ulrich6, Author              
Wirth, Steffen7, Author              
Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              
2Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
3Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
4External Organizations, ou_persistent22              
5Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863467              
6Ulrich Schwarz, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863423              
7Steffen Wirth, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863460              

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 Abstract: The structurally simplest Fe-based superconductor FeSe with a critical temperature T-c approximate to 8.5 K displays a breaking of the fourfold rotational symmetry at a temperature T-s approximate to 87 K. We investigate the electronic properties of FeSe using scanning tunneling microscopy/spectroscopy (STM/STS), magnetization, and electrical transport measurements. The results indicate two energy scales: (i) T* approximate to 75 K, denoted by an onset of electron-hole asymmetry in STS, enhanced spin fluctuations, and increased positive magnetoresistance;and (ii) T** approximate to 22-30 K, marked by the opening up of a partial gap of about 8 meV in STS and a recovery of Kohler's rule. Our results reveal the onset of an incipient ordering mode at T* and its nucleation below T**. The ordering mode observed here, both in spin as well as charge channels, suggests a coupling between the spins with charge, orbital, or pocket degrees of freedom.

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Language(s): eng - English
 Dates: 2015-08-202015-08-20
 Publication Status: Published in print
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 92 (6) Sequence Number: 060505(R) Start / End Page: 1 - 5 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008