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000878352 037__ $$aFZJ-2020-02799
000878352 041__ $$aEnglish
000878352 1001_ $$0P:(DE-Juel1)177699$$aEich, Andreas$$b0$$ufzj
000878352 1112_ $$aInstitutsseminar des JCNS-2$$cForschungszentrum Jülich$$d2020-08-06 - $$wGermany
000878352 245__ $$aThe Crystal Structure Behaviour of CrAs at Low Temperatures and at High Pressures$$f2020-08-06 - 
000878352 260__ $$c2020
000878352 3367_ $$033$$2EndNote$$aConference Paper
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000878352 3367_ $$2ORCID$$aLECTURE_SPEECH
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000878352 520__ $$aChromium Arsenide (CrAs) is the first reported Cr-based superconductor, exhibiting pressure-induced superconductivity above ~0.3 GPa with a maximum Tc ≈ 2.2 K at 1 GPa. The superconducting phase region with a dome-like shape lies in the vicinity of a helimagnetically ordered antiferromagnetic state, with a region of coexistence of magnetism and superconductivity below ~0.7 GPa. Short-range magnetic fluctuations are assumed to play an essential role for the pairing mechanism of the superconductivity, and CrAs is considered to be a model system for the interplay of superconductivity and helimagnetism.Up to now, most studies on CrAs in and near the superconducting phase region were focused on magnetic and resistive properties. The crystal structure of CrAs, however, has not been conclusively investigated yet, especially in dependence on the temperature, with only a few isolated data points existing for the full structure. The aim of our investigation is thus to give an overview of the complete structural behaviour of CrAs in dependence of temperature and pressure to serve as reference for later studies in the two-parameter field.Our results based on synchrotron X-ray single-crystal diffraction reveal previously unknown features of CrAs related to the first-order phase transition from the paramagnetic to the antiferromagnetic state at TN ≈ 267 K. A significant change in the microstructure might have practical implications for the occurrence of the superconductivity, while the discovery of one distinguished interatomic distance in the structure might further elucidate the nature of the superconductivity on a fundamental level.
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000878352 536__ $$0G:(DE-HGF)POF3-6212$$a6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621)$$cPOF3-621$$fPOF III$$x2
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000878352 9131_ $$0G:(DE-HGF)POF3-144$$1G:(DE-HGF)POF3-140$$2G:(DE-HGF)POF3-100$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$aDE-HGF$$bEnergie$$lFuture Information Technology - Fundamentals, Novel Concepts and Energy Efficiency (FIT)$$vControlling Collective States$$x0
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000878352 9131_ $$0G:(DE-HGF)POF3-621$$1G:(DE-HGF)POF3-620$$2G:(DE-HGF)POF3-600$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF3-6212$$aDE-HGF$$bForschungsbereich Materie$$lVon Materie zu Materialien und Leben$$vIn-house research on the structure, dynamics and function of matter$$x2
000878352 9131_ $$0G:(DE-HGF)POF3-621$$1G:(DE-HGF)POF3-620$$2G:(DE-HGF)POF3-600$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF3-6213$$aDE-HGF$$bForschungsbereich Materie$$lVon Materie zu Materialien und Leben$$vIn-house research on the structure, dynamics and function of matter$$x3
000878352 9131_ $$0G:(DE-HGF)POF3-623$$1G:(DE-HGF)POF3-620$$2G:(DE-HGF)POF3-600$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF3-6G4$$aDE-HGF$$bForschungsbereich Materie$$lVon Materie zu Materialien und Leben$$vFacility topic: Neutrons for Research on Condensed Matter$$x4
000878352 9141_ $$y2020
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000878352 9201_ $$0I:(DE-82)080009_20140620$$kJARA-FIT$$lJARA-FIT$$x2
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