000893045 001__ 893045
000893045 005__ 20210707134948.0
000893045 020__ $$a978-3-95806-546-8
000893045 0247_ $$2ISSN$$a1866-1807
000893045 0247_ $$2Handle$$a2128/28016
000893045 037__ $$aFZJ-2021-02523
000893045 041__ $$aEnglish
000893045 1001_ $$0P:(DE-Juel1)171236$$aWang, Xiao$$b0$$eCorresponding author$$ufzj
000893045 245__ $$aSingle crystal growth and neutron scattering studies of novel quantum materials$$f - 2021-03-18
000893045 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2021
000893045 300__ $$aVI, 145 S.
000893045 3367_ $$2DataCite$$aOutput Types/Dissertation
000893045 3367_ $$0PUB:(DE-HGF)3$$2PUB:(DE-HGF)$$aBook$$mbook
000893045 3367_ $$2ORCID$$aDISSERTATION
000893045 3367_ $$2BibTeX$$aPHDTHESIS
000893045 3367_ $$02$$2EndNote$$aThesis
000893045 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis$$bphd$$mphd$$s1625642751_17801
000893045 3367_ $$2DRIVER$$adoctoralThesis
000893045 4900_ $$aSchriften des Forschungszentrums Jülich. Reihe Schlüsseltechnologien / Key Technologies$$v239
000893045 502__ $$aDissertation, RWTH Aachen, 2021$$bDissertation$$cRWTH Aachen$$d2021
000893045 520__ $$aThe recent development of theoretical and experimental study of emergent phenomena, such as anomalous Hall effects, topological electronic band structures as well as quantum spin liquid states in condensed matter physics have evoked tremendous research interest in the search and study of novel quantum materials. High quality single crystal samples of the quantum materials, which serve as a key prerequisite to study the novel properties are of great importance in the study of quantum materials. In this PhD work, employing two cutting-edge methods: molten flux and chemical vapour transport, series of novel quantum material single high quality crystal samples have been grown, such as CeSb, PrSb, NdSb, $\alpha$-RuCl$_{3}$, Mn$_{3}$Sn,Sr$_{2}$IrO$_{4}$, Cr$_{2}$Ge$_{2}$Te$_{6}$, Cr$_{2}$Si$_{2}$Te$_{6}$, CeZn$_{3}$As$_{3}$, PrZn$_{3}$As$_{3}$, PtBi$_{2}$, ZrTe$_{5}$, which have been studied intensively in this PhD work as well as other cooperators. The second important part of this PhD thesis is to study the correlation among crystal structure, magnetic structure and physical properties in two novel quantum materials: Mn$_{3}$Sn and $\alpha$-RuCl$_{3}$ by comprehensive characterization methods. Mn$_{3}$Sn, which is proposed to be a candidate of magnetic Weyl semimetal has been studied by a combination of polarised and unpolarised neutron diffraction techniques in this work. Single crystals of topological semimetal Mn$_{3}$Sn have been grown by Sn self-flux method. The magnetic susceptibility and electronic resistivity showed a magnetic phase transition at 285K and below that, the anomalous Hall effects at room temperature disappeared completely. With a combination of unpolarised and polarised neutron study, the crystal structure and magnetic structure at low temperature have been determined and a novel double-q magnetic ground state is found. As a result of breaking symmetry, AHE could not be realised in this kind of magnetic structure but the double-q magnetic structure has offered a rare case to study the non coplanar order in materials with kagomé lattice.a-RuCl3, which is a candidate to realise Kitaev quantum spin liquid, is a layered two dimensional materials bonded with the weak Van der Weals force. Growing high quality samples of a-RuCl$_{3}$ single crystals has been a big challenge since the stacking faults will be introduced inevitably. In this thesis, single crystals up to 700 mg were successfully grown by optimising the crystal growth conditions. Based on the high quality single crystals, the low temperature crystal structure of a-RuCl$_{3}$ has been proved to be R$\overline{3}$ instead of C2/$\textit{m}$ by single crystal neutron diffraction which demonstrates that a-RuCl$_{3}$ maybe a perfect candidate to study Kitaev physics without lattice distortion. Besides, with spherical polarised neutron analysis the ordered magnetic moment direction of Ru3$^{+}$ has been precisely determined which will help to reveal the microscopic interaction in Kitaev quantum spin liquids physics. In addition, the phase diagram of a-RuCl$_{3}$ under isostatic pressures has also been determined by single crystal neutron diffraction. The results reveal the magnetic order in a-RuCl$_{3}$ could be effectively suppressed with increase of external hydrostatic pressure. However, a pressure induced structural phase transition occurs when the pressure is higher than 0.15 GPa. Despite that the quantum spin liquid state is not realised in a-RuCl$_{3}$ by the isostatic pressure, this result has proved that the pressure could change the transition temperature in Kitaev materials explicitly and will shed lights on the pressure tuning magnetic order in similar materials.
000893045 536__ $$0G:(DE-HGF)POF4-6G4$$a6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4)$$cPOF4-6G4$$fPOF IV$$x0
000893045 536__ $$0G:(DE-HGF)POF4-632$$a632 - Materials – Quantum, Complex and Functional Materials (POF4-632)$$cPOF4-632$$fPOF IV$$x1
000893045 65027 $$0V:(DE-MLZ)SciArea-170$$2V:(DE-HGF)$$aMagnetism$$x0
000893045 65017 $$0V:(DE-MLZ)GC-1604-2016$$2V:(DE-HGF)$$aMagnetic Materials$$x0
000893045 693__ $$0EXP:(DE-MLZ)DNS-20140101$$1EXP:(DE-MLZ)FRMII-20140101$$5EXP:(DE-MLZ)DNS-20140101$$6EXP:(DE-MLZ)NL6S-20140101$$aForschungs-Neutronenquelle Heinz Maier-Leibnitz $$eDNS: Diffuse scattering neutron time of flight spectrometer$$fNL6S$$x0
000893045 693__ $$0EXP:(DE-MLZ)HEIDI-20140101$$1EXP:(DE-MLZ)FRMII-20140101$$5EXP:(DE-MLZ)HEIDI-20140101$$6EXP:(DE-MLZ)SR9b-20140101$$aForschungs-Neutronenquelle Heinz Maier-Leibnitz $$eHEiDi: Single crystal diffractometer on hot source$$fSR9b$$x1
000893045 693__ $$0EXP:(DE-Juel1)ILL-IN12-20150421$$5EXP:(DE-Juel1)ILL-IN12-20150421$$eILL-IN12: Cold neutron 3-axis spectrometer$$x2
000893045 8564_ $$uhttps://juser.fz-juelich.de/record/893045/files/Schluesseltech_239.pdf$$yOpenAccess
000893045 909CO $$ooai:juser.fz-juelich.de:893045$$popenaire$$popen_access$$pdriver$$pVDB:MLZ$$pVDB$$pdnbdelivery
000893045 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)171236$$aForschungszentrum Jülich$$b0$$kFZJ
000893045 9131_ $$0G:(DE-HGF)POF4-6G4$$1G:(DE-HGF)POF4-6G0$$2G:(DE-HGF)POF4-600$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bForschungsbereich Materie$$lGroßgeräte: Materie$$vJülich Centre for Neutron Research (JCNS) (FZJ)$$x0
000893045 9131_ $$0G:(DE-HGF)POF4-632$$1G:(DE-HGF)POF4-630$$2G:(DE-HGF)POF4-600$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$aDE-HGF$$bForschungsbereich Materie$$lFrom Matter to Materials and Life$$vMaterials – Quantum, Complex and Functional Materials$$x1
000893045 9141_ $$y2021
000893045 915__ $$0StatID:(DE-HGF)0510$$2StatID$$aOpenAccess
000893045 915__ $$0LIC:(DE-HGF)CCBY4$$2HGFVOC$$aCreative Commons Attribution CC BY 4.0
000893045 920__ $$lyes
000893045 9201_ $$0I:(DE-Juel1)JCNS-4-20201012$$kJCNS-4$$lJCNS-4$$x0
000893045 9201_ $$0I:(DE-Juel1)JCNS-FRM-II-20110218$$kJCNS-FRM-II$$lJCNS-FRM-II$$x1
000893045 9201_ $$0I:(DE-Juel1)JCNS-2-20110106$$kJCNS-2$$lStreumethoden$$x2
000893045 9201_ $$0I:(DE-588b)4597118-3$$kMLZ$$lHeinz Maier-Leibnitz Zentrum$$x3
000893045 980__ $$aphd
000893045 980__ $$aVDB
000893045 980__ $$aUNRESTRICTED
000893045 980__ $$abook
000893045 980__ $$aI:(DE-Juel1)JCNS-4-20201012
000893045 980__ $$aI:(DE-Juel1)JCNS-FRM-II-20110218
000893045 980__ $$aI:(DE-Juel1)JCNS-2-20110106
000893045 980__ $$aI:(DE-588b)4597118-3
000893045 9801_ $$aFullTexts