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Frustracija v antiferomagnetnih sistemih – laboratorij za nova stanja snovi
Published on Feb 09, 2018608 Views
Prehod iz paramagnetnega v feromagnetno ali pa antiferomagnetno stanje je eden najbolj standardnih primerov zloma simetrije v kondenzirani snovi. Pod značilno temperaturo, Curijevo v primeru feromagne
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Frustracija v antiferomagnetnih sistemih – laboratorij za nova stanja snovi00:00
Zahvala02:10
Electron correlations and phase diagrams03:39
Antiferromagnets05:45
Frustrated magnets08:32
How nature solves frustration problems?10:54
Spin stripes in frustrated AF systems13:38
β-TeVO4 : the structure and exchange interactions14:17
β-TeVO4 : the structure and exchange interactions - DFT study16:19
β-TeVO4 : the structure and exchange interactions - fitting χ18:37
Frustrated (J1 -J2 ) spin-1/2 chain19:00
Magnetic structures : neutron diffraction study - 120:34
Magnetic structures : neutron diffraction study - 222:04
Magnetic structures – phase diagram22:54
Magnetic structures – T-B phase diagram - 123:23
Magnetic structures – T-B phase diagram - 223:46
Magnetic structures – T-B phase diagram - 324:08
Magnetic structures – intermediate phase24:42
Magnetic structures – intermediate phase = Stripe phase25:46
Summary26:57
Frustrated magnetism and quantum spin liquids27:59
Fractional excitations in quantum spin liquids - 131:00
Fractional excitations in quantum spin liquids - 233:08
Experimental evidences for quantum spin liquids - 133:48
Experimental evidences for quantum spin liquids - 236:38
Triangular lattices – case study of organics38:10
Triangular lattices39:17
Bulk 1T-TaS240:07
Commensurate CDW in 1T-TaS2 - 140:33
Commensurate CDW in 1T-TaS2 - 241:00
Commensurate CDW in 1T-TaS2 - 341:30
1T-TaS2 – lack of AF LRO - 142:29
1T-TaS2 – lack of AF LRO - 243:01
181Ta Nuclear Quadrupole Resonance: another local probe43:30
181Ta NQR: another local probe44:02
181Ta NQR: No long-range AF order44:33
Probing the spin state - 144:53
Probing the spin state - 246:39
Probing the spin state - 347:29
Low-temperature inhomogeneities47:33
Conclusions48:00
How nature solves frustration problems?48:49
Acknowledgements49:12