Charge and Heat Transport Phenomena in Electronic and Spin Structures in B20-type Compounds
Seiten
2015
|
1st ed. 2015
Springer Verlag, Japan
978-4-431-55659-6 (ISBN)
Springer Verlag, Japan
978-4-431-55659-6 (ISBN)
This thesis presents systematic experimental research on chiral-lattice crystals referred to as B20-type germanium compounds, especially focusing on skyrmion spin textures and Dirac electrons. An emergent electromagnetic field observed in MnGe demonstrates a formation of three-dimensional skyrmion crystals. Detection of skyrmions in nanoscale Hall bar devices made of FeGe is realized by measuring the topological Hall effect, a transport property reflecting emergent fields produced by skyrmions. By measuring the electron-filling dependence of thermopower in CoGe, a pronounced thermoelectric property in this compound is revealed to stem from the asymmetric density of states appearing at certain levels of Fermi energy in the Dirac electron state.
The three main results named above will contribute to enriching a variety of novel electromagnetic responses of emergent gauge fields in solids, to realizing high-performance skyrmion-based magnetic memory, and to designing high-efficiency thermoelectric materials, respectively.
The three main results named above will contribute to enriching a variety of novel electromagnetic responses of emergent gauge fields in solids, to realizing high-performance skyrmion-based magnetic memory, and to designing high-efficiency thermoelectric materials, respectively.
Dr.Naoya Kanazawa Department of Applied Physics, University of Tokyo kanazawa@ap.t.u-tokyo.ac.jp
Introduction.- Experimental methods.- Magnetic and transport properties in B20-type germanides.- 3D skyrmion-lattice and topological Hall effect in MnGe.- Skyrmion formation in epitaxial FeGe thin films.- 3D Dirac electrons and large thermoelectric properties in CoGe.- Conclusion.
| Reihe/Serie | Springer Theses |
|---|---|
| Zusatzinfo | 52 Illustrations, color; 8 Illustrations, black and white; XII, 89 p. 60 illus., 52 illus. in color. |
| Verlagsort | Tokyo |
| Sprache | englisch |
| Maße | 155 x 235 mm |
| Themenwelt | Naturwissenschaften ► Physik / Astronomie ► Atom- / Kern- / Molekularphysik |
| Naturwissenschaften ► Physik / Astronomie ► Elektrodynamik | |
| Naturwissenschaften ► Physik / Astronomie ► Festkörperphysik | |
| Naturwissenschaften ► Physik / Astronomie ► Quantenphysik | |
| Technik ► Elektrotechnik / Energietechnik | |
| Technik ► Maschinenbau | |
| Schlagworte | 3D Skyrmion Crystal State • B20-type Transition-metal Germanium Compound • Gauge Flux of Berry Phase • Skyrmion Structure • Strong Spin-orbit Coupling • Thermoelectric Effect in Dirac Electron System • Topological Hall Effect in Skyrmions |
| ISBN-10 | 4-431-55659-1 / 4431556591 |
| ISBN-13 | 978-4-431-55659-6 / 9784431556596 |
| Zustand | Neuware |
| Haben Sie eine Frage zum Produkt? |
Mehr entdecken
aus dem Bereich
aus dem Bereich
Buch | Softcover (2024)
Wiley-VCH (Verlag)
CHF 83,85
