Maximilian Thees
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View article: Electronic Structure Dimensionality of the Quantum-Critical Ferromagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>YbNi</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">P</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
Electronic Structure Dimensionality of the Quantum-Critical Ferromagnet Open
YbNi_{4}P_{2} is the first known ferromagnetic metal showing a second-order quantum phase transition. Current theoretical understanding rules out second-order ferromagnetic quantum criticality in centrosymmetric two- and three-dimensional …
View article: Large Seebeck coefficient driven by “pudding mold” flat band in hole-doped <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>CuRhO</mml:mi></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:math>
Large Seebeck coefficient driven by “pudding mold” flat band in hole-doped Open
We report the measurement, using angle-resolved photoemission spectroscopy, of the metallic electronic structure of the hole-doped thermoelectric oxide CuRh$_{0.9}$Mg$_{0.1}$O$_2$. The material is found to have a ``pudding mold'' type band…
View article: Imaging the itinerant-to-localized transmutation of electrons across the metal-to-insulator transition in V$_2$O$_3$
Imaging the itinerant-to-localized transmutation of electrons across the metal-to-insulator transition in V$_2$O$_3$ Open
In solids, strong repulsion between electrons can inhibit their movement and result in a "Mott" metal-to-insulator transition (MIT), a fundamental phenomenon whose understanding has remained a challenge for over 50 years. A key issue is ho…
View article: Visualisation des changements de la structure électronique lors des transitions de phase dans les matériaux fortement corrélés V₂O₃ et URu₂Si₂
Visualisation des changements de la structure électronique lors des transitions de phase dans les matériaux fortement corrélés V₂O₃ et URu₂Si₂ Open
In systems with strongly correlated electrons, different competing ground states can lead to exotic states of matter and new phase transitions. This thesis explores experimentally, using angle-resolved photoelectron spectroscopy (ARPES), h…
View article: Imaging the itinerant-to-localized transmutation of electrons across the metal-to-insulator transition in V <sub>2</sub> O <sub>3</sub>
Imaging the itinerant-to-localized transmutation of electrons across the metal-to-insulator transition in V <sub>2</sub> O <sub>3</sub> Open
This work shows how itinerant electrons localize due to increased interactions across the Mott metal-insulator transition.
View article: Tunable two-dimensional electron system at the (110) surface of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">SnO</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>
Tunable two-dimensional electron system at the (110) surface of Open
We report the observation of a two-dimensional electron system (2DES) at the\n$(110)$ surface of the transparent bulk insulator SnO$_2$, and the tunability\nof its carrier density by means of temperature or Eu deposition. The 2DES is\ninse…
View article: Valence characterisation of the subsurface region in
Valence characterisation of the subsurface region in Open
Samarium hexaboride (SmB6), which lies in the mixed valence regime in the\nAnderson model, has been predicted to possess topologically protected surface\nstates. The intensive investigations on SmB6 have brought up the long standing\nquest…