Transporte cuántico en materiales de Dirac bajo campos externos y desorden
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2024
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20/10/2023
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Universidad Complutense de Madrid
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Los últimos años han visto el rápido desarrollo de los así denominados estados topológicos de la materia. Este campo representa un avance importante en la teoría de bandas de los solidos, que se estableció a partir del trabajo de Schrödinger en la década de 1920. En los materiales topológicos, las propiedades globales de los estados cuánticos aparecen a nivel macroscópico, y estados metálicos característicos emergen típicamente en la energía de Fermi. La primera observación de un estado topológico cuántico se remonta al trabajo de von Klitzing en la década de 1980 [135]. En un gas de electrones 2D bajo fuertes campos magnéticos, se midió una conductancia Hall cuantizada abaja temperatura en plateaus proporcionales a e2=h, siguiendo una progresión entera en función del campo magnéticos. El efecto Hall cuántico entero fue la primera observación de una respuesta cuantizada en una muestra macroscópica...
Recent years have seen the rapid development of the so-called topological states of matter. This field represents an important advance in the band theory of solids, which was established after the pioneering work of Schrödinger in the 1920s. In topological materials, global properties of the quantum states appear at the macroscopic level, and characteristic metallic states typically emerge at the Fermi energy. The first observation of a quantum topological state dates back to the work of von Klitzing in the 1980s [134]. In a 2D electron gas under strong magnetic fields, a quantized Hall conductance was measured at low temperature in plateaus proportional to e2=h, following an integer progression for increasing magnetic fields. The integer quantum Hall effect was the first observation of a quantized response in a macroscopic sample...
Recent years have seen the rapid development of the so-called topological states of matter. This field represents an important advance in the band theory of solids, which was established after the pioneering work of Schrödinger in the 1920s. In topological materials, global properties of the quantum states appear at the macroscopic level, and characteristic metallic states typically emerge at the Fermi energy. The first observation of a quantum topological state dates back to the work of von Klitzing in the 1980s [134]. In a 2D electron gas under strong magnetic fields, a quantized Hall conductance was measured at low temperature in plateaus proportional to e2=h, following an integer progression for increasing magnetic fields. The integer quantum Hall effect was the first observation of a quantized response in a macroscopic sample...
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Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Físicas, leída el 20-10-2023