# Electron behavior in topological insulator based P-N overlayer interfaces

Source: [Electron behavior in topological insulator based P-N overlayer interfaces](<https://www.sota2.com/research/paper/68fa2b4e1e209131ce845d0e>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T14:07:32.320Z

Authors: L. A. Wray, M. Neupane, S.-Y. Xu, Y.-Q. Xia, A. V. Fedorov, H. Lin, S. Basak, A. Bansil, Y. S. Hor, R. J. Cava, M. Z. Hasan

Published: 2012-06-05T23:06:59.000Z

## Abstract

Topological insulators (TIs) are novel materials that manifest spin-polarized Dirac states on their surfaces or at interfaces made with conventional matter. We have measured the electron kinetics of bulk doped TI Bi$\_2$Se$\_3$ with angle resolved photoemission spectroscopy while depositing cathodic and anodic adatoms on the TI surfaces to add charge carriers of the opposite sign from bulk dopants. These P-N overlayer interfaces create Dirac point transport regimes and larger interface potentials than previous N-N type surface deposition studies, revealing unconventional Rashba-like and surface-bulk electron interactions, and an unusual characteristic distribution of spectral weight near the Dirac point in TI Dirac point interfaces. The electronic structures of P-N doped topological interfaces observed in these experiments are an important step towards the understanding of solid interfaces with topological materials.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1206.1087>)

[PDF](<https://arxiv.org/pdf/1206.1087.pdf>)