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arXiv · 2512.00914

Field-Tunable Quantum Metric in Few-Layer Phosphorene

Md Afsar Reja·Arka Bandyopadhyay·Awadhesh Narayan
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Abstract

The quantum metric -- which quantifies the distance between quantum states -- is a fundamental component of the quantum geometric tensor, playing a crucial role in a wide range of physical phenomena. Its direct detection and control remains a challenge, requiring suitable material candidates. In this work, we present the emergence of a tunable quantum metric in a versatile two-dimensional material platform, namely, few-layer phosphorene. Using ab-initio-derived models, we show how electric fields can be used to substantially enhance the quantum metric as well as the associated quantum weight. Furthermore, we present a layer-dependent evolution of the quantum metric and its interplay with the electric field in this material. Our results establish few-layer phosphorene as a promising platform for exploring control over the quantum metric and the resulting metric responses in real materials.

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Md Afsar Reja, Arka Bandyopadhyay, Awadhesh Narayan. 2025-11-30. Field-Tunable Quantum Metric in Few-Layer Phosphorene. https://arxiv.org/abs/2512.00914

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