Alexander V. Balatsky

Apr 10, 2024 | fotos.europapress.es | Alexander V. Balatsky

Dec 4, 2023 | link.aps.org | Thomas Reid |S. Pamir Alpay |Alexander V. Balatsky |Sanjeev K. Nayak

Topological insulators are an important family of quantum materials that exhibit a Dirac point (DP) in the surface band structure but have a finite band gap in bulk. A large degree of spin-orbit interaction and low band gap is a prerequisite for stabilizing DPs on selective atomically flat cleavage planes. Tuning of the DP in these materials has been suggested via modifications to the atomic structure of the entire system.

Jul 27, 2023 | link.aps.org | Patrick Wong |Alexander V. Balatsky

Abstract Odd-frequency superconductivity is an exotic superconducting state in which the symmetry of the gap function is odd in frequency. Here, we show that an inherent odd-frequency mode emerges dynamically under application of a Lorentz transformation of the anomalous Green function with the general frequency-dependent gap function. To see this, we consider a Dirac model with quartic potential and perform a mean-field analysis to obtain a relativistic Bogoliubov–de Gennes system.