Topological phase transitions via attosecond x-ray absorption spectroscopy

TY - JOUR

T1 - Topological phase transitions via attosecond x-ray absorption spectroscopy

AU - Mosquera, Juan f p

AU - Cistaro, Giovanni

AU - Malakhov, Mikhail

AU - Pisanty, Emilio

AU - Dauphin, Alexandre

AU - Plaja, Luis

AU - Chacón, Alexis

AU - Lewenstein, Maciej

AU - Picon, Antonio

N1 - Publisher Copyright: © 2024 The Author(s). Published by IOP Publishing Ltd.

PY - 2024/10/29

Y1 - 2024/10/29

N2 - We present a numerical experiment that demonstrates the possibility to capture topological phase transitions via an x-ray absorption spectroscopy scheme. We consider a Chern insulator whose topological phase is tuned via a second-order hopping. We perform time-dynamics simulations of the out-of-equilibrium laser-driven electron motion that enables us to model a realistic attosecond spectroscopy scheme. In particular, we use an ultrafast scheme with a circularly polarized IR pump pulse and an attosecond x-ray probe pulse. A laser-induced dichroism-type spectrum shows a clear signature of the topological phase transition. We are able to connect these signatures with the Berry structure of the system. This work extend the applications of attosecond absorption spectroscopy to systems presenting a non-trivial topological phase.

AB - We present a numerical experiment that demonstrates the possibility to capture topological phase transitions via an x-ray absorption spectroscopy scheme. We consider a Chern insulator whose topological phase is tuned via a second-order hopping. We perform time-dynamics simulations of the out-of-equilibrium laser-driven electron motion that enables us to model a realistic attosecond spectroscopy scheme. In particular, we use an ultrafast scheme with a circularly polarized IR pump pulse and an attosecond x-ray probe pulse. A laser-induced dichroism-type spectrum shows a clear signature of the topological phase transition. We are able to connect these signatures with the Berry structure of the system. This work extend the applications of attosecond absorption spectroscopy to systems presenting a non-trivial topological phase.

UR - http://www.scopus.com/inward/record.url?scp=85207948421&partnerID=8YFLogxK

U2 - 10.1088/1361-6633/ad889f

DO - 10.1088/1361-6633/ad889f

M3 - Article

SN - 0034-4885

VL - 87

JO - REPORTS ON PROGRESS IN PHYSICS

JF - REPORTS ON PROGRESS IN PHYSICS

IS - 11

M1 - 117901

ER -