Light-Driven Raman Coherence as a Nonthermal Route to Ultrafast Topology Switching in a Dirac Semimetal
A grand challenge underlies the entire field of topology-enabled quantum logic and information science: how to establish topological control principles driven by quantum coherence and understand the time dependence of such periodic driving. Here we demonstrate a few-cycle THz-pulse-induced phase transition in a Dirac semimetal ZrTe_{5} that is periodically driven by vibrational coherence due to excitation of the lowest Raman active mode. Above a critical THz-pump field threshold, there emerges a long-lived metastable phase, approximately 100 ps, with unique Raman phonon-assisted topological switching dynamics absent for optical pumping. The switching also manifests itself by distinct features: nonthermal spectral shape, relaxation slowing near the Lifshitz transition where the critical Dirac point occurs, and diminishing signals at the same temperature that the Berry-curvature-induced anomalous Hall effect magnetoresistance vanishes. These results, together with first-principles modeling, identify a mode-selective Raman coupling that drives the system from strong to weak topological insulators with a Dirac semimetal phase established at a critical atomic displacement controlled by the phonon coherent pumping. Harnessing of vibrational coherence can be extended to steer symmetry-breaking transitions, i.e., Dirac to Weyl ones, with implications for THz topological quantum gate and error correction applications..
Medienart: |
E-Artikel |
---|
Erscheinungsjahr: |
2020 |
---|---|
Erschienen: |
2020 |
Enthalten in: |
Zur Gesamtaufnahme - volume:10 |
---|---|
Enthalten in: |
Physical Review X - 10(2020), 2, p 021013 |
Sprache: |
Englisch |
---|
Beteiligte Personen: |
C. Vaswani [VerfasserIn] |
---|
Links: |
doi.org [kostenfrei] |
---|
Themen: |
---|
doi: |
10.1103/PhysRevX.10.021013 |
---|
funding: |
|
---|---|
Förderinstitution / Projekttitel: |
|
PPN (Katalog-ID): |
DOAJ075183919 |
---|
LEADER | 01000caa a22002652 4500 | ||
---|---|---|---|
001 | DOAJ075183919 | ||
003 | DE-627 | ||
005 | 20230501190048.0 | ||
007 | cr uuu---uuuuu | ||
008 | 230228s2020 xx |||||o 00| ||eng c | ||
024 | 7 | |a 10.1103/PhysRevX.10.021013 |2 doi | |
035 | |a (DE-627)DOAJ075183919 | ||
035 | |a (DE-599)DOAJ655836b836ee42cb8d0ecdd32cdebd3a | ||
040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
041 | |a eng | ||
050 | 0 | |a QC1-999 | |
100 | 0 | |a C. Vaswani |e verfasserin |4 aut | |
245 | 1 | 0 | |a Light-Driven Raman Coherence as a Nonthermal Route to Ultrafast Topology Switching in a Dirac Semimetal |
264 | 1 | |c 2020 | |
336 | |a Text |b txt |2 rdacontent | ||
337 | |a Computermedien |b c |2 rdamedia | ||
338 | |a Online-Ressource |b cr |2 rdacarrier | ||
520 | |a A grand challenge underlies the entire field of topology-enabled quantum logic and information science: how to establish topological control principles driven by quantum coherence and understand the time dependence of such periodic driving. Here we demonstrate a few-cycle THz-pulse-induced phase transition in a Dirac semimetal ZrTe_{5} that is periodically driven by vibrational coherence due to excitation of the lowest Raman active mode. Above a critical THz-pump field threshold, there emerges a long-lived metastable phase, approximately 100 ps, with unique Raman phonon-assisted topological switching dynamics absent for optical pumping. The switching also manifests itself by distinct features: nonthermal spectral shape, relaxation slowing near the Lifshitz transition where the critical Dirac point occurs, and diminishing signals at the same temperature that the Berry-curvature-induced anomalous Hall effect magnetoresistance vanishes. These results, together with first-principles modeling, identify a mode-selective Raman coupling that drives the system from strong to weak topological insulators with a Dirac semimetal phase established at a critical atomic displacement controlled by the phonon coherent pumping. Harnessing of vibrational coherence can be extended to steer symmetry-breaking transitions, i.e., Dirac to Weyl ones, with implications for THz topological quantum gate and error correction applications. | ||
653 | 0 | |a Physics | |
700 | 0 | |a L.-L. Wang |e verfasserin |4 aut | |
700 | 0 | |a D. H. Mudiyanselage |e verfasserin |4 aut | |
700 | 0 | |a Q. Li |e verfasserin |4 aut | |
700 | 0 | |a P. M. Lozano |e verfasserin |4 aut | |
700 | 0 | |a G. D. Gu |e verfasserin |4 aut | |
700 | 0 | |a D. Cheng |e verfasserin |4 aut | |
700 | 0 | |a B. Song |e verfasserin |4 aut | |
700 | 0 | |a L. Luo |e verfasserin |4 aut | |
700 | 0 | |a R. H. J. Kim |e verfasserin |4 aut | |
700 | 0 | |a C. Huang |e verfasserin |4 aut | |
700 | 0 | |a Z. Liu |e verfasserin |4 aut | |
700 | 0 | |a M. Mootz |e verfasserin |4 aut | |
700 | 0 | |a I. E. Perakis |e verfasserin |4 aut | |
700 | 0 | |a Y. Yao |e verfasserin |4 aut | |
700 | 0 | |a K. M. Ho |e verfasserin |4 aut | |
700 | 0 | |a J. Wang |e verfasserin |4 aut | |
773 | 0 | 8 | |i In |t Physical Review X |d American Physical Society, 2011 |g 10(2020), 2, p 021013 |w (DE-627)DOAJ000100005 |x 21603308 |7 nnns |
773 | 1 | 8 | |g volume:10 |g year:2020 |g number:2, p 021013 |
856 | 4 | 0 | |u https://doi.org/10.1103/PhysRevX.10.021013 |z kostenfrei |
856 | 4 | 0 | |u https://doaj.org/article/655836b836ee42cb8d0ecdd32cdebd3a |z kostenfrei |
856 | 4 | 0 | |u http://doi.org/10.1103/PhysRevX.10.021013 |z kostenfrei |
856 | 4 | 0 | |u http://doi.org/10.1103/PhysRevX.10.021013 |z kostenfrei |
856 | 4 | 2 | |u https://doaj.org/toc/2160-3308 |y Journal toc |z kostenfrei |
912 | |a GBV_USEFLAG_A | ||
912 | |a GBV_DOAJ | ||
912 | |a SSG-OLC-PHA | ||
951 | |a AR | ||
952 | |d 10 |j 2020 |e 2, p 021013 |