Excitonic Insulator Enabled Ultrasensitive Terahertz Photodetection with Efficient Low‐Energy Photon Harvesting
Sign Up to like & getrecommendations! Published in 2022 at "Advanced Science"
DOI: 10.1002/advs.202204580
Abstract: Despite the interest toward the terahertz (THz) rapidly increasing, the high‐efficient detection of THz photon is not widely available due to the low photoelectric conversion efficiency at this low‐energy photon regime. Excitonic insulator (EI) states… read more here.
Keywords: excitonic insulator; photon; low energy; energy photon ... See more keywords
Possible excitonic insulating phase in quantum confined Sb nanoflakes.
Sign Up to like & getrecommendations! Published in 2019 at "Nano letters"
DOI: 10.1021/acs.nanolett.9b01123
Abstract: In the 1960s, it was proposed that, in small indirect band gap materials, excitons can spontaneously form because the density of carriers is too low to screen the attractive Coulomb interaction between electrons and holes.… read more here.
Keywords: insulating phase; excitonic insulator; quantum confined;
Oxygen-terminated Ti3C2 MXene as an excitonic insulator
Sign Up to like & getrecommendations! Published in 2023 at "Applied Physics Letters"
DOI: 10.1063/5.0143313
Abstract: Excitonic insulators originate from the formation of bound excitons (electron–hole pairs) in semiconductors and provide a solid-state platform for quantum many-boson physics. We determined the excitonic insulator phase of Ti3C2O2 monolayer from its indirect quasiparticle… read more here.
Keywords: ti3c2 mxene; excitonic insulator; physics; terminated ti3c2 ... See more keywords
Comparing the generalized Kadanoff-Baym ansatz with the full Kadanoff-Baym equations for an excitonic insulator out of equilibrium
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.102.115157
Abstract: We investigate out-of-equilibrium dynamics in an excitonic insulator (EI) with a finite momentum pairing perturbed by a laser-pulse excitation and a sudden coupling to fermionic baths. The transient dynamics of the excitonic order parameter is… read more here.
Keywords: generalized kadanoff; equilibrium; kadanoff; kadanoff baym ... See more keywords
Doping-controlled transition from excitonic insulator to semimetal in Ta2NiSe5
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.102.161116
Abstract: Excitonic insulator (EI) is an intriguing insulating phase of matter, where electrons and holes are bonded into pairs, so called excitons, and form a phase-coherent state via Bose-Einstein Condensation (BEC). Its theoretical concept has been… read more here.
Keywords: excitonic insulator; doping controlled; transition excitonic; transition ... See more keywords
Ginzburg-Landau action and polarization current in an excitonic insulator model of electronic ferroelectricity
Sign Up to like & getrecommendations! Published in 2023 at "Physical Review B"
DOI: 10.1103/physrevb.107.155142
Abstract: In comparison to transport of spin polarization in ferromagnets, transport of electric polarization in ferroelectrics remains less explored. Taking an excitonic insulator model of electronic ferroelectricity as a prototypical example, we theoretically investigate the low-energy… read more here.
Keywords: polarization; excitonic insulator; insulator model; electric polarization ... See more keywords
Polaron spectroscopy of a bilayer excitonic insulator
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review B"
DOI: 10.1103/physrevb.107.155303
Abstract: Recent advances in fabrication of two dimensional materials and their moir\'e heterostructures have opened up new avenues for realization of ground-state excitonic insulators, where the structure spontaneously develops a finite interlayer electronic polarization. We propose… read more here.
Keywords: spectroscopy; spectroscopy bilayer; polaron spectroscopy; excitonic insulator ... See more keywords
Magnetic excitation and local magnetic susceptibility of the excitonic insulator Ta 2 NiSe 5 investigated by Se 77 NMR
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review B"
DOI: 10.1103/physrevb.97.165127
Abstract: $^{77}\mathrm{Se}$ NMR measurements were made on polycrystalline and single-crystalline samples to elucidate local magnetic susceptibility and magnetic excitation of ${\mathrm{Ta}}_{2}{\mathrm{NiSe}}_{5}$, which is proposed to undergo an exciton condensation accompanied by a structural transition at ${T}_{\mathrm{c}}=328\phantom{\rule{0.16em}{0ex}}\mathrm{K}$.… read more here.
Keywords: magnetic excitation; local magnetic; mathrm; magnetic susceptibility ... See more keywords
Strong interband interaction in the excitonic insulator phase of Ta2NiSe5
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review B"
DOI: 10.1103/physrevb.99.075408
Abstract: Excitonic insulator (EI) was proposed in 60's as a distinct insulating state originating from pure electronic interaction, but its material realization has been elusive with extremely few material candidates and with only limited evidence such… read more here.
Keywords: strong interband; excitonic insulator; interband interaction; insulator ... See more keywords
Examination of Nonlinear Conductivity on the Excitonic Insulator Candidate Ta2NiSe5
Sign Up to like & getrecommendations! Published in 2020 at "Journal of the Physical Society of Japan"
DOI: 10.7566/jpsj.89.045001
Abstract: The excitonic insulator candidate Ta2NiSe5 has been examined by means of the response to a pulse electric field. We observed linear current–voltage relationship at 200 V/cm, indicating the robustne... read more here.
Keywords: candidate ta2nise5; insulator candidate; excitonic insulator;
Photoinduced Phase Transition from Excitonic Insulator to Semimetal-like State in Ta2Ni1−xCoxSe5 (x = 0.10)
Sign Up to like & getrecommendations! Published in 2020 at "Journal of the Physical Society of Japan"
DOI: 10.7566/jpsj.89.124703
Abstract: We report time-resolved angle-resolved photoemission study on Ta2Ni1−xCoxSe5 (x = 0.10) in which the excitonic insulator (EI) transition temperature is reduced by Co substitution for Ni. In the pho... read more here.
Keywords: phase transition; ta2ni1 xcoxse5; photoinduced phase; excitonic insulator ... See more keywords