Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Richarj Mondal"'
Autor:
Junji Tominaga, Yuta Saito, Muneaki Hase, Richarj Mondal, Alexander V. Kolobov, Paul Fons, Yuki Aihara
Publikováno v:
ACS Applied Materials & Interfaces. 10:26781-26786
Chalcogenide superlattices (SL), formed by the alternate stacking of GeTe and Sb$_{2}$Te$_{3}$ layers, also referred to as interfacial phase change memory (iPCM), are a leading candidate for spin based memory device applications. Theoretically, the i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2cf74b0f61543f6b5be0157f9c7680a3
https://doi.org/10.1021/acsami.8b07974
https://doi.org/10.1021/acsami.8b07974
Autor:
Takara, Suzuki, Richarj, Mondal, Yuta, Saito, Paul, Fons, Alexander V, Kolobov, Junji, Tominaga, Hidemi, Shigekawa, Muneaki, Hase
Publikováno v:
Journal of physics. Condensed matter : an Institute of Physics journal. 31(41)
We report on pump-probe based helicity dependent time-resolved Kerr measurements under infrared excitation of chalcogenide superlattices, consisting of alternately stacked GeTe and Sb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::060fc5d253c75d1ef63e97a04d4159c4
https://pubmed.ncbi.nlm.nih.gov/31265998
https://pubmed.ncbi.nlm.nih.gov/31265998
Publikováno v:
Journal of physics. Condensed matter : an Institute of Physics journal. 30(50)
While time-resolved pump-probe differential reflectivity and transmitivity measurements are routinely used to monitor the population relaxation dynamics on the subpicosecond time scale, it is also known that the signal in the negative delay can yield
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e34ca9028266f128ffccc32dab487614
https://pubmed.ncbi.nlm.nih.gov/30474617
https://pubmed.ncbi.nlm.nih.gov/30474617
Autor:
Junji Tominaga, Paul Fons, Muneaki Hase, Yuta Saito, Alexander V. Kolobov, Richarj Mondal, Akira Arai
We explore the ultrafast reflectivity response from photo-generated coupled phonon-surface Dirac plasmons in Sb$_2$Te$_3$ topological insulators several quintuple layers thick. The transient coherent phonon spectra obtained at different time frames e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c2ebd80699f4b605de6074e3980103e1
http://arxiv.org/abs/1804.09308
http://arxiv.org/abs/1804.09308
Publikováno v:
Journal of physics. Condensed matter : an Institute of Physics journal. 30(10)
We have closely examined the emission spectrum at the heavy-hole exciton resonance in a high-quality GaAs multi-quantum well (MQW) sample using picosecond excitation-correlation photoluminescence (ECPL) spectroscopy. Dynamics of the ECPL signal at lo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d00a97c8e785533d2f876e83d74e32a
https://pubmed.ncbi.nlm.nih.gov/29376837
https://pubmed.ncbi.nlm.nih.gov/29376837
Autor:
Deepak K. S. Ambast, Sanjio S. Zade, Palas Baran Pati, Bipul Pal, Richarj Mondal, Bhavtosh Bansal
Publikováno v:
Optics Communications. 334:184-189
We analyze the applicability of transient thermal lens (TL) z-scan technique as a sensitive tool to measure heat diffusivity of liquids. Suitable dyes at very low concentrations were added to the host liquid to enhance the TL effect through improved
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a06479f57c96b9a7e0544e81130c8f0
https://doi.org/10.1016/j.optcom.2014.08.042
https://doi.org/10.1016/j.optcom.2014.08.042
Autor:
Alexander V. Kolobov, Richarj Mondal, Junji Tominaga, Takara Suzuki, Paul Fons, Muneaki Hase, Hidemi Shigekawa, Yuta Saito
Publikováno v:
Journal of Physics: Condensed Matter. 31:415502
We report on pump-probe based helicity dependent time-resolved Kerr measurements under infrared excitation of chalcogenide superlattices, consisting of alternately stacked GeTe and Sb2Te3 layers. The Kerr rotation signal consists of the specular inve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0fae83c2f3ff9fd492a142a1b3f44b35
https://doi.org/10.1088/1361-648x/ab2e9f
https://doi.org/10.1088/1361-648x/ab2e9f
Autor:
Yuta Saito, Junji Tominaga, Muneaki Hase, Akira Arai, Alexander V. Kolobov, Richarj Mondal, Paul Fons
Publikováno v:
EPJ Web of Conferences, Vol 205, p 04021 (2019)
We report upon observation of a transient Fano resonance, a quantum interference between coherent phonon and Dirac plasmons, that persisted for up to 1 picosecond in the topological insulator Sb2Te3 investigated using coherent phonon spectroscopy.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::51c4c0f7b1d5319872b3d14a9a7c38b2
https://doi.org/10.1051/epjconf/201920504021
https://doi.org/10.1051/epjconf/201920504021
Autor:
Alexander V. Kolobov, Yuta Saito, Yuki Aihara, Junji Tominaga, Richarj Mondal, Paul Fons, Muneaki Hase, Shuichi Murakami
Publikováno v:
Scientific Reports
Scientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
Scientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
Topological insulators (TIs) are characterized by possessing metallic (gapless) surface states and a finite band-gap state in the bulk. As the thickness of a TI layer decreases down to a few nanometer, hybridization between the top and bottom surface
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::811844ed5930698b1774f6928cbcfe9c
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100792594
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100792594
Autor:
Richarj Mondal, Rupak Bhattacharya, Pradip Khatua, Gottfried H. Döhler, Bipul Pal, Eli Kapon, A. Rudra, Stefan Malzer, Bhavtosh Bansal
Publikováno v:
Physical Review Letters
We study a specific type of lifetime broadening resulting in the well-known exponential "Urbach tail" density of states within the energy gap of an insulator. After establishing the frequency and temperature dependence of the Urbach edge in GaAs quan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d2415c7538c6d9160fbf8d76def43f6
https://doi.org/10.1103/physrevlett.114.047402
https://doi.org/10.1103/physrevlett.114.047402