Please use this identifier to cite or link to this item: https://doi.org/10.1002/adma.201903569
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dc.titlePolaronic Trions at the MoS2SrTiO3 Interface
dc.contributor.authorSoumya Sarkar
dc.contributor.authorSreetosh Goswami
dc.contributor.authorMaxim Trushin
dc.contributor.authorSurajit Saha
dc.contributor.authorMajid Panahandeh-Fard
dc.contributor.authorSaurav Prakash
dc.contributor.authorSherman Jun Rong Tan
dc.contributor.authorMary Scott
dc.contributor.authorKian Ping Loh
dc.contributor.authorShaffique Adam
dc.contributor.authorSinu Mathew
dc.contributor.authorThirumalai Venkatesan
dc.date.accessioned2021-04-13T09:30:58Z
dc.date.available2021-04-13T09:30:58Z
dc.date.issued2019-08-26
dc.identifier.citationSoumya Sarkar, Sreetosh Goswami, Maxim Trushin, Surajit Saha, Majid Panahandeh-Fard, Saurav Prakash, Sherman Jun Rong Tan, Mary Scott, Kian Ping Loh, Shaffique Adam, Sinu Mathew, Thirumalai Venkatesan (2019-08-26). Polaronic Trions at the MoS2SrTiO3 Interface. Advanced Materials 31 : 1903569. ScholarBank@NUS Repository. https://doi.org/10.1002/adma.201903569
dc.identifier.issn15214095
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/189222
dc.description.abstractThe reduced electrical screening in 2D materials provides an ideal platform for realization of exotic quasiparticles, that are robust and whose functionalities can be exploited for future electronic, optoelectronic, and valleytronic applications. Recent examples include an interlayer exciton, where an electron from one layer binds with a hole from another, and a Holstein polaron, formed by an electron dressed by a sea of phonons. Here, a new quasiparticle is reported, “polaronic trion” in a heterostructure of MoS2/SrTiO3 (STO). This emerges as the Fröhlich bound state of the trion in the atomically thin monolayer of MoS2 and the very unique low energy soft phonon mode (≤7 meV, which is temperature and field tunable) in the quantum paraelectric substrate STO, arising below its structural antiferrodistortive (AFD) phase transition temperature. This dressing of the trion with soft phonons manifests in an anomalous temperature dependence of photoluminescence emission leading to a huge enhancement of the trion binding energy (≈70 meV). The soft phonons in STO are sensitive to electric field, which enables field control of the interfacial trion–phonon coupling and resultant polaronic trion binding energy. Polaronic trions could provide a platform to realize quasiparticle‐based tunable optoelectronic applications driven by many body effects.
dc.publisherWILEY
dc.subject2D materials
dc.subjectantiferrodistortive transition
dc.subjectsoft phonons
dc.subjecttransition metal oxides
dc.subjecttrions
dc.typeArticle
dc.contributor.departmentCENTRE FOR ADVANCED 2D MATERIALS
dc.contributor.departmentDEPT OF ELECTRICAL & COMPUTER ENGG
dc.contributor.departmentNUS NANOSCIENCE & NANOTECH INITIATIVE
dc.contributor.departmentYALE-NUS COLLEGE
dc.description.doi10.1002/adma.201903569
dc.description.sourcetitleAdvanced Materials
dc.description.volume31
dc.description.page1903569
dc.published.statePublished
dc.grant.idNRF2015NRF-CRP001-015
dc.grant.fundingagencyNational Research Foundation
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