{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T00:56:13Z","timestamp":1760144173547,"version":"build-2065373602"},"reference-count":36,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2024,3,27]],"date-time":"2024-03-27T00:00:00Z","timestamp":1711497600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"PNRR MUR","award":["PE0000023-NQSTI"],"award-info":[{"award-number":["PE0000023-NQSTI"]}]},{"name":"National Infrastructure of the National Research Council for quantum simulations and calculations \u201cPASQUA\u201d","award":["PE0000023-NQSTI"],"award-info":[{"award-number":["PE0000023-NQSTI"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>InAs quantum wells (QWs) are promising material systems due to their small effective mass, narrow bandgap, strong spin\u2013orbit coupling, large g-factor, and transparent interface to superconductors. Therefore, they are promising candidates for the implementation of topological superconducting states. Despite this potential, the growth of InAs QWs with high crystal quality and well-controlled morphology remains challenging. Adding an overshoot layer at the end of the metamorphic buffer layer, i.e., a layer with a slightly larger lattice constant than the active region of the device, helps to overcome the residual strain and provides optimally relaxed lattice parameters for the QW. In this work, we systematically investigated the influence of overshoot layer thickness on the morphological, structural, strain, and transport properties of undoped InAs QWs on GaAs(100) substrates. Transmission electron microscopy reveals that the metamorphic buffer layer, which includes the overshoot layer, provides a misfit dislocation-free InAs QW active region. Moreover, the residual strain in the active region is compressive in the sample with a 200 nm-thick overshoot layer but tensile in samples with an overshoot layer thicker than 200 nm, and it saturates to a constant value for overshoot layer thicknesses above 350 nm. We found that electron mobility does not depend on the crystallographic directions. A maximum electron mobility of 6.07 \u00d7 105 cm2\/Vs at 2.6 K with a carrier concentration of 2.31 \u00d7 1011 cm\u22122 in the sample with a 400 nm-thick overshoot layer has been obtained.<\/jats:p>","DOI":"10.3390\/nano14070592","type":"journal-article","created":{"date-parts":[[2024,3,27]],"date-time":"2024-03-27T14:14:09Z","timestamp":1711548849000},"page":"592","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Influence of an Overshoot Layer on the Morphological, Structural, Strain, and Transport Properties of InAs Quantum Wells"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8748-0788","authenticated-orcid":false,"given":"Omer","family":"Arif","sequence":"first","affiliation":[{"name":"NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza S. Silvestro 12, I-56127 Pisa, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Laura","family":"Canal","sequence":"additional","affiliation":[{"name":"NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza S. Silvestro 12, I-56127 Pisa, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5525-8525","authenticated-orcid":false,"given":"Elena","family":"Ferrari","sequence":"additional","affiliation":[{"name":"Istituto dei Materiali per l\u2019Elettronica ed il Magnetismo, Consiglio Nazionale delle Ricerche (IMEM\u2013CNR), Parco Area delle Scienze 37\/A, I-43124 Parma, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9355-1834","authenticated-orcid":false,"given":"Claudio","family":"Ferrari","sequence":"additional","affiliation":[{"name":"Istituto dei Materiali per l\u2019Elettronica ed il Magnetismo, Consiglio Nazionale delle Ricerche (IMEM\u2013CNR), Parco Area delle Scienze 37\/A, I-43124 Parma, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5346-4026","authenticated-orcid":false,"given":"Laura","family":"Lazzarini","sequence":"additional","affiliation":[{"name":"Istituto dei Materiali per l\u2019Elettronica ed il Magnetismo, Consiglio Nazionale delle Ricerche (IMEM\u2013CNR), Parco Area delle Scienze 37\/A, I-43124 Parma, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1663-1558","authenticated-orcid":false,"given":"Lucia","family":"Nasi","sequence":"additional","affiliation":[{"name":"Istituto dei Materiali per l\u2019Elettronica ed il Magnetismo, Consiglio Nazionale delle Ricerche (IMEM\u2013CNR), Parco Area delle Scienze 37\/A, I-43124 Parma, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7452-7276","authenticated-orcid":false,"given":"Alessandro","family":"Paghi","sequence":"additional","affiliation":[{"name":"NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza S. Silvestro 12, I-56127 Pisa, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1989-5679","authenticated-orcid":false,"given":"Stefan","family":"Heun","sequence":"additional","affiliation":[{"name":"NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza S. Silvestro 12, I-56127 Pisa, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6242-9417","authenticated-orcid":false,"given":"Lucia","family":"Sorba","sequence":"additional","affiliation":[{"name":"NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza S. Silvestro 12, I-56127 Pisa, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,3,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"17648","DOI":"10.1103\/PhysRevB.51.17648","article-title":"Cyclotron-resonance studies in relaxed InxGa1\u2212xAs (0 \u2264 x \u2264 1) epilayers","volume":"51","author":"Shen","year":"1995","journal-title":"Phys. Rev. B"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"7728","DOI":"10.1103\/PhysRevB.60.7728","article-title":"Larmor beats and conduction electron g factors in InxGa1\u2212xAs\/GaAs quantum wells","volume":"60","author":"Malinowski","year":"1999","journal-title":"Phys. Rev. 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