Spin photocurrent spectra induced by Rashba- and Dresselhaus-type circular photogalvanic effect at inter-band excitation in InGaAs/GaAs/AlGaAs step quantum wells.
Identifieur interne : 000043 ( Main/Exploration ); précédent : 000042; suivant : 000044Spin photocurrent spectra induced by Rashba- and Dresselhaus-type circular photogalvanic effect at inter-band excitation in InGaAs/GaAs/AlGaAs step quantum wells.
Auteurs : RBID : pubmed:24646286Abstract
: Spin photocurrent spectra induced by Rashba- and Dresselhaus-type circular photogalvanic effect (CPGE) at inter-band excitation have been experimentally investigated in InGaAs/GaAs/AlGaAs step quantum wells (QWs) at room temperature. The Rashba- and Dresselhaus-induced CPGE spectra are quite similar with each other during the spectral region corresponding to the transition of the excitonic state 1H1E (the first valence subband of heavy hole to the first conduction subband of electrons). The ratio of Rashba- and Dresselhaus-induced CPGE current for the transition 1H1E is estimated to be 8.8±0.1, much larger than that obtained in symmetric QWs (4.95). Compared to symmetric QWs, the reduced well width enhances the Dresselhaus-type spin splitting, but the Rashba-type spin splitting increases more rapidly in the step QWs. Since the degree of the segregation effect of indium atoms and the intensity of build-in field in the step QWs are comparable to those in symmetric QWs, as proved by reflectance difference and photoreflectance spectra, respectively, the larger Rashba-type spin splitting is mainly induced by the additional interface introduced by step structures.
DOI: 10.1186/1556-276X-9-130
PubMed: 24646286
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Spin photocurrent spectra induced by Rashba- and Dresselhaus-type circular photogalvanic effect at inter-band excitation in InGaAs/GaAs/AlGaAs step quantum wells.</title><author><name sortKey="Yu, Jinling" uniqKey="Yu J">Jinling Yu</name><affiliation wicri:level="1"><nlm:affiliation>Institute of Micro/Nano Devices and Solar Cells, School of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, People's Republic of China. jlyu@semi.ac.cn.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Institute of Micro/Nano Devices and Solar Cells, School of Physics and Information Engineering, Fuzhou University, Fuzhou 350108</wicri:regionArea></affiliation></author><author><name sortKey="Cheng, Shuying" uniqKey="Cheng S">Shuying Cheng</name></author><author><name sortKey="Lai, Yunfeng" uniqKey="Lai Y">Yunfeng Lai</name></author><author><name sortKey="Zheng, Qiao" uniqKey="Zheng Q">Qiao Zheng</name></author><author><name sortKey="Chen, Yonghai" uniqKey="Chen Y">Yonghai Chen</name></author></titleStmt><publicationStmt><date when="2014">2014</date><idno type="doi">10.1186/1556-276X-9-130</idno><idno type="RBID">pubmed:24646286</idno><idno type="pmid">24646286</idno><idno type="wicri:Area/Main/Corpus">000110</idno><idno type="wicri:Area/Main/Curation">000110</idno><idno type="wicri:Area/Main/Exploration">000043</idno></publicationStmt></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">: Spin photocurrent spectra induced by Rashba- and Dresselhaus-type circular photogalvanic effect (CPGE) at inter-band excitation have been experimentally investigated in InGaAs/GaAs/AlGaAs step quantum wells (QWs) at room temperature. The Rashba- and Dresselhaus-induced CPGE spectra are quite similar with each other during the spectral region corresponding to the transition of the excitonic state 1H1E (the first valence subband of heavy hole to the first conduction subband of electrons). The ratio of Rashba- and Dresselhaus-induced CPGE current for the transition 1H1E is estimated to be 8.8±0.1, much larger than that obtained in symmetric QWs (4.95). Compared to symmetric QWs, the reduced well width enhances the Dresselhaus-type spin splitting, but the Rashba-type spin splitting increases more rapidly in the step QWs. Since the degree of the segregation effect of indium atoms and the intensity of build-in field in the step QWs are comparable to those in symmetric QWs, as proved by reflectance difference and photoreflectance spectra, respectively, the larger Rashba-type spin splitting is mainly induced by the additional interface introduced by step structures.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="PubMed-not-MEDLINE"><PMID Version="1">24646286</PMID><DateCreated><Year>2014</Year><Month>03</Month><Day>25</Day></DateCreated><DateCompleted><Year>2014</Year><Month>03</Month><Day>25</Day></DateCompleted><DateRevised><Year>2014</Year><Month>05</Month><Day>07</Day></DateRevised><Article PubModel="Electronic"><Journal><ISSN IssnType="Print">1931-7573</ISSN><JournalIssue CitedMedium="Print"><Volume>9</Volume><Issue>1</Issue><PubDate><Year>2014</Year></PubDate></JournalIssue><Title>Nanoscale research letters</Title><ISOAbbreviation>Nanoscale Res Lett</ISOAbbreviation></Journal><ArticleTitle>Spin photocurrent spectra induced by Rashba- and Dresselhaus-type circular photogalvanic effect at inter-band excitation in InGaAs/GaAs/AlGaAs step quantum wells.</ArticleTitle><Pagination><MedlinePgn>130</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1186/1556-276X-9-130</ELocationID><Abstract><AbstractText>: Spin photocurrent spectra induced by Rashba- and Dresselhaus-type circular photogalvanic effect (CPGE) at inter-band excitation have been experimentally investigated in InGaAs/GaAs/AlGaAs step quantum wells (QWs) at room temperature. The Rashba- and Dresselhaus-induced CPGE spectra are quite similar with each other during the spectral region corresponding to the transition of the excitonic state 1H1E (the first valence subband of heavy hole to the first conduction subband of electrons). The ratio of Rashba- and Dresselhaus-induced CPGE current for the transition 1H1E is estimated to be 8.8±0.1, much larger than that obtained in symmetric QWs (4.95). Compared to symmetric QWs, the reduced well width enhances the Dresselhaus-type spin splitting, but the Rashba-type spin splitting increases more rapidly in the step QWs. Since the degree of the segregation effect of indium atoms and the intensity of build-in field in the step QWs are comparable to those in symmetric QWs, as proved by reflectance difference and photoreflectance spectra, respectively, the larger Rashba-type spin splitting is mainly induced by the additional interface introduced by step structures.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Yu</LastName><ForeName>Jinling</ForeName><Initials>J</Initials><Affiliation>Institute of Micro/Nano Devices and Solar Cells, School of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, People's Republic of China. jlyu@semi.ac.cn.</Affiliation></Author><Author ValidYN="Y"><LastName>Cheng</LastName><ForeName>Shuying</ForeName><Initials>S</Initials></Author><Author ValidYN="Y"><LastName>Lai</LastName><ForeName>Yunfeng</ForeName><Initials>Y</Initials></Author><Author ValidYN="Y"><LastName>Zheng</LastName><ForeName>Qiao</ForeName><Initials>Q</Initials></Author><Author ValidYN="Y"><LastName>Chen</LastName><ForeName>Yonghai</ForeName><Initials>Y</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType>Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2014</Year><Month>03</Month><Day>19</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Nanoscale Res Lett</MedlineTA><NlmUniqueID>101279750</NlmUniqueID><ISSNLinking>1556-276X</ISSNLinking></MedlineJournalInfo><OtherID Source="NLM">PMC3995080</OtherID></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2014</Year><Month>2</Month><Day>3</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2014</Year><Month>3</Month><Day>7</Day></PubMedPubDate><PubMedPubDate PubStatus="aheadofprint"><Year>2014</Year><Month>3</Month><Day>19</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2014</Year><Month>3</Month><Day>21</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2014</Year><Month>3</Month><Day>22</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2014</Year><Month>3</Month><Day>22</Day><Hour>6</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>epublish</PublicationStatus><ArticleIdList><ArticleId IdType="pii">1556-276X-9-130</ArticleId><ArticleId IdType="doi">10.1186/1556-276X-9-130</ArticleId><ArticleId IdType="pubmed">24646286</ArticleId><ArticleId IdType="pmc">PMC3995080</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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