Page 10 - 共同研究R3 数理 黒田_Neat

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ྩ࿨ 3 ೥౓෼ ೋࠃؒަྲྀࣄۀ ڞಉݚڀʻਃ੥಺༰ʼ

ʢ̎ʣڞಉݚڀͷ४උঢ়گٴͼ࣮ࢪܭըͳͲɺ࣍ͷ߲໨ʹ͍ͭͯ۩ମతʹ 2 ทҎ಺Ͱهࡌ͍ͯͩ͘͠͞ɻ
ᶃ ͜Ε·Ͱͷ૬खࠃݚڀऀͱͷަྲྀঢ়گٴͼަবܦաɻ
ᶄ ೥౓ผͷ೔ຊͱ૬खࠃͷݚڀऀ૬ޓͷڠྗ෼୲ɺٴͼަྲྀܭըɺ౉ߤɾडೖܭըɻ
ᶃç૬खࠃݚڀऀͱͷަྲྀঢ়گٴͼަবܦաç
೔ຊଆݚڀ୅දऀͷࠇా͕ 2001~2002 ೥ʹάϧϊʔϒϧʹࡏ֎ݚڀһͱͯ͠଺ࡏ͠ɺϑϥϯεଆݚ
ڀ୅දऀ L. Besobmes ͓Αͼ H. Boukari ͱͷ஌ݾΛಘΔɻͦΕҎ߱ɺ൒ಋମͳ͍͠ྔࢠυοτؔ࿈ͷ
ෳ਺ͷࠃࡍձٞʹࠇాͱ L. Besombes, H. Boukari ͱ͕ಉ੮͢Δػձ͕౓ʑ͋Γɺޓ͍ͷݚڀ੒ՌΛ஌
Βͤ߹͏ͳͲͯ͠ɺަྲྀΛଓ͚Δɻ2011 ೥຤ʹஜ೾େͰ։࠵͞Εͨγϯϙδ΢Ϝʹ L. Besombes Λট
ᡈ͠ߨԋΛґཔ͢ΔɻͦͷࡍͷσΟεΧογϣϯͰɺMn ͷ୅ΘΓʹ Cr ͷݪࢠ 1 ݸΛؚΉυοτݚڀ
ͷΞΠσΟΞ͕ఏҊ͞Εɺͦͷޙɺݚڀͷҙٛɺ࣮ݱՄೳੑΛ૬ஊͨ͠ޙɺڞಉݚڀΛ։࢝͢Δ͜ͱ
Ͱ߹ҙ͢Δɻ
2014 ೥ΑΓஜ೾େͷݚڀࣨͷ MBE Λ༻͍ɺCr ఴՃ CdTe υοτͷ࡞੡Λ։࢝͢ΔɻͦͷؒɺH.
Boukari ͕ࠇాͷݚڀࣨʹ଺ࡏ͠ɺυοτ࡞੡๏ͷৄࡉͳϊ΢ϋ΢Λ఻͑ɺ·ͨ Cr ͷఴՃ๏ΛσΟε
Χογϣϯ͢ΔͳͲͯ͠αϙʔτ͢Δɻ࡞੡ͨ͠υοτࢼྉͷݦඍ෼ޫଌఆΛάϧϊʔϒϧଆͰߦ
͍ɺCr ݪࢠ 1 ݸΛؚΉυοτܗ੒ͷ༗ແΛݕূ͢Δɻ͞Βʹ 2015 ݄ 4 ݄~2018 ೥ 3 ݄ͷ 3 ೥ؒɺά
ϧϊʔϒϧɾΞϧϓେ(Université Grenoble Alpes)ͷത࢜՝ఔֶੜ(A.Lafuente-Sampietro)͕ஜ೾େͱͷμ
ϒϧσΟάϦʔϓϩάϥϜʹࢀը͠ɺάϧϊʔϒϧɺஜ೾େͷ૒ํͷ࣮ݧࣨʹ଺ࡏͯ͠υοτ࡞੡͓
ΑͼޫֶಛੑͷධՁͷ࣮ݧΛߦ͏ɻ͜ΕʹΑΓڞಉݚڀͷޮ཰తͳ਱ߦʹد༩͠ɺଟ͘ͷ੒ՌΛڍ͛
͍ͯΔ(ݚڀۀ੷ཝࢀর)ɻ
ຊਃ੥ܭը͸ɺҎ্ʹड़΂ͨ͜Ε·ͰͷڞಉݚڀͰ࣮ূ͞Εͨυοτதͷ Cr εϐϯͷ֨ࢠ࿪ͱͷ
ڧ͍݁߹Λར༻ͯ͠ɺ͞ΒͳΔݚڀͷൃలͱͯ͠ɺ֨ࢠৼಈʹΑΔ୯Ұ Cr εϐϯͷਓҝతૢ࡞Λ໨
ࢦͦ͏ͱ͢Δ΋ͷͰ͋Δɻ

ᶄç೥౓ผͷݚڀऀ૬ޓͷڠྗ෼୲ɺٴͼަྲྀܭըɺ౉ߤɾडೖܭըç
ຊݚڀܭըͰ͸ɺMBE ʹΑΓ੒௕ͨ͠୯Ұ Cr εϐϯΛؚΉ CdTe υοτࢼྉʹର͠ද໘஄ੑ೾
(SAW)Λൃੜͤ͞Δిۃߏ଄Λ૷ண͠ɺྭىࢠͷڞ໐ྭىɾ࠶݁߹ൃޫͷଌఆʹΑΓ Cr εϐϯͷঢ়
ଶΛϓϩʔϒ͢Δ͜ͱͰɺSAW ʹΑΔ Cr εϐϯ४ҐؒͷભҠΛݕग़͢Δɻ೥౓ຖͷ۩ମతͳ࣮ࢪܭ
ը͸ҎԼͷ௨ΓͰ͋Δɻ

̎̌̎̍೥౓çç
(a) ୯Ұ Cr υοτࢼྉͷ࡞੡
෼ࢠઢΤϐλΩγʔ(MBE)ʹΑΓ ZnTe ্ʹ CdTe Λੵ૚͠υοτΛࣗݾܗ੒ͤ͞ɺۃগྔͷ Cr ఴ
ՃʹΑΓυοτ౰ͨΓ 1 ݸͷ Cr ݪࢠΛؚΉࢼྉΛ࡞੡͢Δɻ͜Ε·Ͱ Cr ݪࢠ 1 ݸΛؚΉυοτͷ࡞
੡ࣗମʹ͸੒ޭ͍ͯ͠Δ͕ɺͦͷΑ͏ͳυοτ͕ܗ੒͞ΕΔׂ߹͕௿͍͜ͱ͕໰୊ͱͳ͍ͬͯΔɻͦ
͜Ͱ CdTe ૚ੵ૚ͷࡍͷ৚݅(Cd ͱ Te ͷ෼ࢠઢͷڙڅํ๏ɺ੒௕Թ౓ɺCr ෼ࢠઢͷڙڅྔ etc.)Λ࠶
ݕ౼͠ɺ͜ΕΒͷ৚݅ͷ࠷దԽʹΑΓ୯Ұ Cr ݪࢠͷυοτܗ੒ͷׂ߹Λ޲্ͤ͞Δɻ
(b) υοτࢼྉͷߏ଄ɺిࢠঢ়ଶධՁ
ಁաܕిࢠݦඍڸ؍࡯(TEM)ʹΑΓɺ࡞੡ͨ͠υοτࢼ
ྉͷߏ଄ධՁΛߦ͏ɻஅ໘֨ࢠ૾͓ΑͼΤωϧΪʔ෼ࢄܕ
X ઢղੳ(EDX)Λ༻͍ͨ૊੒෼ੳʹΑΓɺυοτͷαΠζɺ
൐͏֨ࢠ࿪ɺ͓Αͼ૊੒ධՁΛߦ͏ɻซͤͯɺ૸ࠪܕτϯ
ωϧݦඍڸ(STM)ʹΑΔஅ໘؍࡯Λߦ͍ɺυοτதͷ Cr
ݪࢠͷݕग़ͳΒͼʹిࢠঢ়ଶͷ؍ଌΛߦ͏ɻ

(c) ද໘஄ੑ೾(SAW)ൃੜͷࢼྉՃ޻ ç
SAW ൃੜͷͨΊͷࢼྉՃ޻Λߦ͏ɻCdTe υοτࢼྉͷ ਤ3: υοτࢼྉʹSAWΛൃੜͤ͞Δ
ද໘ʹѹి૚ͱͯ͠ ZnO Λੵ૚͠ɺͦͷද໘ʹ SAW ൃੜ ࢼྉߏ଄ɻCdT υοτ্ʹੵ૚ͨ͠
ͷͨΊ۳ܕͷిۃ(Interdigital Transducer ʕ IDT)Λ࡞੡͢ ZnO ѹి૚ͷද໘ʹ۳ܗిۃ(IDT)Λ
Δ(ਤ 3)ɻSAW ͷप೾਺͕ 1 ~ 2 GHz ͱͳΔΑ͏ IDT ͷߏ ૷ண͢Δɻ
଄Λઃܭ͠ɺ࡞੡͢Δɻ

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