2014/07/28 ᇌங औ፦ྸ 1 ዌጂ˳ƷЎ ǰȩȕǧȳȢȇȫƴƓƚǔ ǨȃǸƷЎཞ७ ŬƍLJLJư ȐȳȉǮȣȃȗ ƍэޓ ஊǓэዌጂ˳ Ŭஇᡈ ዌጂ˳э୍ᡫƷዌጂ˳ эȈȝȭǸǫȫዌጂ˳ ᡫࠝƷ Ў᧙̞ Rev. Mod. Phys.82, 3045-3067 (2010 Ҟޓ ǰȩȕǧȳƷǑƏƴǼȭȐȳȉǮȣȃȗư ȕǧȫȟ᩿ƷཎီໜưƷLjƢǔ ዴ࢟Ў ឋƕܭ፯ưƖƳƍ эȇǣȩȃǯȕǧȫȟǪȳ ݇ ଶ ܧൌ ʹ݉ ȇǣȩȃǯໜưƢǔόᥤ࢟ ཞƷЎ→ȇǣȩȃǯdzȸȳ 2 3D ȈȝȭǸǫȫȇǣȩȃǯҞޓ ŬǰȩȕǧȳǍ3DȈȝȭǸǫȫዌጂ˳ưƸ2DȇǣȩȃǯȕǧȫȟǪȳ Ŭ3DȈȝȭǸǫȫȇǣȩȃǯҞޓƸᲭƭμƯƷᢃѣ૾ӼƴඝƬƨȐȫǯ ȇǣȩȃǯȕǧȫȟǪȳǛਤƭ ಮŷƳྵᝋ ˂Ʒ܇ཞ७Ʒܱྵ ᩼ࠝƴ᭗ƍȐȫǯǭȣȪǢᆆѣࡇ ዴ࢟ᄬൢ৽৴ ਰѣ܇ǹȔȳțȸȫјௐ ߾ٻӒᄬࣱ ȯǤȫҞޓ ǢǯǷǪȳዌጂ˳ ȈȝȭǸǫȫឬˡ˳ݰ 3DȈȝȭǸǫȫȇǣȩȃǯҞޓƷͅᙀCd3As2ƴƭƍƯᩓ܇ನᡯǛᛦ௹ 3 Cd3AS2 ኽನᡯƱ ȖȪȫǢȳǾȸȳ (a)Cdᇌ૾(܇2ƭƷᆰࠗஊ)ƕ As᩿࣎ᇌ૾܇ɶƴλƬƯƍǔ (b)AsƱCdƷޖǛ[111]૾ӼƴᆢLj ƶƨ(ܭ܇ૠa=4.6ύ) (c)ȐȫǯȖȪȫǢȳǾȸȳ (d)kx-ky᩿ƴ৲ࢨƞǕƨᘙ᩿ ȖȪȫǢȳǾȸȳ 4 Cd3AS2 (111)᩿ǛARPESยܭ ឬ᭗ჇᆰȁȣȳȐȸϋưǁƖ ϋήᩓ܇ǹȚǯȈȫ →Cd4sƱAs3dƷȔȸǯǛᅆƢ λƸᚾ૰ƷLaueȑǿȸȳ →ǁƖ᩿Ƹ[111]૾ӼƴඝƬƯƍǔʙ Ǜᄩᛐ 13ȖȪȫǢȳǾȸȳƴӏƿ ȕǧȫȟᘙ᩿ȞȃȔȳǰ ហƍρᚌ࢟ƸȖȪȫǢȳǾȸȳ →ǁƖ᩿Ƹ(111)᩿ →ܭ܇ૠ4.6ύ 5 Cd3AS2 Cd3AS2Ʒᩓ܇ನᡯ M-Γ-M૾ӼƴඝƬƯยܭƞǕƨ Ȑȳȉನᡯ ฆӳ͞ή(Emix)ưยܭ Γ-MƴᘍƳ͞ή(Es)ưยܭ ƞǕƨȐȳȉЎ ȇǣȩȃǯȐȳȉǛᅆƢ 6 hv=60eV-225eV (5eV step) Cd3AS2 Cd3AS2Ʒᩓ܇ನᡯ (ϸ)-(Ϻ) ӑዴ (ϻ) ዴ࢟ ȇǣȩȃǯdzȸȳ 3DȖȪȫǢȳǾȸȳ →ီƳǔkzưƷยܭኽௐ 7 Cd3AS2 ᬴ܱȑȩȡȸǿƔǒನ ሰƠƨ(kx,ky,E)ᆰ᧓Ʒ ȇǣȩȃǯdzȸȳ →ហዴƸkxƱky૾Ӽǁ Ʒዴ࢟Ў ȇǣȩȃǯໜưƷ 3DࢍࡇȗȭȃȈ →όᥤཞƷЎǛᅆƢ ȕǧȫȟᡮࡇ Vx=8.47eVύ(1.28g106ms-1) Vy=8.56eVύ(1.3g106ms-1) →ݲƠƷီ૾ࣱƕᅆƞǕƨ ီƳǔኽӳǨȍȫǮȸưƷȗȭȃȈ →όᥤཞƷЎǛᅆƢ 8 Cd3AS2 kz૾ӼƴඝƬƨȐȳȉЎǛᛦ௹ ᬴ܱȑȩȡȸǿƔǒನ ሰƠƨ(ky,kz,E)ᆰ᧓Ʒ ȇǣȩȃǯdzȸȳ →ȔȳǯƷ᩿ƸီƳǔ kzˮፗưƷǹȩǤǹ (ky,kz,E)ᆰ᧓ƷȇǣȩȃǯໜưƷ 3Dήᩓࡇࢍ܇ȗȭȃȈ →kz૾ӼƴඝƬƨኬᧈƍȇǣȩȃǯ dzȸȳǛᅆƢ dƷᲯƭƷkzˮፗưƷยܭኽௐ ᩷ƍໜዴƸ᪬ໜǛƭƳƙǬǤȉȩǤȳ Cd3AS2 bƱൔǂǔƱȕǧȫȟ ᡮࡇƕݱƞƍ →Vz=2.16eVύ(3.27g105ms-1) Vz=0.25Vy ٻƖƳီ૾ࣱǛᅆƢ 9 3ƭƷᢃѣƴඝƬƨȐȳȉЎƷᛇኬ ɥᢿƷȇǣȩȃǯdzȸȳƸ᩼ҩஊͨ ƷƨNJARPESưᙸǒǕƳƍ →ᩓ܇ȉȸȗ kx ky kz EFǛ250meVɥƛƨ a-cư(ϸ)Ƹዴ࢟ЎǛᅆƢ 10 Cd3AS2 ᩼ҩஊͨƷನᡯ kx ky kz ီƳǔኽӳǨȍȫǮȸưƷȗȭȃȈ ហƍໜዴƸȇǣȩȃǯЎƷǬǤȉȩǤȳ ɥᢿƱɦᢿƷȇǣȩȃǯdzȸȳƸ ȇǣȩȃǯໜưƠƯƍǔ Cd3AS2 LjƬƭƷᢃѣ૾ӼưɥᢿưNj ዴ࢟ЎƕᄩᛐưƖƨ ɦᢿƱൔǂƯȕǧȫȟᡮࡇƸݱƞƍ Vx=5eVύ(7.55g105ms-1) Vy=5.1eVύ(7.7g105ms-1) 11 Vz=1.5eVύ(2.27g105ms-1) LJƱNJ Cd3As2ƸଢǒƔƴ3DȈȝȭǸǫȫȇǣȩȃǯҞޓưƋǔƜƱǛᚰଢƠƨ ʻLJư੩కƞǕƯƍƨͅᙀ A3Bi(A=NaŴKŴRb),β-ǯȪǹȈȐȩǤȈBiO2→ɧܭܤ Cd3As2 →ǰȩȕǧȳƴ٭ǘǔИƷܭܤƠƨ3D૰ ᩼ࠝƴ᭗ƍȕǧȫȟᡮࡇ →Na3BiƱൔǂƯVx/Vy/VzƸ3.5/3.5/11̿ٻƖƍ ೞᏡࣱȇȐǤǹƷܱဇႎƳͅᙀƱƠƯ EFˮፗŴǭȣȪǢ݅ࡇƷች݅ƳСࣂƕ࣏ᙲƱƞǕǔ 12
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