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·ÖÏí¹ØÓÚBi2Te3ÌåϵÈȵçÐÔÄÜÄ£Äâ¼ÆËãµÄµÄÎÄÕ£¨°´Ê±¼äÏȺó˳Ðò£©£º1. Phys. Rev. B 68, 125210 (2003) http://journals.aps.org/prb/abstract/10.1103/PhysRevB.68.125210. Ó¦¸ÃÊÇÔËÓÃBoltzmannÀíÂÛ¼ÆËãBi2Te3ÈȵçÐÔÄܵĿªÉ½Ö®×÷£¬Ö±µ½2006ÄêreleaseµÄBoltzmannÔ´³ÌÐò£¨Comput. Phys. Commun. 175, 67 (2006).
http://www.sciencedirect.com/sci ... i/S0010465506001305 £©²Å³¹µ×½â¾öÁ˲ݸù¿ÆÑй¤×÷ÕßÒ²ÄÜ˳ÀûµÄ½øÐмÆËãÄ£ÄâµÄÄÑÌâ¡£ÕâÆªÎÄÕ²ÉÓõÄһЩ¼ÆËã·½·¨ºÍ·½Ê½Ò²Ò»Ö±±»ÑØÓã¨ÒÔϽ«»á½²µ½£©£¬ÀýÈ磺a.³Úԥʱ¼äµÄ´¦ÀíÉÏ£¬½«ÀíÂ۵õ½µÄµçµ¼ÂÊ/³Úԥʱ¼äÓëʵÑéµçµ¼ÂʽøÐÐÄâºÏ¡£b.¹À¼ÆZTÖµµÄ´óСÉÏÔËÓÃʵÑéµÄ¾§¸ñÈȵ¼ÂÊ£¬µÈµÈ¡£ËäÈ»ÕâЩ·½·¨¿´ÉÏÈ¥ºÜ´Ö²Ú£¬µ«ÊÇͨ¹ý½áºÏ¾­µäµÄBoltzmannÀíÂÛºÍfirst-principleÔ­ÀíÄܵóöÓëʵÑéÏà·ûµÄ½á¹û²»Äܲ»ËµÕâÊDz»Ð¡µÄ³É¹¦¡£½ÓÏÂÀ´¾ÍÊÇ3ÄêºóµÄÕâÆª2. Appl. Phys. Lett. 88, 022107 (2006).  http://scitation.aip.org/content ... /10.1063/1.2162863. ͬÑùÊÇ´¦ÀíBi2Te3Ìåϵ£¬Í¬ÑùÊÇÔËÓÃBoltzmannÀíÂÛ£¬ÔÚÈȵçϵÊýµÄ´¦ÀíÉÏ£¨³Úԥʱ¼ä£¬¾§¸ñÈȵ¼ÂÊ£©Í¬ÑùÔËÓÃÁËPhys. Rev. B 68, 125210 (2003)´¦Àí·½Ê½£¬ÕâÆªÎÄÕµÄΨһÁÁµãÊǵç×ӽṹµÄ¼ÆËãÉÏÔËÓÃtight-bonding modeling£¬ÕâÓ¦¸ÃÊÇÔÚ·½·¨ÉϵÄÒ»¸ö´Ù½ø¡£½ô½Ó×ÅÊÇ2ÄêºóµÄ3. Phys. Rev. B 77, 125209 (2008).
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.77.125209. ÔÚ¼ÆËãÔ­ÀíÉÏÒ²ÊDzÉÓÃfirst-principlesÔ­Àí½áºÏBoltzmannÀíÂÛ£¬¸ÃÎÄÖеÄÁÁµãÊdzÚԥʱ¼äµÄ´¦ÀíÉϲÉÓÃÁËMatthiessen rule£¬²»ÔÚÊǼòµ¥µÄÓëʵÑé½á¹¹½øÐÐÄâºÏ¡£ÁíÍ⿪´´ÁËÔËÓõÚÒ»ÐÔÔ­ÀíÄâºÏµÄÔ­×Ó¼äÊÆ£¨MorseÊÆ£©ÔËÓõ½lammpsÖмÆËãBi2Te3µÄ¾§¸ñÈȵ¼ÂÊÏȺӣ¬ÔÚÒ»ÕûÌ×ÊäÔËϵÊý¶¼ÊÇͨ¹ý¼ÆËãÄ£ÄâµÄÇé¿öϼÆËãµÄZTÖµÓëʵÑé·ûºÏµÄÏ൱ºÃ¡£½ÓÏÂÀ´¾ÍÊÇ4. Phys. Rev. B 80, 165203 (2009). http://dx.doi.org/10.1103/PhysRevB.80.165203. ÕâÆªÎÄÕÂûÓмÆËãBi2Te3ÌåϵµÄÊäÔËϵÊý£¬½ö½öÊÇÔÚPhys. Rev. B 77, 125209 (2008)ÄâºÏµÄÊÆ²ÎÊýµÄ»ù´¡ÉϽøÐиĽø£¨½«¸´ÔÓµÄtwo-bodyºÍthree-bodyÊÆ¸ÄΪ¸üΪ¼ò½àµÄtwo-bodyÊÆ£©£¬È»¶ø¾«¼òºóµÄÊÆ¸üÄÜ·´Ó¦Bi2Te3ÌåϵµÄÎïÀíÐÔÄÜ£¬´Ó¶ø¸ü¼Ó¾«×¼µÄÄ£ÄâµÄʵÑéÉϲâµÃµÄBi2Te3µÄ¾§¸ñÈȵ¼ÂÊ¡£
½ÓÏÂÀ´ÒªÌ¸µ½Bi2Te3µÍάÌåϵÁË£¨´Ë´¦×ÅÖØÓÚfilms£©£¬ÎÒÃÇÖªµÀBi2Te3¿éÌå²ÄÁϵĻù±¾×é³Éµ¥ÔªÊÇ5Ô­×Ӳ㣨quintuple-layer£¬ie£¬QL£©Í¨¹ývdW½áºÏ¡£¶øµÍάÌåϵÔÚÈȵçÐÔÄÜ·½Ãæ¸ü¼ÓÓÅÒ죬Òò¶ø´Ó10Ä꿪ʼ£¬¸ü¶àµÄ¹¤×÷¼¯ÖÐÓÚBi2Te3 filmsÉÏ£¬ÀýÈçÕâÆª5. Appl. Rev. Lett. 97, 212102 (2010). http://scitation.aip.org/content ... /10.1063/1.3518078. ¸ÃÎÄÀûÓõÚÒ»ÐÔÔ­Àí½áºÏLandauer formalism¼ÆËãÁËBi2Te3 QLµÄÈȵçÐÔÄÜ£¬Ô¤²âµ½Bi2Te3 QL µÄZTÖµ¾ÓÈ»¸ßµ½ÄÑÒÔÖÃÐŵÄ7.15¡£ÎÒÃÇÔÝÇÒ²»ÂÛ¸ÃZTÖµµÄÕýÈ·Óë·ñ£¬¸ÃÎĵÄһЩ·½·¨Ò²ÊÇÖµµÃ´ó¼Òѧϰ£¬ÔÚµÍάÌåϵµÄ¼ÆËãÉϲÉÓÃLandauer formalism £¨Ç°ÌáÊǸ÷½·¨ÕýÈ·µÄÖØ¸´ÁËbulk Bi2Te3µÄÈȵçÐÔÄÜ£©¡£Ôڴ˶Լ´½«Ì¤Èë¼ÆËãÐÐÒµµÄͬѧ˵һ¾äÌâÍâ»°£ºÔÚÎÒÃÇÔËÓÃÒ»ÖÖ·½·¨¼ÆËãÒ»¸öÌåϵµÄÐÔÄÜʱ£¬Ò»¶¨Òª¾­¹ýÑϸñµÄÑéÖ¤£¬²»È»¾ÍÁ¬ÎÒÃÇ×Ô¼ºÒ²²»ÄÜÈ·¶¨¼ÆËãµÄ½á¹ûÊÇ·ñÕýÈ·¡£µ±È»ÕâÆªÎÄÕµIJ»×ãÌåÏÖÔÚ£ºÔÚ¹ÀËãZTÖµÒÀÈ»ÔËÓÃʵÑéÉÏbulk Bi2Te3µÄ¾§¸ñÈȵ¼ÂÊ£¬ÔËÓÃbulk Bi2Te3µÄƽ¾ù×ÔÓɳ̼ÆËãBi2Te3 QLµÄÊäÔËϵÊý¡£½ÓÏÂÀ´6. Appl. Phys. Latt. 102, 093103 (2013). http://scitation.aip.org/content ... /10.1063/1.4794534. ¸ÃÎÄÓ¦¸ÃÊÇAppl. Rev. Lett. 97, 212102 (2010)µÄÒ»¸öÑÓÐø£¬ÒòΪÔÚ¼ÆËã·½·¨É϶¼ÊDzÉÓÃÁËDFT½áºÏLandauer formalism£¬²»Í¬µãÔÚÓÚÌåϵ´Ó1QL¼ÆËãµ½6¸öQL£¬ÓÉÓÚÔÚ¼ÆËãÉÏ´æÔÚ¾§¸ñÈȵ¼ÂÊºÍÆ½¾ù×ÔÓɳ̴óСµÄ²»È·¶¨£¬¸ÃÎÄÇÉÃîµÄ±Ü¿ªÁËÕâÁ½¸öÎÊÌâ²ÉÓÃZTeÀ´±È½ÏÈȵçÐÔÄÜËæ×ÅfilmsµÄºñ¶È±ä»¯¡£×îºó7. J. Appl. Lett. 116, 023706 (2014).
http://scitation.aip.org/content ... /10.1063/1.4889921. ¸ÃÎÄÔÚµÍάBi2Te3µÄÈȵçÐÔÄܵĴ¦ÀíÉϻعéÁËBoltzmann½áºÏDFT¡£³Úԥʱ¼ä²ÉÓÃbulk Bi2Te3µÄ³Úԥʱ¼ä£¬Ê×´ÎÄâºÏÁ˵ÍάBi2Te3µÄÔ­×Ó¼äÊÆÀ´¼ÆËã¾§¸ñÈȵ¼ÂÊ£¬Í¬Ê±Ä£Äâ¼ÆËãÁË£¨Bi0.5Sb1.5£©2Te3µÄÈȵçÐÔÄÜ¡£¸ÃÎÄÔ¤²â´«Í³µÄµÍÎÂÈȵç²ÄÁÏBi2Te3ÔÚµÍάµÄÇé¿öÏ»áת±ä³É½ÏºÃµÄÖÐΣ¨800K£©Èȵç²ÄÁÏ£¨ZT=2.2£©£¬ÕâÔÚ֮ǰµÄʵÑéµÃµ½²¿·ÖÑéÖ¤£¨ÎÄÖÐÓÐ˵Ã÷£©£¬È»¶ø£¬ÕâÖÖÔ¤²âÊÇ·ñÕæÕýÈç´Ë£¬»¹Óдý½øÒ»²½µÄÑéÖ¤¡£
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