Monteverde M, Garbarino G, Núñez-Regueiro M, Souletie J, Acha C, Jing X, Lu L, Pan Z W, Xie S S, Egger R
Centre de Recherches sur les Très Basses Températures, CNRS, BP 166 cedex 09, 38042 Grenoble, France.
Phys Rev Lett. 2006 Oct 27;97(17):176401. doi: 10.1103/PhysRevLett.97.176401. Epub 2006 Oct 23.
We report that the conductance of macroscopic multiwall nanotube (MWNT) bundles under pressure shows power laws in temperature and voltage, as corresponding to a network of bulk-bulk connected Tomonaga-Luttinger liquids (LLs). Contrary to individual MWNTs, where the observed power laws are attributed to Coulomb blockade, the measured ratio for the end and bulk obtained exponents, approximately 2.4, can be accounted for only by LL theory. At temperatures characteristic of interband separation, it increases due to thermal population of the conducting sheets unoccupied bands.
我们报告，在压力下宏观多壁纳米管束（MWNT）的电导率在温度和电压方面呈现幂律关系，这对应于体-体连接的汤川-卢廷格液体（LLs）网络。与单个MWNTs不同，在单个MWNTs中观察到的幂律归因于库仑阻塞，而测量得到的端部和主体的指数比约为2.4，这只能用LL理论来解释。在带间分离的特征温度下，由于导电层未占据能带的热占据，电导率会增加。
