双层1T-TiSe2中的电子-激子耦合 研究背景 在半导体中,当电子与空穴形成激子的能量收益大于带隙时,系统在低温下凝聚成激子绝缘相。在半金属中,当导带和价带略有重叠时,体系也可能产生激子绝缘体相,1T相TiSe2就是一个例子。TiSe2在低温下表现出2 × 2 × 2的电荷密度波(CDW)序。虽然多数研究认为激子凝聚在TiSe...
硒化钛 1T-TiSe2(Titanium Selenide)晶体尺寸:~8毫米电学性能:半金属,电荷密度波(CDW)晶体结构:六边形晶胞参数:a = b = 0.354 nm, c = 0.601 nm, α = β = 90°, γ = 120°晶体类型:合成晶体纯度:>99.995% X-ray diffraction on a TiSe2 single crystal aligned along the (001) plane. XRD wa...
研究发现,1T-TiSe2的电子结构演变可分为三个阶段:首先,在临界温度Tcdw以上形成短程电荷密度波(CDW),然后发生能带混合,Ti-3d导电带的电子转移导致其性质的变化。其次,随着温度的降低,电子与声子的相互作用不可忽视,进而影响电子的输运行为。在165 K以下,随着载流子相干性的增强,载流子的寿命显著提高,表明系统从相对...
More information about the TiSe2 crystals we sell can be found below. 硒化钛 1T-TiSe2(Titanium Selenide)晶体尺寸 8毫米电学性能:半金属,电荷密度波(CDW)晶体结构:六边形晶胞参数:a = b = 0.354 nm, c = 0.601 nm, α = β = 90°, γ = 120°晶体类型:合成...
Taking advantage of the unique layered structure of TiSe2,the intrinsic electronic properties of two-dimensional materials can easily be tuned via heteroatomic engineering.Herein,we show that the charge density wave(CDW)phase in 1T-TiSe_(2) single-crystals can be gradually suppressed through Sn ...
#南大新闻# 【物理学院李绍春课题组在1T-TiTe2/1T-TiSe2转角异质结中发现莫尔增强的电荷密度波态】近日,南京大学物理学院李绍春教授课题组发展了范德华外延技术,首次成功生长出具有不同转角的1T-TiTe2(单层)/...
All-electron ab initio calculations are used to study the microscopic origin of the charge density wave (CDW) in 1T-TiSe2. A purely electronic picture is ruled out as a possible scenario, indicating that the CDW transition in the present system is merely a structural phase transition. The CDW...
Condensed matter physics Emergence of charge density wave domain walls above the superconducting dome in TiSe2 UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN Tai-Chang Chiang JoeYoung IlSuperconductivity in so-called unconventional superconductors is nearly always found in the vicinity of another ordered state...
TiSe2with various twist angles using molecular beam epitaxy and investigated the moiré pattern induced/enhanced charge density wave (CDW) states with scanning tunnelling microscopy. When the twist angle is near zero degrees, 2 × 2 CDW domains are formed in 1T-TiTe2, separated by 1 ×...
另一方面,1T-TiSe2因在195 K左右发生的电荷密度波(Charge Density Wave,CDW)相变,大量研究认为电子-声子相互作用在其中发挥了重要作用。 综合以上两点,研究1T-TiSe2中的等离激元是揭示其中重要的电子-空穴与电子-声子相互作用的重要途径,而高分辨电子能量损失谱是研究等离激元性质的重要手段之一。中国科学院物理研究...