Table 2.

Carrier types “e” and “h” denote “electron” and “hole,” respectively. For hole mobility, there are two quasi‐degenerate sub‐bands at valence band maximum (VBM), which are labeled as “h1” and “h2,” respectively. $m_x^{\ast }$ and $m_y^{\ast }$ are the effective masses along the x (zigzag) and y (armchair) directions. E_x and E_y are the deformation potential constants, and C_x and C_y are the elastic modulus. µ_x and µ_y are the room‐temperature carrier mobilities. The 1L, 2L, and 3L represent one layer, two layers, three layers, respectively

System	Carrier type	m*/m 0		Ex [ev]	Ey	Cx  [J m−2]	C y  [J m−2]	ui [cm2 V−1 s−1]		Ref.
		$m_x^{\ast }/m_0$	$m_y^{\ast }/m_0$					ux	uy
Lu2CF2	e	0.197	1.10	5.65	5.60	154	155	1120	206	[132]
	h1	3.06	3.75	4.68	−1.78	154	155	14.4	81.1
	h2	0.332	0.348	5.00	−2.11	154	155	1.17	6.29
Lu2C(OH)2	e	0.280	0.231	−0.696	−0.507	154	154	95.1	217.1
	h1	2.55	2.69	−6.374	0.182	154	154	0.0121	14.01
	h2	0.185	0.163	−6.374	−6.037	154	154	2051	2.91
Sc3(CN)F2	e	0.21	1.70	5.722	4.144	262.15	–	1348	319	[134]
	h1	2.93	2.81	4.422	4.622	262.15	–	78	78
	h2	0.51	0.53	−3.098	−2.894	262.15	–	956	1003
Hf2CO2	e	0.231	2.162	10.57	7.101	293.6	291.0	329	77	[116d]
	h1	0.423	0.164	7.636	2.297	293.6	291.0	924	260
	h2	0.164	0.414	2.023	7.442	293.6	291.0	343	100
TiCO2/Zr2CO2	e	2.448	0.387	3.120	4.700	484	484	118.147	2083.232	[122]
	h	0.192	0.367	2.000	2.220	484	484	46 740.451	10 382.867
TiCO2/Hf2CO2	e	2.483	0.437	2.780	4.340	528	533	157.798	1801.090
	h	0.181	0.445	1.980	1.940	528	533	58 540.494	10 183.890
Fe2CO2	e	6.99	2.45	1.63	1.04	211.41		53.23	378.80	[135]
	h	0.66	1.10	1.28	1.50	214.09		4455.42	1975.94
Co2CF2	e	1.06	7.54	6.94	4.08	168.89		22.69	69.67
	h	0.64	1.72	4.52	3.97	169.29		238.61	115.39
Co2C(OH)2	e	2.01	0.59	2.30	2.22	185.99		184.06	240.17
	h	0.59	0.39	2.73	1.19	189.86		3573.28	13 891.38
Ni2CF2	e	0.34	3.85	1.77	3.08	137.76		2192.84	64.43
	h	0.30	1.78	3.78	2.61	138.86		853.88	304.63
Ti2CO2	e	0.44	0.53	5.71	0.85	267.27	265.21	611	254	[133]
	h	0.14	0.16	1.66	2.60	267.27	265.21	74 100	22 500
Posphorene	e	1.12	0.124	5.34	2.79	103	24.5	177	1380	[136]
Sc2CF2	e	0.253	1.46	2.26	1.98	193	182	503	1070
	h1	2.25	1.46	1.91	−4.17	193	182	483	386
	h2	0.461	0.438	−5.00	2.20	193	182	309	261
Sc2C(OH)2	e	0.496	0.494	−2.65	−2.57	173	172	206	219
	h3	5.01	0.269	−3.46	−9.94	173	172	51	114
	h4	0.290	1.91	−10.0	−2.23	173	172	164	238
Nb2CN2	e	0.11	0.06	0.44	1.51	409.52	844.15	4 755 000	1 526 000	[137]
	h	0.11	0.05	5.06	4.87	–	–	25 000	95 000
Ta2CN2	e	0.11	0.08	8.82	8.26	458.10	940.27	12 000	37 000
	h	0.10	0.06	1.85	2.45	–	–	318 000	621 000
ScCCl2 (1L)	e	0.23	1.319	1.17	1.19	158.9	161.1	19 277	3351	[131]
	h	0.685	2.260	1.88	1.79	158.9	161.1	1127	380
2L	e	0.231	1.337	1.07	1.04	311.9	316.7	45 342	8421
	h	0.412	1.809	2.05	2.03	311.9	316.7	4437	1047
3L	e	0.232	1.325	1.40	1.34	475.8	479.8	40 457	7806
	h	0.379	1.887	1.76	1.76	475.8	479.8	10 227	2074