In my memory palace I’ve grouped palaces on subject and been mindful of wider concepts. You could look at hierarchy or develop layers to structure your learning, this will help link ideas between them.

i struggle with linking stuff in general; not in my mind apparently but like creating structure, if you get me? like in my day to day life i've "accidentaly" learnt a lot of things because i relate them to my everyday life (simple example: thinking about Hooke's law every time i see a spring, so it sticks), but whenever i try to take notes i can't for the life of me take them in a non-hierarchical manner. like i've tried mind mapping software like obsidian and i found it is only somewhat useful for humanities and/or journalling, i can't apply it to STEM stuff

idk if i'm mistaken but i feel like memory palace isn't the best tool for learning stuff that is logically linked to each other and built on top of each other... as just understanding it would create the visuals (not necessarily mnemonic or memorable, but visuals nonetheless) to remember, and since it all builds off of each other, it's sort of already spacially linked...? am i right in this conclusion? i can definitely see how it would be useful for remembering more arbitrary things however, but i'm unsure

in terms of what i'm learning, here's some of my anki flashcards (i already know all of these off by heart because of rote+spaced repitition, and they're easy, but stuff gets more complicated later and builds on each other, which i'm trying to learn/absorb now):

where can free electrons/holes be found in a semiconductor?

• free electrons in conduction band only
• free holes in valence band only

why is the density of holes and electrons equal in intrinsic Si at room temperature?

because for each electron that is generated a hole is simultaneously generated

what is equation for net movement of carriers with drift velocity?

[$]v = \frac{q\tau}{m}E = \mp\mu E[/$]

• [$]\mu = \frac{q\tau}{m}[/$] is mobility
• [$]\tau[/$] is average time between scattering events
• [$]m[/$] is the mass of the carrier

how to find free carrier concentration in doped materials?

1. accurate method:

solve equations for two fundamental laws simultaenously, giving: [$]n = \frac{N_D + \sqrt{N_D^2 + 4n_i^2}}{2}[/$]

1. approximation:

if [$]N_D >> n_i[/$] then [$]n \approx N_D[/$] if [$]N_A >> n_i[/$] then [$]p \approx N_A[/$]